Century Therapeutics officer to sell 2,587 shares

An officer of Century Therapeutics plans a Rule 144 sale of recently vested restricted shares, partly to cover related tax obligations.

Available on EDGAR 09/14/2026 - 03:32 PM EDT Accepted by SEC EDGAR 09/14/2026 - 03:31 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Century Therapeutics, Inc. (IPSC) received a notice that officer Gregory Russotti intends to sell up to 2,587 shares of common stock under Rule 144, with an indicated aggregate market value of $4,994.20 as of September 14, 2026. The shares arise from restricted stock vesting treated as compensation from the issuer on September 11, 2026. A prior sale of 534 shares of common stock for $1,094.43 during the past three months is also reported, and the planned sale is stated to include an amount necessary to cover a tax obligation from settlement of the vested equity award.

Key Figures

Shares proposed for sale: 2,587 shares Aggregate market value of proposed sale: $4,994.20 Shares sold in prior 3 months: 534 shares +2 more

5 metrics

Shares proposed for sale 2,587 shares Common stock to be sold under Rule 144, as of September 14, 2026

Aggregate market value of proposed sale $4,994.20 Indicated for the 2,587 shares of common stock to be sold

Shares sold in prior 3 months 534 shares Common stock sold on September 8, 2026

Proceeds from prior 3‑month sale $1,094.43 Total for 534 shares of common stock sold on September 8, 2026

Notice date September 14, 2026 Date of Rule 144 notice filed for proposed sale

Key Terms

Rule 144, Restricted Stock Vesting, vested equity award distribution

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 09/11/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

vested equity award distribution financial

"resulting from the settlement of a vested equity award distribution."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for Century Therapeutics (IPSC)?

It discloses that officer Gregory Russotti plans to sell up to 2,587 shares of Century Therapeutics common stock under Rule 144, related to a restricted stock vesting event on September 11, 2026, with an indicated aggregate market value of $4,994.20.

How many IPSC shares are proposed to be sold under this Rule 144 notice?

The notice covers a proposed sale of up to 2,587 shares of Century Therapeutics common stock, with an indicated aggregate market value of $4,994.20 as of September 14, 2026, to be sold on NASDAQ through Fidelity Brokerage Services LLC.

What is the origin of the IPSC shares to be sold by Gregory Russotti?

The 2,587 shares of Century Therapeutics common stock to be sold are tied to restricted stock vesting dated September 11, 2026, and are characterized as arising from compensation provided by the issuer.

Were any Century Therapeutics (IPSC) shares sold by this person in the last three months?

Yes. Over the past three months, 534 shares of Century Therapeutics common stock were sold on September 8, 2026, for total proceeds of $1,094.43, according to the Form 144 disclosure for Gregory Russotti.

Why does the Form 144 say some IPSC shares will be sold to cover taxes?

The remarks state that the planned sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution for Gregory Russotti.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001867305
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Century Therapeutics, Inc.
SEC File Number	001-40498
Address of Issuer	25 N 38TH STREET, 12TH FLOOR PHILADELPHIA PENNSYLVANIA 19104
Phone	215-981-4000
Name of Person for Whose Account the Securities are To Be Sold	Russotti Gregory
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	2587	4994.20	181075321	09/14/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/11/2026	Restricted Stock Vesting	Issuer			2587	09/11/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Gregory Russotti 25 N 38th Street 12th Floor Philadelphia PA 19104	Common	09/08/2026	534	1094.43

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/14/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Joshua Schmitt, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Gregory Russotti.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)