[Form 4] Rein Therapeutics, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Rein Therapeutics, Inc. (RNTX) reported insider buying by a 10% owner group. On 11/14/2025, entities affiliated with Voss Capital reported purchasing 104,183 shares of Rein Therapeutics common stock at a weighted average price of $1.2247 per share, with individual trades ranging from $1.1800 to $1.2500. Following this transaction, Voss Value Master Fund, LP is shown as beneficially owning 926,441 shares indirectly, and Voss Value-Oriented Special Situations Fund, LP is shown as beneficially owning 500,000 shares indirectly. The reporting persons state that, as a group, they beneficially own over 10% of Rein Therapeutics’ outstanding common stock and each disclaims beneficial ownership beyond its pecuniary interest.

Insights

Equity ownership & insider transactions analyst

Affiliated Voss funds increased their reported RNTX holdings through open‑market purchases.

The filing shows that Voss-affiliated entities, already part of a group beneficially owning over 10% of Rein Therapeutics common stock, bought additional shares on 11/14/2025. One transaction involved 104,183 common shares at a weighted average price of $1.2247, executed through multiple trades in a range from $1.1800 to $1.2500. After this activity, Voss Value Master Fund, LP reports 926,441 shares held indirectly, while Voss Value-Oriented Special Situations Fund, LP reports 500,000 shares held indirectly.

The structure clarifies that the positions are held via funds, with Voss Advisors GP, LLC and Voss Capital, LP in general partner and investment manager roles, and Travis W. Cocke as managing member. Each reporting person expressly disclaims beneficial ownership beyond its economic interest, which is typical language in such group filings. Future ownership levels and any additional transactions, if reported in subsequent Forms 4 or Schedules 13D/G, would further outline how this stake evolves over time.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Voss Capital, LP

(Last) (First) (Middle)

3773 RICHMOND AVENUE

SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Rein Therapeutics, Inc. [ RNTX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/14/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $0.001 par value(1)	11/14/2025		P		104,183	A	$1.2247(4)	926,441	I	By: Voss Value Master Fund, L.P.(2)
Common Stock, $0.001 par value(1)								500,000	I	By: Voss Value-Oriented Special Situations Fund, L.P.(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

Voss Capital, LP

(Last) (First) (Middle)

3773 RICHMOND AVENUE

SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Voss Value Master Fund, LP

(Last) (First) (Middle)

3773 RICHMOND AVENUE, SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Voss Value-Oriented Special Situations Fund, LP

(Last) (First) (Middle)

3773 RICHMOND AVENUE

SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Voss Advisors GP, LLC

(Last) (First) (Middle)

3773 RICHMOND AVENUE, SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Cocke Travis W.

(Last) (First) (Middle)

3773 RICHMOND AVENUE, SUITE 850

(Street)

HOUSTON TX 77046

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. This Form 4 is filed jointly by Voss Value Master Fund, LP ("Voss Value Master Fund"), Voss Value-Oriented Special Situations Fund, LP ("Voss Value-Oriented Special Situations Fund"), Voss Advisors GP, LLC ("Voss GP"), Voss Capital, LP ("Voss Capital") and Travis W. Cocke (collectively, the "Reporting Persons"). Each of the Reporting Persons is a member of a group for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended, that collectively beneficially owns over 10% of the Issuer's outstanding shares of Common Stock. Each Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

2. Securities owned directly by Voss Value Master Fund. Voss GP, as the general partner of Voss Value Master Fund, may be deemed to beneficially own the securities owned directly by Voss Value Master Fund. Voss Capital, as the investment manager of Voss Value Master Fund, may be deemed to beneficially own the securities owned directly by Voss Value Master Fund. Mr. Cocke, as the managing member of Voss Capital and Voss GP, may be deemed to beneficially own the securities owned directly by Voss Value Master Fund.

3. Securities owned directly by Voss Value-Oriented Special Situations Fund. Voss GP, as the general partner of Voss Value-Oriented Special Situations Fund, may be deemed to beneficially own the securities owned directly by Voss Value-Oriented Special Situations Fund. Voss Capital, as the investment manager of Voss Value-Oriented Special Situations Fund, may be deemed to beneficially own the securities owned directly by Voss Value-Oriented Special Situations Fund. Mr. Cocke, as the managing member of Voss Capital and Voss GP, may be deemed to beneficially own the securities owned directly by Voss Value-Oriented Special Situations Fund.

4. Represents a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.1800 to $1.2500, inclusive. The Reporting Persons undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

	Voss Capital, LP; By: /s/ Travis W. Cocke, Managing Member	11/18/2025
	Voss Value Master Fund, LP; By: Voss Advisors GP, LLC; By: /s/ Travis W. Cocke, Managing Member	11/18/2025
	Voss Value-Oriented Special Situations Fund, LP; By: Voss Advisors GP, LLC; By: /s/ Travis W. Cocke, Managing Member	11/18/2025
	Voss Advisors GP, LLC; By: /s/ Travis W. Cocke, Managing Member	11/18/2025
	/s/ Travis W. Cocke	11/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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