Century Therapeutics officer plans 534-share sale

An officer of Century Therapeutics filed a Rule 144 notice to sell 534 IPSC shares, partly to cover taxes from a vested equity award.

Rhea-AI Filing Summary

Century Therapeutics, Inc. (IPSC) has a notice of proposed sale of common stock under Rule 144 by officer Gregory Russotti. The notice covers the planned sale of 534 shares of common stock through Fidelity Brokerage Services LLC on NASDAQ. The filer also reports prior sales in the last three months, and notes that the transaction includes shares sold to satisfy a tax obligation arising from the settlement of a vested equity award.

Key Figures

Shares proposed to be sold: 534 shares Aggregate market value of proposed sale: $1,094.43 Shares sold June 8, 2026: 524 shares +4 more

7 metrics

Shares proposed to be sold 534 shares Rule 144 sale of Century Therapeutics, Inc. common stock

Aggregate market value of proposed sale $1,094.43 Value listed for 534 IPSC shares in the Rule 144 notice

Shares sold June 8, 2026 524 shares Prior IPSC common stock sale reported in last three months

Proceeds June 8, 2026 sale $1,106.01 Aggregate amount for 524 IPSC shares sold June 8, 2026

Shares sold June 12, 2026 2,584 shares Second IPSC common stock sale reported in last three months

Proceeds June 12, 2026 sale $5,767.75 Aggregate amount for 2,584 IPSC shares sold June 12, 2026

Date of Rule 144 notice September 8, 2026 Date the Form 144 notice was filed

Key Terms

Rule 144, Restricted Stock Vesting, vested equity award, attorney-in-fact

4 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 | 09/04/2026 | 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 financial

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

attorney-in-fact regulatory

"as attorney-in-fact for Gregory Russotti"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

What insider transaction did IPSC disclose in this Form 144 filing?

The filing reports a proposed Rule 144 sale by officer Gregory Russotti of 534 shares of Century Therapeutics, Inc. common stock through Fidelity Brokerage Services LLC on NASDAQ, with part of the sale intended to cover taxes from a vested equity award.

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

The notice covers a proposed sale of 534 shares of Century Therapeutics, Inc. common stock. These shares are to be sold through Fidelity Brokerage Services LLC, with the sale reported under Rule 144 for resales of restricted or control securities.

What is the stated value of the IPSC shares in the proposed Rule 144 sale?

The Form 144 lists an aggregate market value of $1,094.43 for the 534 shares of Century Therapeutics, Inc. common stock proposed to be sold through Fidelity Brokerage Services LLC on NASDAQ.

What prior IPSC share sales by Gregory Russotti are reported in the last three months?

The filing reports that Gregory Russotti sold 524 shares of IPSC common stock on June 8, 2026 for $1,106.01 and 2,584 shares on June 12, 2026 for $5,767.75 over the preceding three months.

Why does the IPSC Form 144 say some shares are being sold?

The remarks state that the sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution, indicating part of the transaction is to satisfy related tax liabilities.

Who is executing the proposed IPSC share sale on behalf of the officer?

The notice is signed by Jennifer Ruchti as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for officer Gregory Russotti in connection with the Rule 144 sale.

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

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Available on EDGAR 09/08/2026 - 03:11 PM Accepted by SEC EDGAR 09/08/2026 - 03:10 PM Learn about SEC filing dates

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	534	1094.43	181075321	09/08/2026	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	09/04/2026	Restricted Stock Vesting	Issuer			534	09/04/2026	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	06/08/2026	524	1106.01
Gregory Russotti 25 N 38th Street 12th Floor Philadelphia PA 19104	Common	06/12/2026	2584	5767.75

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	09/08/2026
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/ Jennifer Ruchti, 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)