Jennifer Michaelson files Form 144 for proposed share sales

Jennifer Michaelson reported Form 144 proposed sales of Common shares.

Rhea-AI Filing Summary

Jennifer Michaelson reported Form 144 proposed sales of Common shares. The filing lists an exercise of stock options for 4,000 shares dated 03/05/2026 and 4,000 Restricted Stock Units dated 12/11/2024.

The excerpt also itemizes multiple 10b5-1 sale transactions by Ms. Michaelson during late 2025 and early 2026, including 8,000 shares on 02/20/2026, 4,000 shares on 01/22/2026, and smaller lots on various dates with dollar amounts shown.

Insights

Equity Compensation Analyst

Form 144 lists option exercise and scheduled insider sales under a 10b5-1 plan.

The filing records an exercise of stock options for 4,000 shares on 03/05/2026 and 4,000 Restricted Stock Units dated 12/11/2024, alongside multiple 10b5-1 sales in late 2025 and early 2026. The excerpt shows specific sell lots (for example, 8,000 shares on 02/20/2026).

Cash-flow treatment is identified per-line by the reported proceeds for each sale; broader impact depends on total holdings and company context not provided here. Subsequent filings may disclose additional quantities or finalize transactions.

FAQ

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

What does CGEM Form 144 say about Jennifer Michaelson's transactions?

It reports proposed sales of Common shares and recent 10b5-1 sales. The filing lists an option exercise of 4,000 shares on 03/05/2026 and multiple 10b5-1 sale lots in late 2025 and early 2026 with per‑trade proceeds shown.

How many shares were exercised or issued to Jennifer Michaelson per the filing?

The excerpt shows 4,000 shares exercised and 4,000 Restricted Stock Units. The exercise is dated 03/05/2026 and the RSUs carry the date 12/11/2024 as listed in the filing.

Which 10b5-1 sale volumes are shown in the CGEM excerpt?

The filing lists multiple 10b5-1 sale lots, including 8,000 shares on 02/20/2026, 4,000 shares on 01/22/2026, and several smaller transactions between December 2025 and February 2026, each with the reported proceeds.

Do the Form 144 entries show dollar proceeds for the sales?

Yes; each 10b5-1 sale line in the excerpt includes reported proceeds for that lot. Examples include $114,400.00 for 8,000 shares on 02/20/2026 and $49,200.00 for 4,000 shares on 01/22/2026.

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

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Accepted by SEC EDGAR 03/05/2026 - 04:31 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	0001838061
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	CULLINAN THERAPEUTICS, INC.
SEC File Number	001-39856
Address of Issuer	One Main Street Suite 1350 Cambridge MASSACHUSETTS 02142
Phone	6174104650
Name of Person for Whose Account the Securities are To Be Sold	JENNIFER MICHAELSON
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	8000	130400.00	59076259	03/05/2026	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	03/05/2026	Exercise of Stock Options	Issuer			4000	03/05/2026	Cash
Common	12/11/2024	Restricted Stock Units	Issuer			4000	12/11/2024	N/A

* 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
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/25/2026	1780	25176.14
JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/24/2026	3601	52106.47
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/23/2026	1752	24515.56
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/20/2026	8000	114400.00
JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/20/2026	3742	50966.04
JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	02/12/2026	416	5004.48
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	01/22/2026	4000	49200.00
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	12/19/2025	1345	13458.34
JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	12/18/2025	2898	28023.66
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	12/15/2025	995	11840.50
JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	12/12/2025	2148	26592.24

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 12/11/2024 through 12/17/2024.
Date of Notice	03/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/07/2025
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 Michaelson
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)