Jennifer Michaelson proposes sale of 8,000 shares (CGEM)

Rhea-AI Filing Summary

Jennifer Michaelson proposes sale of 8,000 common shares. The filing lists 8,000 shares to be sold on 02/20/2026 via an exercise of stock options with cash consideration. The record also lists prior 10b5-1 sales totaling multiple transactions in 2025–2026.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	111040.00	59076259	02/20/2026	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	02/20/2026	Exercise of Stock Options	Issuer			8000	02/20/2026	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
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
10b5-1 Sales for JENNIFER MICHAELSON One Main Street Suite 1350 Cambridge MA 02142	Common	11/24/2025	4000	49200.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 for CGEM report?

The filing reports a proposed sale of 8,000 common shares on 02/20/2026 by exercise of stock options, listing cash as the consideration. It also documents prior 10b5-1 sales by Jennifer Michaelson in 2025–2026.

Who is named in the Form 144 and what broker is listed?

The filing names Jennifer Michaelson as the reporting person and lists Morgan Stanley Smith Barney LLC as the broker. The broker’s address and a NASDAQ listing are shown alongside the proposed 8,000-share sale on 02/20/2026.

What prior transactions are disclosed in the Form 144?

The filing discloses multiple prior 10b5-1 sales by Jennifer Michaelson, including transactions of 4,000 shares on 01/22/2026 and 4,000 on 11/24/2025, plus smaller sales in 12/2025 and 02/12/2026, with listed dollar amounts.

How is the proposed sale being effected and what proceeds type is shown?

The proposed 8,000-share sale is shown as an exercise of stock options and the filing lists cash as the method of consideration. The entry associates the sale with the issuer and a transaction date of 02/20/2026.