Common use of Authority of Representatives Clause in Contracts

Authority of Representatives. Any action by the Underwriters hereunder may be taken by the Representatives on behalf of the Underwriters, and any such action taken by the Representatives shall be binding upon the Underwriters. If the foregoing is in accordance with your understanding, please indicate your acceptance of this Agreement by signing in the space provided below. Very truly yours, KALA PHARMACEUTICALS, INC. By: /s/ Xxxx Xxxxxxx Name: Xxxx Xxxxxxx Title: Chief Financial Officer Accepted: As of the date first written above X.X. XXXXXX SECURITIES LLC XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED JEFFERIES LLC For themselves and on behalf of the several Underwriters listed in Schedule 1 hereto. X.X. Xxxxxx Securities LLC By: /s/ Xxxxx Ke Name: Xxxxx Ke Title: Executive Director Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated By: /s/ Xxxxxx Xxxxxx Name: Xxxxxx Xxxxxx Title: Managing Director Jefferies LLC By: /s/ Xxxxxxx Xxxxxx Name: Xxxxxxx Xxxxxx Title: Senior Vice President Schedule 1 Underwriter Number of Shares X.X. Xxxxxx Securities LLC 2,625,000 Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated 1,875,000 Jefferies LLC 1,500,000 Cantor Xxxxxxxxxx & Co. 750,000 Wedbush Securities Inc. 450,000 Xxxxxxxxxxx & Co. Inc. 300,000 Total 7,500,000 Annex A

Authority of Representatives. Any action by the Underwriters hereunder may be taken by the Representatives on behalf of the Underwriters, and any such action taken by the Representatives shall be binding upon the Underwriters. If the foregoing is in accordance with your understanding, please indicate your acceptance of this Agreement by signing in the space provided below. Very truly yours, KALA CONSTELLATION PHARMACEUTICALS, INC. By: /s/ Xxxx Xxxxxxx Xxxxx Name: Xxxx Xxxxxxx Xxxxx Title: Chief Financial Officer Accepted: As of the date first written above X.X. XXXXXX SECURITIES LLC XXXXXXX LYNCHXXXXXXXXX LLC XXXXX AND COMPANY, PIERCELLC RBC CAPITAL MARKETS, XXXXXX & XXXXX INCORPORATED JEFFERIES LLC For themselves and on behalf of the several Underwriters listed in Schedule 1 hereto. X.X. Xxxxxx Securities LLC By: /s/ Xxxxx Ke Name: Xxxxx Ke Title: Executive Director Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated Xxxxxxxxx LLC By: /s/ Xxxxxx Xxxx Xxx Name: Xxxx Xxx Title: Managing Director Xxxxx and Company, LLC By: /s/ Xxxx Xxxxx Name: Xxxx Xxxxx Title: Managing Director RBC Capital Markets, LLC By: /s/ Xxxxxxxx Xxxxxx Name: Xxxxxx Xxxxxxxx Xxxxxx Title: Managing Director Jefferies LLC By: /s/ Xxxxxxx Xxxxxx Name: Xxxxxxx Xxxxxx Title: Senior Vice President Schedule 1 Underwriter Number of Shares X.X. Xxxxxx Securities LLC 2,625,000 Xxxxxxx Lynch1,980,000 Xxxxxxxxx LLC 1,210,000 Xxxxx and Company, PierceLLC 1,045,000 RBC Capital Markets, LLC 550,000 SunTrust Xxxxxxxx Xxxxxxxx, Inc. 385,000 Xxxxxx & X. Xxxxx Incorporated 1,875,000 Jefferies LLC 1,500,000 Cantor Xxxxxxxxxx & Co. 750,000 Wedbush Securities Inc. 450,000 Xxxxxxxxxxx & Co. Inc. 300,000 Incorporated 330,000 Total 7,500,000 5,500,000 Annex A

Authority of Representatives. Any action by the Underwriters hereunder may be taken by the Representatives on behalf of the Underwriters, and any such action taken by the Representatives shall be binding upon the Underwriters. If the foregoing is in accordance with your understanding, please indicate your acceptance of this Agreement by signing in the space provided below. Very truly yours, KALA PHARMACEUTICALSESPERION THERAPEUTICS, INC. By: /s/ Xxxx Xxxxxxx Xxx Xxxxxxxx Name: Xxxx Xxxxxxx Xxx Xxxxxxxx Title: Chief Financial Officer President and CEO Accepted: As of the date first written above X.X. XXXXXX CREDIT SUISSE SECURITIES (USA) LLC XXXXXXX LYNCHRBC CAPITAL MARKETS, PIERCE, XXXXXX & XXXXX INCORPORATED JEFFERIES LLC UBS SECURITIES LLC For themselves and on behalf of the several Underwriters listed in Schedule 1 hereto. X.X. Xxxxxx Securities CREDIT SUISSE SECURITIES (USA) LLC By: /s/ Xxxxx Ke Xxxx Xxxx Name: Xxxxx Ke Title: Executive Director Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated By: /s/ Xxxxxx Xxxxxx Name: Xxxxxx Xxxxxx Xxxx Xxxx Title: Managing Director Jefferies By: /s/ Xxxx Xxxxx Name: Xxxx Xxxxx Title: Director RBC CAPITAL MARKETS, LLC By: /s/ Xxxxxxx Xxx Xxxxxxxxx Name: Xxx Xxxxxxxxx Title: Director UBS SECURITIES LLC By: /s/ Xxxx Xxxxxx Name: Xxxxxxx Xxxx Xxxxxx Title: Senior Vice President Associate Director, Healthcare Schedule 1 Underwriter Number of Shares X.X. Xxxxxx Credit Suisse Securities (USA) LLC 612,500 RBC Capital Markets, LLC 350,000 UBS Securities LLC 2,625,000 262,500 JMP Securities LLC 210,000 Xxxxxx, Xxxxxxxx & Company, Incorporated 157,500 Xxxxxxx Lynch& Company, Pierce, Xxxxxx & Xxxxx Incorporated 1,875,000 Jefferies LLC 1,500,000 Cantor Xxxxxxxxxx & Co. 750,000 Wedbush Securities Inc. 450,000 Xxxxxxxxxxx & Co. Inc. 300,000 157,500 Total 7,500,000 1,750,000 Annex A

Authority of Representatives. Any action by the Underwriters hereunder may be taken by the Representatives on behalf of the Underwriters, and any such action taken by the Representatives shall be binding upon the Underwriters. If the foregoing is in accordance with your understanding, please indicate your acceptance of this Agreement by signing in the space provided below. Very truly yours, KALA PHARMACEUTICALSESPERION THERAPEUTICS, INC. By: /s/ Xxxx Xxxxxxx Xxx Xxxxxxxx Name: Xxxx Xxxxxxx Xxx Xxxxxxxx Title: Chief Financial Officer President and CEO Accepted: As of the date first written above X.X. XXXXXX XXXXXXXXX LLC XXXXX AND COMPANY, LLC UBS SECURITIES LLC XXXXXXX LYNCH, PIERCE, XXXXXX & XXXXX INCORPORATED JEFFERIES LLC For themselves and on behalf of the several Underwriters listed in Schedule 1 hereto. X.X. XXXXXXXXX LLC By: /s/ Xxxx Xxx Name: Xxxx Xxx Title: Managing Director Xxxxx and Company, LLC By: /s/ Xxxxx Xxxxxx Name: Xxxxx Xxxxxx Title: Managing Director UBS Securities LLC By: /s/ Xxxxx Ke Xxxxxxx Name: Xxxxx Ke Xxxxxxx Title: Executive Director Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated By: /s/ Xxxxxx Xxxxxx Xxxxx Xxxx Name: Xxxxxx Xxxxxx Xxxxx Xxxx Title: Managing Associate Director Jefferies LLC By: /s/ Xxxxxxx Xxxxxx Name: Xxxxxxx Xxxxxx Title: Senior Vice President Schedule 1 Underwriter Number of Shares X.X. Xxxxxx Xxxxxxxxx LLC 1,162,500 Xxxxx and Company, LLC 806,000 UBS Securities LLC 2,625,000 542,500 JMP Securities LLC 217,000 Xxxxxx, Xxxxxxxx & Company, Incorporated 217,000 Xxxxxxx Lynch& Company, Pierce, Xxxxxx & Xxxxx Incorporated 1,875,000 Jefferies LLC 1,500,000 Cantor Xxxxxxxxxx & Co. 750,000 Wedbush Securities Inc. 450,000 Xxxxxxxxxxx & Co. Inc. 300,000 155,000 Total 7,500,000 3,100,000 Annex A