Retension COO Bisson converts preferred shares

Each preferred share converted automatically into one common share immediately before the IPO closed, without payment of consideration.

Rhea-AI Filing Summary

Retension Pharmaceuticals, Inc. Chief Operating Officer Sabine Bisson reported that on October 13, 2026, 1,611 shares of Series A Convertible Preferred Stock and 2,504 shares of Series B Convertible Preferred Stock converted automatically into the same respective numbers of common shares immediately before the issuer’s initial public offering closed. The conversions were made without payment of consideration. The reported remaining balance of each preferred-stock series after conversion was 0 shares.

Insider Trade Summary

4,115 shares exercised/converted

Exercise 4 txns

Insider Bisson Sabine

Role CHIEF OPERATING OFFICER

Type	Security	Shares	Price	Value
Conversion	Series A Convertible Preferred Stock F1	1,611	--	--
Conversion	Series B Convertible Preferred Stock F2	2,504	--	--
Conversion	Common Stock F1	1,611	--	--
Conversion	Common Stock F2	2,504	--	--

Holdings After Transaction: Series A Convertible Preferred Stock — 0 contracts (Direct); Series B Convertible Preferred Stock — 0 contracts (Direct); Common Stock — 4,115 shares (Direct)

Footnotes (2)

1. F1. Each share of Series A Convertible Preferred Stock (the "Series A Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series A Preferred Stock had no expiration date.
2. F2. Each share of Series B Convertible Preferred Stock (the "Series B Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock had no expiration date.

Key Figures

Series A Convertible Preferred Stock converted: 1,611 shares Series B Convertible Preferred Stock converted: 2,504 shares Series A Convertible Preferred Stock following conversion: 0 shares +1 more

4 metrics

Series A Convertible Preferred Stock converted 1,611 shares October 13, 2026

Series B Convertible Preferred Stock converted 2,504 shares October 13, 2026

Series A Convertible Preferred Stock following conversion 0 shares Reported balance after the October 13, 2026 transaction

Series B Convertible Preferred Stock following conversion 0 shares Reported balance after the October 13, 2026 transaction

Key Terms

Series A Convertible Preferred Stock, Series B Convertible Preferred Stock, initial public offering

3 terms

Series A Convertible Preferred Stock financial

"Each share of Series A Convertible Preferred Stock"

Series A convertible preferred stock is a class of shares sold in an early funding round that gives investors a mix of protection and upside: it pays a priority claim over common shares if the company is sold or closes, but can be converted into ordinary shares to share in future growth. Think of it like a hybrid between a safer stake and a ticket to ownership; it matters to investors because it affects who controls the company, how future gains are split, and how much their investment is protected from downside.

Series B Convertible Preferred Stock financial

"Each share of Series B Convertible Preferred Stock"

Series B convertible preferred stock is a class of shares sold during a later-stage private financing that combines features of a loan and common stock: it usually pays priority dividends or has a priority claim if the company is sold, and it can be converted into common shares under predefined rules. Investors care because these shares affect ownership stakes and payout order—like having a reserved place in line and a ticket that can turn into regular ownership—so they influence potential returns and dilution for other shareholders.

initial public offering financial

"immediately prior to the closing of the Issuer's initial public offering"

An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.

FAQ

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

How many preferred shares did RTSN COO Sabine Bisson convert?

Sabine Bisson converted 1,611 shares of Series A Convertible Preferred Stock and 2,504 shares of Series B Convertible Preferred Stock into the same respective numbers of common shares on October 13, 2026.

Did Sabine Bisson pay for the RTSN preferred-stock conversion?

No consideration was paid. Each preferred share converted automatically into one common share immediately before the closing of the issuer’s initial public offering.

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

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Available on EDGAR 10/13/2026 - 08:14 PM EDT Accepted by SEC EDGAR 10/13/2026 - 06:11 PM EDT Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Bisson Sabine

(Last) (First) (Middle)

1104 WEST BROAD STREET

SUITE 1029

(Street)

FALLS CHURCH VIRGINIA 22046

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Retension Pharmaceuticals, Inc. [ RTSN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/13/2026

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

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

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

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	10/13/2026		C		1,611	A	(1)	1,611	D
Common Stock	10/13/2026		C		2,504	A	(2)	4,115	D

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
Series A Convertible Preferred Stock	(1)	10/13/2026		C			1,611	(1)	(1)	Common Stock	1,611	(1)	0	D
Series B Convertible Preferred Stock	(2)	10/13/2026		C			2,504	(2)	(2)	Common Stock	2,504	(2)	0	D

Explanation of Responses:

1. Each share of Series A Convertible Preferred Stock (the "Series A Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series A Preferred Stock had no expiration date.

2. Each share of Series B Convertible Preferred Stock (the "Series B Preferred Stock") converted automatically into one share of Common Stock immediately prior to the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock had no expiration date.

	/s/ Alex Schwartz, Attorney-in-fact	10/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)