Material Agreement, Financial Obligation (Form 8-K)

May 2026 Bridge Note

On May 8, 2026, Harvard Apparatus Regenerative Technology, Inc. (the "Company") entered into a loan arrangement with Junli He, the Chairman and Chief Executive Officer of the Company (the "Lender"), pursuant to which the Lender agreed to loan the Company an aggregate amount of $200,000 as evidenced by a Bridge Note executed by the Company in favor of, and accepted by, the Lender (the "May Bridge Note").

The May Bridge Note accrues interest at an annual fixed rate of 8%, calculated on the basis of the actual number of days elapsed in a 360-day year, and the principal amount thereof will be due and payable in full, together with all accrued and unpaid interest thereon, on the earlier to occur of (a) the closing date (or later date of capital being provided pertaining to such continued offering that the following threshold is tripped) of the Company's next capital raise that includes gross proceeds of at least $5,000,000 or (b) May 8, 2027. In the event the Company issues equity securities in a transaction or series of related transactions resulting in aggregate gross proceeds to the Company of at least $200,000, excluding the indebtedness evidenced by the May Bridge Note, on or before the maturity date, the outstanding balance of the May Bridge Note (all principal and accrued interest) may be converted, at the Lender's option, into such equity securities at the per unit price paid by the purchasers in such financing. The May Bridge Note contains covenants and provides for certain events of default, including if the Company fails to pay when due any amount owed thereunder, fails to comply with any agreement, covenant, condition, provision or term contained therein, and other customary events of default. The Company may prepay the May Bridge Note at any time without penalty or premium.

July 2026 Bridge Note

On July 16, 2026, the Company entered into a further loan arrangement with the Lender, pursuant to which the Lender agreed to loan the Company an aggregate amount of $200,000 as evidenced by a Bridge Note executed by the Company in favor of, and accepted by, the Lender (the "July Bridge Note" and, together with the May Bridge Note, the "Bridge Notes").

The July Bridge Note accrues interest at an annual fixed rate of 8%, calculated on the basis of the actual number of days elapsed in a 360-day year, and the principal amount thereof will be due and payable in full, together with all accrued and unpaid interest thereon, on the earlier to occur of (a) the closing date (or later date of capital being provided pertaining to such continued offering that the following threshold is tripped) of the Company's next capital raise that includes gross proceeds of at least $5,000,000 or (b) July 16, 2027. In the event the Company issues equity securities in a transaction or series of related transactions resulting in aggregate gross proceeds to the Company of at least $200,000, excluding the indebtedness evidenced by the July Bridge Note, on or before the maturity date, the outstanding balance of the July Bridge Note (all principal and accrued interest) may be converted, at the Lender's option, into such equity securities at the per unit price paid by the purchasers in such financing. The July Bridge Note contains covenants and provides for certain events of default, including if the Company fails to pay when due any amount owed thereunder, fails to comply with any agreement, covenant, condition, provision or term contained therein, and other customary events of default. The Company may prepay the July Bridge Note at any time without penalty or premium.

Because Mr. He is the Chairman and Chief Executive Officer of the Company, each of the Bridge Notes constitutes a related party transaction. The terms of the Bridge Notes were reviewed and approved by the disinterested members of the Board of Directors of the Company (the "Board").

As of the date of this Amendment, the aggregate principal amount outstanding under the Bridge Notes is $400,000.

The foregoing descriptions of the May Bridge Note and the July Bridge Note do not purport to be complete and are qualified in their entirety by reference to the full text of such documents, copies of which are filed as Exhibits 10.1 and 10.2, respectively, to this Current Report on Form 8-K and are incorporated herein by reference.

The information set forth in Item 1.01 of this Current Report on Form 8-K with respect to the May Bridge Note and the July Bridge Note is incorporated by reference into this Item 2.03.