CGEM insider files Form 144 to sell shares

CGEM-related insider reported proposed sales.

Rhea-AI Filing Summary

CGEM-related insider reported proposed sales. The filing lists multiple proposed and completed dispositions of Common stock, including 10b5-1 sales on 03/05/2026 for 8,000 shares at $125,453.60 and an exercise of stock options to sell 4,000 shares on 05/05/2026. The excerpt also shows 4,000 RSUs dated 02/22/2024.

Key Figures

10b5-1 sale: 8,000 shares 10b5-1 sale: 1,780 shares 10b5-1 sale: 3,601 shares +3 more

6 metrics

10b5-1 sale 8,000 shares 03/05/2026, proceeds $125,453.60

10b5-1 sale 1,780 shares 02/25/2026, proceeds $25,176.14

10b5-1 sale 3,601 shares 02/24/2026, proceeds $52,106.47

Option exercise to be sold 4,000 shares Exercise of Stock Options, 05/05/2026

Restricted Stock Units listed 4,000 RSUs 02/22/2024 listing in securities to be sold

10b5-1 sale 8,000 shares 02/20/2026, proceeds $114,400.00

Key Terms

10b5-1, Restricted Stock Units, Exercise of Stock Options

3 terms

10b5-1 regulatory

"10b5-1 Sales for JENNIFER MICHAELSON One Main Street"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 4000 | 02/22/2024"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Exercise of Stock Options financial

"Exercise of Stock Options | Issuer | 4000 | 05/05/2026"

FAQ

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

What does the Form 144 for CGEM disclose?

It discloses proposed and recent sales of Common stock. The filing lists 10b5-1 sales including 8,000 shares on 03/05/2026 for $125,453.60, plus other dated dispositions and an exercise on 05/05/2026.

Were any sales executed under a 10b5-1 plan in the CGEM filing?

Yes. Several sales are labeled 10b5-1. Examples include 8,000 shares on 03/05/2026 and multiple February 2026 trades listed as 10b5-1 sales in the excerpt.

Does the filing show option exercises or RSU settlements for CGEM?

Yes. The excerpt shows an exercise of stock options to sell 4,000 shares on 05/05/2026. It also lists 4,000 Restricted Stock Units dated 02/22/2024 in the securities-to-be-sold section.

What transaction sizes and proceeds are shown in the excerpt?

Several sale rows include share counts and dollar amounts. For example, 8,000 shares on 03/05/2026 at $125,453.60 and 1,780 shares on 02/25/2026 at $25,176.14 are listed.

Who is listed as the seller in the Form 144 excerpt?

The excerpt names Jennifer Michaelson in multiple sale entries. Sales labeled 10b5-1 and direct entries show her name and an address in Cambridge, MA.

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

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Accepted by SEC EDGAR 05/05/2026 - 04:34 PM EDT 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	122720.00	60526128	05/05/2026	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	05/05/2026	Exercise of Stock Options	Issuer			4000	05/05/2026	Cash
Common	02/22/2024	Restricted Stock Units	Issuer			4000	02/22/2024	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	03/05/2026	8000	125453.60
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

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 02/22/2024 through 12/17/2024.
Date of Notice	05/05/2026
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)