Insider Sophia Schwartz plans NXDR share sale under Rule 144 filing

Rhea-AI Filing Summary

Northern Star Investment Corp. IV insider Sophia Schwartz has filed a notice to sell 23,278 shares of common stock through Morgan Stanley Smith Barney on the NYSE. The planned sale has an aggregate market value of $45,624.88 and is expected to occur on or about 01/16/2026. The notice states that 244,464,136 shares of this class were outstanding.

The shares to be sold were acquired on 01/15/2026 as restricted stock units from the issuer, in the same amount of 23,278 shares. The filing also lists prior Rule 10b5-1 plan sales for Sophia Schwartz in the past three months, including 12,522 shares sold on 01/02/2026 for $25,974.38, 40,000 shares sold on 12/15/2025 for $86,976.00, and 40,000 shares sold on 11/03/2025 for $76,860.00.

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	23278	45624.88	244464136	01/16/2026	NYSE

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	01/15/2026	Restricted Stock Units	Issuer			23278	01/15/2026	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 SOPHIA SCHWARTZ 420 Taylor Street San Francisco CA 94102	Common	01/02/2026	12522	25974.38
10b5-1 Sales for SOPHIA SCHWARTZ 420 Taylor Street San Francisco CA 94102	Common	12/15/2025	40000	86976.00
10b5-1 Sales for SOPHIA SCHWARTZ 420 Taylor Street San Francisco CA 94102	Common	11/03/2025	40000	76860.00

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

How many NXDR shares does Sophia Schwartz plan to sell under this Form 144?

The notice covers the proposed sale of 23,278 shares of common stock, with an aggregate market value of $45,624.88, to be sold through Morgan Stanley Smith Barney.

When are the NXDR shares expected to be sold and on which exchange?

The approximate date of sale is listed as 01/16/2026, and the common shares are to be sold on the NYSE.

How and when did Sophia Schwartz acquire the NXDR shares being sold?

The 23,278 common shares were acquired on 01/15/2026 as restricted stock units from the issuer, with payment also dated 01/15/2026.

What is the total number of NXDR common shares outstanding noted in the filing?

The filing states that there are 244,464,136 common shares outstanding for this class of securities.

What NXDR stock sales has Sophia Schwartz made in the last three months?

The filing lists Rule 10b5-1 sales: 12,522 shares on 01/02/2026 for $25,974.38, 40,000 shares on 12/15/2025 for $86,976.00, and 40,000 shares on 11/03/2025 for $76,860.00.

Which broker is handling Sophia Schwartz’s planned NXDR share sale?

The filing identifies Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, as the broker for the planned sale.