Harvard Ave Acquisition Corporation (the Company) (a Cayman Islands exempted company) SHARE TRANSFER

Exhibit 10.12

Harvard Ave Acquisition Corporation

(the Company)

(a Cayman Islands exempted company)

SHARE TRANSFER

▇▇▇▇▇▇ Square Sponsor Limited of ▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇.▇. Box 10240, Grand Cayman KY1-1002, ▇▇▇▇▇▇ Town, Cayman Islands (the Transferor), for good and valuable consideration received by us from ▇▇▇▇▇▇ Square LLC of ▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, P.O. ▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇-▇▇▇▇, ▇▇▇▇▇▇ Town, Cayman Islands (the Transferee), hereby transfers to the Transferee 6,680,000 Ordinary Class B Shares of USD0.0001 nominal or par value standing in our name in the Register of Members of the Company, free of any liens, encumbrances or other restrictions thereon.

This Share Transfer is governed by Cayman Islands law.

Executed on behalf of	)	/s/ ▇▇▇▇▇▇ ▇▇▇▇
▇▇▇▇▇▇ Square Sponsor Limited	)
by an authorised signatory	)	Name:
on August 14, 2025		(Authorised Signatory)