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Gossamer Bio EVP granted 2.9M options at $0.18

Gossamer Bio, Inc. (GOSS) reported that executive officer Christian Waage, EVP, Tech Ops and Admin, received a grant of stock options covering 2,900,026 shares of common stock at an exercise price of $0.175 per share.

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Form Type
4

Rhea-AI Filing Summary

Gossamer Bio, Inc. (GOSS) reported that executive officer Christian Waage, EVP, Tech Ops and Admin, received a grant of stock options covering 2,900,026 shares of common stock at an exercise price of $0.175 per share. The options expire on 2036-08-23 and vest based on future milestones and service conditions tied to FDA approval of seralutinib or, if approval is delayed, over time following the second anniversary of the grant date.

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Insider Christian Waage
Role EVP, Tech Ops and Admin
Type Security Shares Price Value
Grant/Award Stock Option (Right to Buy) F1 2,900,026 $0.00 $0.00
Holdings After Transaction: Stock Option (Right to Buy) — 2,900,026 contracts (Direct)
Footnotes (1)
  1. F1. 50% of the total number of shares subject to the option will vest upon FDA approval of seralutinib, and 1/24th of the remaining 50% of the total number of shares subject to the option will vest on the last day of each one-month period after such FDA approval, in each case subject to the Reporting Person's continuous service to the Issuer on each such vesting date. To the extent FDA approval of seralutinib does not occur on or prior to the date that is two years following the grant date of the option, 1/24th of the total number of shares subject to the option will vest on the last day of each one-month period following the date that is two years following the grant date of the option, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.
Stock options granted 2,900,026 option shares Grant of Stock Option (Right to Buy) reported for 2026-08-24
Exercise price $0.175 per share Conversion or exercise price for the stock option grant
Total option shares following transaction 2,900,026 option shares Total derivative holdings after the reported grant
Option expiration date 2036-08-23 Expiration date of the reported stock option award
Initial vesting on FDA approval 50% of option shares Vests upon FDA approval of seralutinib, subject to continuous service
Subsequent vesting installments 1/24 of remaining 50% monthly Vests on last day of each one-month period after FDA approval or, if no approval within two years, after the two-year date
Stock Option (Right to Buy) financial
"security_title: Stock Option (Right to Buy)"
exercise price financial
"conversion_or_exercise_price: "0.1750""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"shares subject to the option will vest upon FDA approval"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
FDA approval medical
"will vest upon FDA approval of seralutinib"
FDA approval is the U.S. Food and Drug Administration’s formal authorization for a drug, vaccine, or medical device to be marketed and sold after reviewers determine it meets standards for safety and effectiveness. For investors it’s a pivotal milestone because it opens the door to legal, large-scale sales and can sharply boost revenue potential while reducing regulatory uncertainty—like receiving a safety certificate that lets a new bridge carry traffic and tolls.
continuous service financial
"subject to the Reporting Person's continuous service to the Issuer"

FAQ

What insider transaction did GOSS disclose for Christian Waage?

Gossamer Bio disclosed that Christian Waage, EVP, Tech Ops and Admin, received a grant of 2,900,026 stock options to purchase common stock, reported as an acquisition under transaction code A. The options were granted at an exercise price of $0.175 per share.

What is the exercise price of the new GOSS stock options granted to Christian Waage?

The granted stock options have an exercise price of $0.175 per share. Each option allows the purchase of one share of Gossamer Bio common stock at this price, subject to the vesting conditions described in the award footnote.

How many GOSS shares are covered by Christian Waage’s new stock option award?

The stock option award to Christian Waage covers 2,900,026 shares of Gossamer Bio common stock. Following the grant, the Form 4 reports total derivative holdings for this option position of 2,900,026 option shares.

When do Christian Waage’s GOSS stock options expire?

The stock options granted to Christian Waage expire on 2036-08-23. They remain exercisable until that expiration date, subject to earlier termination under their terms and to the vesting conditions tied to FDA approval milestones and continued service.

What are the vesting conditions for the new GOSS stock options tied to seralutinib?

The footnote states that 50% of the option shares vest upon FDA approval of seralutinib. The remaining 50% then vests in 24 equal monthly installments. If FDA approval has not occurred within two years of grant, vesting instead occurs in 24 equal monthly installments starting two years after grant, in each case subject to continuous service.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Christian Waage

(Last)(First)(Middle)
3115 MERRYFIELD ROW, SUITE 120

(Street)
SAN DIEGO CALIFORNIA 92121

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Gossamer Bio, Inc. [ GOSS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP, Tech Ops and Admin
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/24/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$0.17508/24/2026A2,900,026 (1)08/23/2036Common Stock2,900,026$02,900,026D
Explanation of Responses:
1. 50% of the total number of shares subject to the option will vest upon FDA approval of seralutinib, and 1/24th of the remaining 50% of the total number of shares subject to the option will vest on the last day of each one-month period after such FDA approval, in each case subject to the Reporting Person's continuous service to the Issuer on each such vesting date. To the extent FDA approval of seralutinib does not occur on or prior to the date that is two years following the grant date of the option, 1/24th of the total number of shares subject to the option will vest on the last day of each one-month period following the date that is two years following the grant date of the option, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.
Remarks:
/s/ Jeff Boerneke, Attorney-in-Fact08/25/2026
** 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 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)