Common use of PRESS ANNOUNCEMENTS Clause in Contracts

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. By: /s/ Xxxxxxx X. Xxxx Name: Xxxxxxx X. Xxxx Title: Chief Executive Officer and President Address for notice: Biocept, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx300 Xxxx Xxxxxx, XX 00000 16th Floor New York, NY 10022 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTINVO BIOSCIENCE, INC. Address for Notice: INVO Bioscience, Inc. By: /s/ Xxxxxxx X. Sxxxxx Xxxx 5000 Xxxxxxxxx Xxxxx Name: Xxxxxxx X. Sxxxxx Xxxx Xxxxxxxx, Florida 34240 Title: Chief Executive Officer and President Address for Attention Sxxxxx Xxxx E-Mail:sxxxx@xxxxxxx.xxx With a copy to (which shall not constitute notice): Sxxxxxxx, Mxxxxx, Rxxxxxx & Hxxxxxx LLP 300 Xxxxx Xxxx Xxxxxx, 00xx Floor Los Angeles, California 90071 Telephone: Biocept(000) 000-0000 Attention: Gxxx Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnEsq. E-mail: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx gxxxxxx@xxxxxxxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptINVO Bioscience, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INCSEANERGY MARITIME HOLDINGS CORP. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptSeanergy Maritime Holdings Corp. 000 Xxxxxxxxxxxx Xxxxxx 000 00 Xxxxxxx Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXxxxxx Attention: Chief Executive Officer and President General Counsel Email: xxxxx@xxxxxxx.xxx Xxxxx@xxxxxxxx.xx [Signature Page to April 2020 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Seanergy Maritime Holdings Corp.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agent the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC KINGSWOOD CAPITAL MARKETS, division of Benchmark Investments, Inc. By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Sxxxxx Xxxxxxxxxx Title: Executive Managing Director, Investment Banking Supervisory Principal Address for notice: 10 Xxxxxxx Xxxxx, Xxxxx 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Dxxxx X. Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx dxxxxx@xxxxxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTDIGITAL ALLY, INC. By: /s/ Xxxxxxx X. Xxxx Name: Xxxxxxx Sxxxxxx X. Xxxx Title: Chairman and Chief Executive Officer and President Address for notice: Biocept10000 Xxxxxxx Xxxx. Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXX 00000 Attention: Chief Executive Officer and President Sxxxxxx X. Xxxx Email: xxxxx@xxxxxxx.xxx sxxx.xxxx@xxxxxxxxxxxxxx.xxx [Signature Page to January 2021 Placement Agency Agreement Between BioceptKingswood Capital Market and Digital Ally, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim Univest the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP UNIVEST SECURITIES, LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Xxxxx Xx Xxx Title: Executive Managing Director, CEO and Head of Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx00 Xxxxxxxxxxx Xxxxx #0000 New York, XX 00000 New York 10019 Attention: Xxxxx Xxxxxx, General Counsel Xxx Email: xxxxxxx@xxxxxxxx.xxx xxxx@xxxxxxx.xx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. GD CULTURE GROUP LIMITED By: /s/ Xxxxxxx X. Xxxx Name: Xxxxxxx X. Xxxxxxxx Xxxx Title: Chief Executive Officer and President Address for notice: BioceptGD Culture Group Limited Flat 1512, Inc. 0000 Xxxxx Xxxxx Drive San Diego15F, CA 92121 AttnLucky Centre, Xx.000-000 Xxx Xxxx Xxxx Xxx Xxxx, Hong Kong Attention: Chief Executive Officer and President Xxxxxxxx Xxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxx.xxx@xxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptGD Culture Group Limited and Univest Securities, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 400 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTITAN PHARMACEUTICALS, INC. By: /s/ Sxxxx Xxxxxxx X. Xxxx Name: Sxxxx Xxxxxxx X. Xxxx Title: Chief Executive Officer and President Address for notice: BioceptTitan Pharmaceuticals, Inc. 0000 400 Xxxxxx Xxxxx Xxxx., Xxxxx Drive San Diego000 Xxxxx Xxx Xxxxxxxxx, CA 92121 XX 00000 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptTitan Pharmaceuticals, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx XxxxXxxx Xxxxxx, XX 00000 16th Floor New York, NY 10022 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTBIOLASE, INC. By: /s/ Xxxxxxx Xxxx X. Xxxx Xxxxxx Name: Xxxxxxx Xxxx X. Xxxx Xxxxxx Title: Chief Executive Officer and President Address for notice: BioceptBIOLASE, Inc. 0000 00000 Xxxxx Xxxxxx Xxxxx, Xxxxx Drive San Diego000 Lake Forest, CA 92121 92610 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] xxxxxxx@xxxxxxx.xxx ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 400 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. NAKED BRAND GROUP LTD By: /s/ Xxxxxxx X. Jxxxxx Xxxxx-Xxxx Name: Xxxxxxx X. Jxxxxx Xxxxx-Xxxx Title: Chief Executive Officer and President Chairman Address for notice: BioceptNaked Brand Group Ltd c/o Bendon Limited 8 Xxxxxxx Xxxxx Xxxxxxx Xxxx Xxxxxxxx 0000, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Xxx Xxxxxxx Attn: Chief Jxxxxx Xxxxx-Xxxx, Executive Officer and President Email: xxxxx@xxxxxxx.xxx Chairman [Signature Page to January 2021 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Naked Brand Group Ltd] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 400 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTITAN PHARMACEUTICALS, INC. By: /s/ Sxxxx Xxxxxxx X. Xxxx Name: Sxxxx Xxxxxxx X. Xxxx Title: Chief Executive Officer and President Address for notice: BioceptTitan Pharmaceuticals, Inc. 0000 400 Xxxxxx Xxxxx Xxxx., Xxxxx Drive San Diego000 Xxxxx Xxx Xxxxxxxxx, CA 92121 XX 00000 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx sxxxxxxx@xxxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptTitan Pharmaceuticals, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ' role in connection therewith in the Placement Agent’s ' marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to April 28, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INCEDIBLE GARDEN AG INCORPORATED. Address for Notice: Edible Garden AG Incorporated By: /s/ Xxxxxxx 000 Xxxxxx Xxxx 519 Name: Xxxxx X. Xxxx Name: Xxxxxxx X. Xxxx Belvidere, NJ 07823 Title: Chief Executive Officer and President Address for Attention Xxxxx X. Xxxx E-Mail: With a copy to (which shall not constitute notice): Xxxxxx Xxxxxxx & Xxxxx LLP 0000 Xxxxxx & Xxxx Xxxxx Rochester, NY 14604 Telephone: Biocept(585) 232-650 Attention: Xxxxxxxxx XxXxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnEsq. E-mail: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Edible Garden AG Incorporated. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to May 19, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx XxxxXxxx Xxx, XX 00000 16th Floor New York, NY 10022 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTGREEN GIANT, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxxx Xxx Title: Chief Executive Officer and President Address for noticeXinghan Road, 19th Floor, Hanzhong City, Shaanxi Province, People’s Republic of China 723000, Attention: BioceptXxxxxx Xxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptGreen Giant, Inc., and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to June 23, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INCSEANERGY MARITIME HOLDINGS CORP. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptSeanergy Maritime Holdings Corp. 000 Xxxxxxxxxxxx Xxxxxx 000 00 Xxxxxxx Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXxxxxx Attention: Chief Executive Officer and President General Counsel Email: xxxxx@xxxxxxx.xxx Xxxxx@xxxxxxxx.xx [Signature Page to February 2021 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Seanergy Maritime Holdings Corp.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx XxxxXxxx Xxx., XX 00000 16th Floor New York, NY 10022 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTSEQLL, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxx Xxxxx Name: Xxxxxxx X. Xxxx Xxxxxx Xxxxx Title: Chief Executive Officer and President Address for notice: BioceptXxxx Xxxxxxx, Inc. 0000 Esq. Xxxxx Xxxxxxx, LLP 0 Xxxxx Drive San DiegoXxxxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx 40th Floor New York, NY 10036 xxxxxxxx@xxxxxxxxxxxx.xxx [Signature Page to February 2023 Placement Agency Agreement Between BioceptMaxim Group LLC and SeqLL, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx 300 Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, TOP SHIPS INC. By: /s/ Xxxxxxx X. Xxxx Axxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Axxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships Inc. 1 Vas. Sofias & Meg. Axxxxxxxxx Xxxxxx 000 00, Inc. 0000 Xxxxx Xxxxx Drive San DiegoXxxxxxxx Xxxxxx, CA 92121 Attn: Chief Executive Officer and President Xxxxxx Email: xxxxx@xxxxxxx.xxx axxxxxxxx@xxxxxxxx.xxx [Signature Page to June 3, 2022 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Top Ships Inc.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent Agents shall, from on and after any Closingthe Closing Date, have the right to reference the Placement and the each Placement Agent’s role in connection therewith in the such Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agents the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC A.G.P./ALLIANCE GLOBAL PARTNERS By: /s/ Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Name: Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Title: Executive Managing Director, Investment Banking Director Address for notice: 000 Xxxxxxxxx Xxxxxxx Xxxxxx 00xx Xxxxx Xxx Xxxx, XX Xxx Xxxx 00000 AttentionAttn: Xxxxx Xxxxxx, General Counsel Xxxxxx Xxxxxxx Email: xxxxxxx@xxxxxxxx.xxx xxxxxxxx@xxxxxxxxx.xxx XXXXXXX XXXXX (USA) LTD. By: /s/ Xxxxxx Xxxxxx Name: Xxxxxx Xxxxxx Title: Chief Executive Officer Address for notice: Attn: Email: xxxxxx.xxxxxx@xxxx.xxx XXXX CAPITAL PARTNERS By: /s/ Xxxx Xxxxxxxxx Name: Xxxx Xxxxxxxxx Title: Managing Director Address for notice: 000 Xxx Xxxxxxxx Xx., Xxxxx 000 Xxxxxxx Xxxxx XX, 00000 Attn: Xxxx Xxxxxxxxx Email: xxxxxxxxxx@xxxx.xxx [Company signature page follows] Accepted and Agreed to as of the date first written above: BIOCEPTVILLAGE FARMS INTERNATIONAL, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxx Title: Executive Vice President and Chief Executive Financial Officer and President Address for notice: Biocept0000-00xx Xxxxxx Xxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] ADDENDUM AXxxxxxx Xxxxxxxx

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from on and after any Closingthe Closing Date, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agent the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP PXXXXXX INVESTMENT COMPANY, LLC By: /s/ Xxxxxxxx X. Mxxxx Xxxxxx Name: Xxxxxxxx X. Mxxxx Xxxxxx Title: Executive Managing Director, Head of Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Pxxxxxx Investment Company, LLC 40 Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX 00000 AttentionAttn: Xxxxx Xxxxxx, General Counsel Mxxxx Xxxxxx Email: xxxxxxx@xxxxxxxx.xxx mxxxxxx@xxxxxxxxxxxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTINVO BIOSCIENCE, INC. By: /s/ Xxxxxxx X. Sxxxxx Xxxx Name: Xxxxxxx X. Sxxxxx Xxxx Title: Chief Executive Officer and President CEO Address for notice: BioceptINVO Bioscience, Inc. 0000 5000 Xxxxxxxxx Xxxxx Xxxxx Drive San DiegoXxxxxxxx, CA 92121 AttnXX 00000 Attention: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptSxxxxx Xxxx, Inc., Maxim Group LLC] ADDENDUM ACEO sxxxxxxxx@xxxxxxxxxxxxxx.xxx

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, AETERNA ZENTARIS INC. By: /s/ Xxxxxxx X. Xxxx Name: Xxxxxxx X. Xxxx Title: President and Chief Executive Officer and President Address for notice: BioceptAeterna Zentaris Inc., Inc. 0000 000 Xxxxx Xxxxx Drive San DiegoXxxxxxxxxxx, CA 92121 Xxxxx Xxxxxxxx 00000 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Aeterna Zentaris Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTCOLOR STAR TECHNOLOGY CO., INCLTD. By: /s/ Xxxxxxx X. Xxxx Yang (Xxxx) Xxx Name: Xxxxxxx X. Xxxx Yang (Xxxx) Xxx Title: Chief Executive Officer and President Address for notice: Biocept000 0xx Xxx, Inc. Xxxxx 0000 Xxxxx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 XX 00000 Tel: +0 (000) 000-0000 Attn: Chief Executive Officer and President Yang (Xxxx) Xxx Email: xxxxx@xxxxxxx.xxx x_xxx0000@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptColor Star Technology Co., Inc., Ltd. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking IB Address for notice: 000 400 Xxxxxxxxx Xxxxxx Xxx XxxxNew York, XX 00000 NY 10174 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTMARINA BIOTECH, INC. By: /s/ Xxxxxxx X. Xxxx Vxxxx Xxxxx Name: Xxxxxxx X. Xxxx Vxxxx Xxxxx Title: Chief Executive Officer and President Chairman Address for notice: BioceptMarina Biotech, Inc. 0000 10000 Xxxxxxxxx Xxxxxx, Xxxxx Xxxxx Drive San Diego000 City of Industry, CA 92121 AttnAttention: Chief Executive Officer and President Vxxxx Xxxxx Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] vxxxxx@xxxxxxxxxxxx.xxx ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, CASTOR MARITIME INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxx Xxxxxxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxx Xxxxxxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptCastor Maritime Inc. 000 Xxxxxxxxxxxxx Xxxxxxxxxxxx Xxxxxx Xxxxxx Xxxxx Xxxxxxx 0000 Xxxxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxxxxxxxx.xxx [Signature Page to July 12, 2020 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Castor Maritime Inc.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INCSEANERGY MARITIME HOLDINGS CORP. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptSeanergy Maritime Holdings Corp. 000 Xxxxxxxxxxxx Xxxxxx 000 00 Xxxxxxx Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXxxxxx Attention: Chief Executive Officer and President General Counsel Email: xxxxx@xxxxxxx.xxx Xxxxx@xxxxxxxx.xx [Signature Page to May 2020 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Seanergy Maritime Holdings Corp.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ' role in connection therewith in the Placement Agent’s ' marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ' role in connection therewith in the Placement Agent’s ' marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] xxxxxxxxx@xxxxxxxx.xxx ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. INPIXON By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxx Xxx Title: Chief Executive Officer and President Address for notice: BioceptXxxxx Xxxxx, Inc. 0000 Esq. Xxxxxxxx Xxxxxxxxxx & Xxxxx LLP 000 Xxxxxxx Xxx., 00xx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx XX 00000 xxx@xxx.xxx [Signature Page to February 2021 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Inpixon] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to June 7, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] ICON Capital Group: JC Company: SR Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim ICG the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP ICON CAPITAL GROUP, LLC By: /s/ Xxxxxxxx X. Xxxxxx Jxxx Xxxxxxxxx Name: Xxxxxxxx X. Xxxxxx Jxxx Xxxxxxxxx Title: Executive Managing Director, Investment Banking President/CEO Address for notice: 800 Xxxx Xxxxxx, Xxxxx 000 Xxxxxxxxx Xxxxxx Xxx XxxxNewport Beach, XX 00000 CA 92660 Attention: Xxxxx Xxxxxx, General Counsel Jxxx Xxxxxxxxx Email: xxxxxxx@xxxxxxxx.xxx jx@xxxxxxxx.xxx Accepted and Agreed agreed to as of the date first written above: BIOCEPT, INC. By: /s/ Xxxxxxx X. Xxxx Sxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Sxxxxx Xxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptArtificial Intelligence Technology Solutions, Inc. 0000 Xxxxx Xxxxx Drive San Diego10000 Xxxxxxx Xxxxxx Xxxxxxxx, CA 92121 AttnXxxxxxxx 00000 ICON Capital Group: Chief Executive Officer and President EmailJC Company: xxxxx@xxxxxxx.xxx SR [Signature Page to Placement Agency Agreement Between BioceptArtificial Intelligence Technology Solutions, Inc., Maxim Group and Icon Capital Group, LLC] ICON Capital Group: JC Company: SR ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to March 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INCSEANERGY MARITIME HOLDINGS CORP. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxx Xxxxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptSeanergy Maritime Holdings Corp. 000 Xxxxxxxxxxxx Xxxxxx 000 00 Xxxxxxx Xxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXxxxxx Attention: Chief Executive Officer and President Legal Department Email: xxxxx@xxxxxxx.xxx Xxxxx@xxxxxxxx.xx [Signature Page to April 2020 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Seanergy Maritime Holdings Corp.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTADIAL PHARMACEUTIALS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxx Title: Chief Executive Officer and President Address for notice: BioceptAdial Pharmaceuticals, Inc. 0000 Xxxxx Xxxxx Drive San DiegoXxxxxxxx Xxxxx, CA 92121 Xxx. 000 Xxxxxxxxxxxxxxx, XX 00000 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx xxxxxxxx@xxxxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptAdial Pharmaceuticals, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ' role in connection therewith in the Placement Agent’s ' marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to April 27, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx Cxxxxxxx X. Xxxxxx Name: Xxxxxxxx Cxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 400 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, ATOSSA GENETICS INC. By: /s/ Xxxxxxx X. Kxxx Xxxx Name: Xxxxxxx X. Kxxx Xxxx Title: Chief Executive Financial Officer and President Address for notice: Biocept100 Xxxxxx Xxxxxx Xxxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 XX 00000 Attn: Chief Executive Officer and President Kxxx Xxxx, CFO Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Atossa Genetics Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ' role in connection therewith in the Placement Agent’s ' marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to June 14, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Director and Head of Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTCOLOR STAR TECHNOLOGY CO., INCLTD. By: /s/ Xxxxxxx X. Xxxx Xx Name: Xxxxxxx X. Xxxx Xx Title: Chief Executive Officer and President Address for notice: Biocept000 0xx Xxx, Inc. Xxxxx 0000 Xxxxx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 XX 00000 Tel: +0 (000) 000-0000 Attn: Chief Executive Officer and President Xxxx Xx Email: xxxxx@xxxxxxx.xxx 00000000@xx.xxx [Signature Page to Placement Agency Agreement Between BioceptColor Star Technology Co., Inc., Ltd. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTBIOLASE, INC. By: /s/ Xxxxxxx Xxxx X. Xxxx Xxxxxx Name: Xxxxxxx Xxxx X. Xxxx Xxxxxx Title: President and Chief Executive Officer and President Address for notice: BioceptBIOLASE, Inc. 0000 00000 Xxxxx Xxxxxx Xxxxx, Xxxxx Drive San Diego000 Xxxx Xxxxxx, CA 92121 XX 00000 Attn: President and Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] xxxxxxx@xxxxxxx.xxx ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent Agents shall, from on and after any Closingthe Closing Date, have the right to reference the Placement and the each Placement Agent’s role in connection therewith in the such Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agents the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC A.G.P./ALLIANCE GLOBAL PARTNERS By: /s/ Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Name: Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Title: Executive Managing DirectorDirector Address for notice: 000 Xxxxxxx Xxxxxx 00xx Xxxxx Xxx Xxxx, Xxx Xxxx 00000 Attn: Xxxxxx Xxxxxxx Email: xxxxxxxx@xxxxxxxxx.xxx CANTOR XXXXXXXXXX & CO By: /s/ Xxxx Xxxxx Name: Xxxx Xxxxx Title: Senior Managing Director and Head of Investment Banking Address for notice: 000 Xxxxxxxxx Xxxx 00xx Xxxxxx Xxx Xxxx, XX 00000 AttentionAttn: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTVILLAGE FARMS INTERNATIONAL, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxx Title: Executive Vice President and Chief Executive Financial Officer and President Address for notice: Biocept0000-00xx Xxxxxx Xxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] ADDENDUM AXxxxxxx Xxxxxxxx

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Cxxxx Xxxxxx Name: Xxxxxxxx X. Cxxxx Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx 300 Xxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Jxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx jxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTRxADE HEALTH, INC. By: /s/ Xxxxxxx X. Xxxx Sxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Sxxxx Xxxxxxxx Title: Chief Executive Officer and President Address for notice: Biocept2000 Xxxxxxxx Xxxxx Xxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx Xxxxxxx 00000 [Signature Page to October 2022 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and TRxADE HEALTH, INC.] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel EmailCounselEmail: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTPAYMENT DATA SYSTEMS, INC. By: /s/ Xxxxxxx Xxxxx X. Xxxx Name: Xxxxxxx Xxxxx X. Xxxx Title: Vice-Chairman & Chief Executive Officer and President Address for notice: Biocept0000 Xxxxxxxx Xxxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego000 Xxx Xxxxxxx, CA 92121 XX 00000 Attn: Chief Executive Officer and President Xxxxx X. Xxxx Email: xxxxx@xxxxxxx.xxx xxxxx.xxxx@xxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptPayment Data Systems, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxxx Xxx, 00xx Xxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. INPIXON By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxx Xxx Title: Chief Executive Officer and President Address for notice: BioceptXxxxx Xxxxx, Inc. 0000 Esq. Xxxxxxxx Xxxxxxxxxx & Xxxxx LLP 000 Xxxxxxx Xxx., 00xx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx XX 00000 xxx@xxx.xxx [Signature Page to March 2022 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Inpixon] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to May 14, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, ,Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to July 6, 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agent the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP SPARTAN CAPITAL SECURITIES, LLC By: /s/ Xxxxxxxx X. Xxxxxx Xxx Xxxxxxx Name: Xxxxxxxx X. Xxxxxx Xxx Xxxxxxx Title: Executive Managing Director, Investment Banking Chief Administrative Officer Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx00 Xxxxxxxx, XX 00000 00xx Xxxxx, New York, NY 10006 Attention: Xxxxx XxxxxxXxxxxxx Xxxxxxxx, General Counsel Director of Investment Banking Email: xxxxxxx@xxxxxxxx.xxx xxxxxxxxx@xxxxxxxxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. 1847 HOLDINGS LLC By: /s/ /e/ Xxxxxx X. Xxxxxxx X. Xxxx Name: Xxxxxx X. Xxxxxxx X. Xxxx Title: Chief Executive Officer and President Address for notice: Biocept1847 Holdings LLC 000 Xxxxxxx Xxxxxx, Inc. 0000 00xx Xxxxx Xxxxx Drive San DiegoNew York, CA 92121 AttnNY 10022 Attention: Xxxxxx X. Xxxxxxx, Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Biocept, Inc., Maxim Group LLC] xxxxxxxx@0000xxxxxxxx.xxx ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from on and after any Closingthe Closing Date, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the Placement Agent the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC A.G.P./ALLIANCE GLOBAL PARTNERS By: /s/ Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Name: Xxxxxxxx Xxxxxx X. Xxxxxx Xxxxxxx Title: Executive Managing Director, Investment Banking Director Address for notice: 000 Xxxxxxxxx Xxxxxxx Xxxxxx Xxx Xxxx00xx Xxxxx New York, XX 00000 AttentionNew York 10022 Attn: Xxxxx Xxxxxx, General Counsel Xxxxxx X. Xxxxxxx Email: xxxxxxx@xxxxxxxx.xxx xxxxxxxx@xxxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTVACCINEX, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxx, Ph.D. Name: Xxxxxxx X. Xxxx Xxxxxxxx, Ph.D. Title: President & Chief Executive Officer and President Address for notice: Biocept, Inc. 0000 Xxxxx Xxxxx Drive San DiegoXxxx Xxxxxx Rochester, CA 92121 New York 14620 Attn: Chief Executive Officer and President Xxxxxxx Xxxxxxxx, Ph.D. Email: xxxxx@xxxxxxx.xxx [Signature Page to Placement Agency Agreement Between Bioceptxxxxxxxxx@xxxxxxxx.xxx Exhibit A President’s List Xxxxxx Xxxxxxxxx, Inc.or any affiliate associated with Xx. Xxxxxxxxx Xxxxxxx Xxxxxxxx, Maxim Group LLC] ADDENDUM APh.D., or any affiliate associated with Xx. Xxxxxxxx

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Co-President Address for notice: 000 Xxxxxxxxx Xxxxxx Xxxx Xxxxxx, 00xx Xxxxx Xxx Xxxx, XX Xxx Xxxx 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTWISA TECHNOLOGIES, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxxxx Name: Xxxxxxx X. Xxxx Xxxxx Xxxxx Title: Chief Executive Officer and President Address for notice: Biocept00000 XX Xxxxxxxxxx Xxxxxxx Xxxxxxxxx, Inc. 0000 Xxxxx Xxxxx Drive San Diego, CA 92121 AttnXxxxxx 00000 Attention: Chief Executive Officer and President EmailE-mail: xxxxx@xxxxxxx.xxx xxxxxx@xxxxxxxxxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptAgreement, dated January 31, 2023, between Maxim Group LLC and WiSA Technologies, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s role in connection therewith in the Placement Agent’s marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel EmailCounselEmail: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTPAYMENT DATA SYSTEMS, INC. By: /s/ Xxxxxxx Xxxxx X. Xxxx Name: Xxxxxxx Xxxxx X. Xxxx Title: Vice-Chairman & Chief Executive Officer and President Address for notice: Biocept00000 Xxx Xxxxx, Inc. 0000 Xxxxx Xxxxx Drive Ste. 120 San DiegoAntonio, CA 92121 TX 78216 Attn: Chief Executive Officer and President Xxxxx X. Xxxx Email: xxxxx@xxxxxxx.xxx xxxxx.xxxx@xxxxxxxxx.xxx [Signature Page to Placement Agency Agreement Between BioceptPayment Data Systems, Inc., Inc. and Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. INPIXON By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxx Xxx Title: Chief Executive Officer and President Address for notice: BioceptXxxxx Xxxxx, Inc. 0000 Esq. Xxxxxxxx Xxxxxxxxxx & Xxxxx LLP 000 Xxxxxxx Xxx., 00xx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx XX 00000 xxx@xxx.xxx [Signature Page to January 2021 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Inpixon] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. INPIXON By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxx Xxx Title: Chief Executive Officer and President Address for notice: BioceptXxxxx Xxxxx, Inc. 0000 Esq. Xxxxxxxx Xxxxxxxxxx & Xxxxx LLP 000 Xxxxxxx Xxx., 00xx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx XX 00000 xxx@xxx.xxx [Signature Page to November 2020 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Inpixon] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPTTOP SHIPS, INC. By: /s/ Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Name: Xxxxxxx X. Xxxx Xxxxxxxxxx Xxxxxxxx Title: Chief Executive Financial Officer and President Address for notice: BioceptTop Ships, Inc. 0000 Xxxxx Xxxxx Drive San Diego1 Vas. Sofias & Meg. Xxxxxxxxxx Xxxxxx 000 00, CA 92121 Attn: Chief Executive Officer and President Xxxxxxxx Xxxxxx, Xxxxxx Email: xxxxx@xxxxxxx.xxx xxxxxxxxx@xxxxxxxx.xxx [Signature Page to April 2020 Placement Agency Agreement Between BioceptMaxim Group LLC and Top Ships, Inc., Maxim Group LLC] ADDENDUM A

PRESS ANNOUNCEMENTS. The Company agrees that the Placement Agent shall, from and after any Closing, have the right to reference the Placement and the Placement Agent’s ’ role in connection therewith in the Placement Agent’s ’ marketing materials and on its website and to place advertisements in financial and other newspapers and journals, in each case at its own expense. [The remainder of this page has been intentionally left blank.] Please confirm that the foregoing correctly sets forth our agreement by signing and returning to Maxim the enclosed copy of this Agreement. Very truly yours, MAXIM GROUP LLC By: /s/ Xxxxxxxx X. Xxxxxx Name: Xxxxxxxx X. Xxxxxx Title: Executive Managing Director, Investment Banking Address for notice: 000 Xxxxxxxxx Xxxxxx Xxx Xxxx, XX 00000 Attention: Xxxxx Xxxxxx, General Counsel Email: xxxxxxx@xxxxxxxx.xxx Accepted and Agreed to as of the date first written above: BIOCEPT, INC. INPIXON By: /s/ Xxxxxxx X. Xxxx Xxxxx Xxx Name: Xxxxxxx X. Xxxx Xxxxx Xxx Title: Chief Executive Officer and President Address for notice: BioceptXxxxx Xxxxx, Inc. 0000 Esq. Xxxxxxxx Xxxxxxxxxx & Xxxxx LLP 000 Xxxxxxx Xxx., 00xx Xxxxx Drive San DiegoXxx Xxxx, CA 92121 Attn: Chief Executive Officer and President Email: xxxxx@xxxxxxx.xxx XX 00000 xxx@xxx.xxx [Signature Page to February 16, 2021 Placement Agency Agreement Between Biocept, Inc., Maxim Group LLCLLC and Inpixon] ADDENDUM A