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FibroBiologics CSO buys 298K shares, warrants

FibroBiologics’ chief scientific officer bought stock and received matching long-dated warrants in a private placement, increasing his direct ownership.

(Very High)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

FibroBiologics, Inc. (FBLG) reported that Chief Scientific Officer Hamid Khoja acquired 298,508 shares of common stock on September 15, 2026 at $1.675 per share in a private placement, together with warrants to purchase up to 298,508 additional shares at an exercise price of $1.55 per share, exercisable until September 15, 2031. Following these awards, he holds 301,571 shares of common stock directly, along with 298,508 warrants.

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Insider Khoja Hamid
Role Chief Scientific Officer
Type Security Shares Price Value
Grant/Award Warrant (Right to Buy) F1, F2, F3 298,508 -- --
Grant/Award Common Stock F1, F2 298,508 $1.675 $500K
Holdings After Transaction: Warrant (Right to Buy) — 298,508 contracts (Direct); Common Stock — 301,571 shares (Direct)
Footnotes (3)
  1. F1. On September 15, 2026, the reporting person entered into a securities purchase agreement with FibroBiologics, Inc. (the "Company") to purchase 298,508 shares of the Company's common stock, par value $0.00001 per share (the "Common Stock"), and accompanying warrants to purchase up to 298,508 shares of Common Stock (the "Warrants"), in a private placement (the "Offering").
  2. F2. Each share of Common Stock and accompanying Warrant were issued at a combined purchase price of $1.675.
  3. F3. The warrants are exercisable at any time until they expire.
Common stock acquired 298,508 shares Shares of FibroBiologics common stock acquired on September 15, 2026
Acquisition price per share plus warrant $1.675 Combined purchase price for each share of common stock and accompanying warrant
Warrants acquired 298,508 warrants Warrants to purchase common stock acquired in the private placement
Warrant exercise price $1.55 per share Exercise price for the common stock underlying the warrants
Warrant expiration date September 15, 2031 Date the reported warrants expire
Common shares held after transaction 301,571 shares Direct FibroBiologics common stock holdings following the acquisition
Reporting person role Chief Scientific Officer Officer title of reporting person Hamid Khoja at FibroBiologics
securities purchase agreement financial
"the reporting person entered into a securities purchase agreement with FibroBiologics, Inc."
A securities purchase agreement is a written contract between a buyer and a seller outlining the terms for buying or selling financial assets such as stocks or bonds. It specifies details like the price, quantity, and conditions of the transaction, similar to a shopping list with agreed-upon terms. For investors, it provides clarity and legal protection when transferring ownership of these financial instruments.
private placement financial
"shares of Common Stock and Warrants... in a private placement (the "Offering")"
A private placement is a sale of securities directly to a selected group of investors, typically institutions or accredited investors, instead of through a public offering. It lets a company raise money faster and with fewer regulatory steps; for existing shareholders it matters because the newly issued shares, often sold at a discount, increase the share count and can dilute their ownership.
warrants financial
"accompanying warrants to purchase up to 298,508 shares of Common Stock"
Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.

FAQ

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

What insider transactions did FBLG’s chief scientific officer report on this Form 4?

Hamid Khoja reported acquiring 298,508 shares of FibroBiologics common stock and 298,508 warrants to buy additional shares on September 15, 2026 under a securities purchase agreement in a private placement.

At what prices were the FBLG securities acquired in this filing?

Each share of FibroBiologics common stock and accompanying warrant was issued at a combined purchase price of $1.675. The warrants have an exercise price of $1.55 per share for the underlying common stock.

How many FBLG shares does Hamid Khoja own after these transactions?

After the reported acquisition, Hamid Khoja directly holds 301,571 shares of FibroBiologics common stock, plus 298,508 warrants to purchase additional shares, as disclosed in the Form 4.

What are the key terms of the FBLG warrants reported in this Form 4?

The reported warrants permit purchase of up to 298,508 FibroBiologics common shares at an exercise price of $1.55 per share and are exercisable at any time until they expire on September 15, 2031.

Was this FBLG insider transaction under a Rule 10b5-1 trading plan?

The filing indicates no Rule 10b5-1 plan for these transactions, as the relevant checkbox is not marked and the footnotes describe a negotiated securities purchase agreement and private placement instead.

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*
Khoja Hamid

(Last)(First)(Middle)
C/O FIBROBIOLOGICS, INC.
9350 KIRBY DRIVE., SUITE 300

(Street)
HOUSTON TEXAS 77054

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
FibroBiologics, Inc. [ FBLG ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Scientific Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026
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
Common Stock09/15/2026A(1)298,508A$1.675(2)301,571D
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
Warrant (Right to Buy)$1.5509/15/2026A(1)298,508 (3)09/15/2031Common Stock298,508(2)298,508D
Explanation of Responses:
1. On September 15, 2026, the reporting person entered into a securities purchase agreement with FibroBiologics, Inc. (the "Company") to purchase 298,508 shares of the Company's common stock, par value $0.00001 per share (the "Common Stock"), and accompanying warrants to purchase up to 298,508 shares of Common Stock (the "Warrants"), in a private placement (the "Offering").
2. Each share of Common Stock and accompanying Warrant were issued at a combined purchase price of $1.675.
3. The warrants are exercisable at any time until they expire.
Remarks:
Exhibit 24 Power of Attorney
/s/ Ruben A. Garcia, by Power of Attorney09/15/2026
** 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)

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