CGEM insider plans sale of 30,000 shares

A shareholder of the company with symbol CGEM has indicated an intent to sell 30,000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services on August 13, 2026 on NASDAQ, in connection with a cash exercise of stock options.

Rhea-AI Filing Summary

A shareholder of the company with symbol CGEM has indicated an intent to sell 30,000 shares of common stock through Morgan Stanley Smith Barney LLC Executive Financial Services on August 13, 2026 on NASDAQ, in connection with a cash exercise of stock options. The disclosure also lists prior 10b5-1 sales for Jennifer Michaelson of 8,000 shares of common stock on July 6, 2026 for $142,586.

Key Figures

Shares planned for sale: 30,000 shares Planned sale value: $588,000.00 Prior 10b5-1 sale shares: 8,000 shares +3 more

6 metrics

Shares planned for sale 30,000 shares Common stock to be sold on 08/13/2026

Planned sale value $588,000.00 Aggregate value for 30,000 shares of common stock

Prior 10b5-1 sale shares 8,000 shares Common stock sold on 07/06/2026 under 10b5-1 sales

Prior 10b5-1 sale value $142,586.00 Proceeds from 8,000-share sale on 07/06/2026

Planned sale date 08/13/2026 Date for sale of 30,000 common shares

Prior sale date 07/06/2026 Date of 8,000-share 10b5-1 sale

Key Terms

Exercise of Stock Options, 10b5-1 Sales, Executive Financial Services

3 terms

Exercise of Stock Options financial

"Common | 08/13/2026 | Exercise of Stock Options | Issuer"

10b5-1 Sales financial

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

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

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

What share sale is being planned for CGEM in this Form 144 disclosure?

The disclosure indicates an intended sale of 30,000 shares of CGEM common stock on August 13, 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services, related to a cash exercise of stock options and to be sold on NASDAQ.

What is the reported aggregate value of CGEM shares planned for sale?

The filing reports an aggregate value of $588,000.00 for the 30,000 CGEM common shares intended for sale. This figure reflects the total value associated with the proposed transaction as disclosed in the securities information section.

What prior CGEM share sales are disclosed for Jennifer Michaelson?

The document lists prior 10b5-1 sales for Jennifer Michaelson of 8,000 CGEM common shares on July 6, 2026 for $142,586.00. These transactions are reported as securities sold during the past three months.

On which market are the CGEM shares expected to be sold?

The planned sale of 30,000 CGEM common shares is listed as occurring on NASDAQ. This applies to the shares associated with the stock option exercise scheduled for August 13, 2026, as disclosed in the securities information section.

How are the CGEM shares being acquired before the planned sale?

The planned disposition of 30,000 CGEM shares is tied to an Exercise of Stock Options by the issuer, with the consideration specified as cash. The option exercise date is disclosed as August 13, 2026.

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

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Accepted by SEC EDGAR 08/13/2026 - 04:33 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	30000	588000.00	64354694	08/13/2026	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	08/13/2026	Exercise of Stock Options	Issuer			30000	08/13/2026	Cash

* 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	07/06/2026	8000	142586.00

144: Remarks and Signature

Remarks
Date of Notice	08/13/2026
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)