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Jasper Therapeutics (JSPR) COO discloses merger-converted option stakes

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Form Type
3

Rhea-AI Filing Summary

Jasper Therapeutics’ Chief Operating Officer Matthew E. Ros reports initial derivative holdings tied to Kira Pharmaceuticals’ merger into a Jasper subsidiary. He holds options to buy 103,204 shares of Jasper voting common stock at $0.0100 per share and options linked to 92,278 shares of non-voting convertible preferred stock at $0.6100 per share, received in exchange for 622,456 former Kira options and vesting monthly over 48 months. Each preferred share is automatically convertible into 61 voting common shares after stockholder approval of the conversion, subject to a beneficial ownership cap between 4.9% and 19.9%.

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Insider Ros Matthew E
Role Chief Operating Officer
Type Security Shares Price Value
holding Stock Option (Right to Buy) F1, F2, F3 -- -- --
holding Stock Options (Right to Buy) F1, F2, F3, F4 -- -- --
Holdings After Transaction: Stock Option (Right to Buy) — 103,204 shares (Direct); Stock Options (Right to Buy) — 92,278 shares (Direct)
Footnotes (4)
  1. F1. Pursuant to the Agreement and Plan of Merger by and among Kira Pharmaceuticals ("Kira"), Jasper Therapeutics, Inc. ("Jasper") and Kira Holdco Inc. ("Merger Sub"), a wholly owned subsidiary of Jasper, dated July 16, 2026 (the "Merger Agreement"), Kira merged with and into Merger Sub, with Merger Sub surviving (the "Merger"). Each option to purchase shares of Kira ordinary shares (each, a "Kira Option") that was outstanding and unexercised immediately prior to the closing of the Merger, whether or not vested, was converted into and became an option to purchase Jasper's voting common stock, par value $0.0001 per share ("Voting Common Stock") and shares of the Jasper Non-Voting Convertible Preferred Stock, par value $0.0001 ("Preferred Stock") pursuant to the terms and conditions of the Merger Agreement.
  2. F2. Beginning on June 7, 2026, the option vests in equal monthly installments over 48 months, subject to the Reporting Person's continued service to Issuer through each vesting date.
  3. F3. Pursuant to the Merger Agreement, the Reporting Person received 103, 204 options to purchase shares of Voting Common Stock and 92,278 options to purchase shares of Preferred Stock in exchange for 622,456 Kira Options.
  4. F4. On the third business day following the receipt of stockholder approval of the conversion of the Preferred Stock, each share of preferred stock shall automatically convert into 61 shares of the Issuer's Voting Common Stock, subject to certain limitations, including that a holder of Preferred Stock is prohibited from converting shares of preferred stock into shares of Voting Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than a specified percentage (to be established by the holder between 4.9% and 19.9%) of the total number of shares of Voting Common Stock issued and outstanding immediately after giving effect to such conversion. The Preferred Stock has no expiration date.
Voting common stock options 103,204 shares Options to purchase Jasper voting common stock at $0.0100 per share
Non-voting preferred stock options 92,278 shares Options to purchase Jasper Non Voting Convertible Preferred Stock at $0.6100 per share
Exchanged Kira options 622,456 options Former Kira options exchanged for Jasper options under the Merger Agreement
Vesting period 48 months Options vest in equal monthly installments beginning June 7, 2026
Preferred conversion ratio 61 Each Preferred Stock share converts into 61 Voting Common Stock shares after stockholder approval
Beneficial ownership cap range 4.9%–19.9% Holder may set a cap on beneficial ownership when converting Preferred Stock
Agreement and Plan of Merger regulatory
"Pursuant to the Agreement and Plan of Merger by and among Kira Pharmaceuticals..."
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
Non Voting Convertible Preferred Stock financial
"...shares of the Jasper Non-Voting Convertible Preferred Stock, par value $0.0001..."
par value financial
"...Voting Common Stock, par value $0.0001 per share..."
Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.
beneficially own regulatory
"...would beneficially own more than a specified percentage..."
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

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

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FAQ

What insider holdings did Jasper Therapeutics (JSPR) COO Matthew Ros report?

Matthew E. Ros reported options over 103,204 Jasper voting common shares at $0.0100 per share and options linked to 92,278 non-voting convertible preferred shares at $0.6100 per share, all held directly after the Kira Pharmaceuticals merger.

How were Matthew Ros’s options in Jasper Therapeutics (JSPR) created from the Kira merger?

Under the Kira–Jasper merger agreement, Matthew Ros received 103,204 voting common stock options and 92,278 preferred stock options in exchange for 622,456 Kira options, preserving his economic position through newly issued Jasper derivative securities.

What are the vesting terms of Matthew Ros’s options at Jasper Therapeutics (JSPR)?

Beginning on June 7, 2026, Matthew Ros’s options vest in equal monthly installments over 48 months, conditioned on his continued service to Jasper Therapeutics through each vesting date, which spreads his ability to exercise these options over four years.

How does Jasper Therapeutics (JSPR) preferred stock held via options convert into common shares?

Each share of Jasper non-voting convertible preferred stock is automatically convertible into 61 voting common shares on the third business day after stockholder approval of the conversion, subject to limits on how much the holder may beneficially own.

What beneficial ownership limits apply to converting Jasper Therapeutics (JSPR) preferred stock?

Upon conversion, a preferred holder cannot beneficially own more than a chosen cap between 4.9% and 19.9% of Jasper’s voting common stock outstanding, restricting how many common shares can be received in any conversion event.

Does Jasper Therapeutics (JSPR) preferred stock reported by Matthew Ros expire?

The non-voting convertible preferred stock referenced in Matthew Ros’s option holdings has no expiration date, meaning the preferred shares, once issued, remain outstanding unless converted or otherwise disposed of under their terms.
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
Ros Matthew E

(Last)(First)(Middle)
C/O JASPER THERAPEUTICS, INC.
2200 BRIDGE PKWY, SUITE #102

(Street)
REDWOOD CITY CALIFORNIA 94065

(City)(State)(Zip)

UNITED STATES

(Country)
2. Date of Event Requiring Statement (Month/Day/Year)
07/16/2026
3. Issuer Name and Ticker or Trading Symbol
Jasper Therapeutics, Inc. [ JSPR ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Operating Officer
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy) (1)(2)(3) (1)(2)(3)Voting Common Stock103,204$0.01D
Stock Options (Right to Buy) (1)(2)(3)(4) (1)(2)(3)(4)Non Voting Convertible Preferred Stock92,278$0.61D
Explanation of Responses:
1. Pursuant to the Agreement and Plan of Merger by and among Kira Pharmaceuticals ("Kira"), Jasper Therapeutics, Inc. ("Jasper") and Kira Holdco Inc. ("Merger Sub"), a wholly owned subsidiary of Jasper, dated July 16, 2026 (the "Merger Agreement"), Kira merged with and into Merger Sub, with Merger Sub surviving (the "Merger"). Each option to purchase shares of Kira ordinary shares (each, a "Kira Option") that was outstanding and unexercised immediately prior to the closing of the Merger, whether or not vested, was converted into and became an option to purchase Jasper's voting common stock, par value $0.0001 per share ("Voting Common Stock") and shares of the Jasper Non-Voting Convertible Preferred Stock, par value $0.0001 ("Preferred Stock") pursuant to the terms and conditions of the Merger Agreement.
2. Beginning on June 7, 2026, the option vests in equal monthly installments over 48 months, subject to the Reporting Person's continued service to Issuer through each vesting date.
3. Pursuant to the Merger Agreement, the Reporting Person received 103, 204 options to purchase shares of Voting Common Stock and 92,278 options to purchase shares of Preferred Stock in exchange for 622,456 Kira Options.
4. On the third business day following the receipt of stockholder approval of the conversion of the Preferred Stock, each share of preferred stock shall automatically convert into 61 shares of the Issuer's Voting Common Stock, subject to certain limitations, including that a holder of Preferred Stock is prohibited from converting shares of preferred stock into shares of Voting Common Stock if, as a result of such conversion, such holder, together with its affiliates, would beneficially own more than a specified percentage (to be established by the holder between 4.9% and 19.9%) of the total number of shares of Voting Common Stock issued and outstanding immediately after giving effect to such conversion. The Preferred Stock has no expiration date.
Remarks:
Exhibit 24 - Power of Attorney
/s/ Herb Cross, as Attorney-in-Fact07/22/2026
** Signature of Reporting PersonDate
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 5 (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 3: SEC 1473 (03-26)