FibroBiologics, Inc. (FBLG) - Dilution Analysis

Visualizing historical and potential share dilution over time

Dilution Analysis

High Risk
Significant dilution risk
Last updated: May 06, 2026

Risk Assessment Details

Potential Dilution: 6.71% of current shares
Recent Dilution: 2003.3% (2 years)
Historical Dilution Factor: significant recent dilution
Outstanding Shares
5.2M
Potential Supply
350K
Additional shares possible
Splits
1 Split 1 Reverse
Past 2 years

Summary

FBLG currently has 5.21M outstanding shares. with limited dilution risk as only 349K additional shares (6.7%) are authorized for issuance. The company has significantly diluted shareholders by 2003.3% over the past 2 years, indicating aggressive capital raising. Recent corporate actions include 1 stock split (positive for accessibility) and 1 reverse split (concerning signal).

Share Structure Timeline

Outstanding Shares
Total Supply

Historical Data Points

Date Event Outstanding Supply
May 06, 2026

8-K filing: FibroBiologics, Inc. has sold 71,830 shares of common stock under an At The Market Offering Agreement with H.C. Wainwright & Co., LLC, with the potential to sell up to $7,500,000 worth of shares.

5.2M 350K
Apr 30, 2026

10-Q filing | 5.2M shares outstanding

5.2M 350K
Apr 02, 2026

8-K filing: FibroBiologics, Inc. closed a public offering of common stock, pre-funded warrants, and warrants, generating net proceeds of approximately $2.5 million. ($1.36M proceeds)

3.5M 110M
Mar 30, 2026
Stock Split

8-K filing: Stock split 1-for-20 | Outstanding: 3,512,845 → 175,642

180K 5.4M
Mar 27, 2026

S-1 filing: FibroBiologics, Inc. is offering up to 1,136,363 shares of common stock together with warrants to purchase up to 1,136,363 shares of common stock, up to 1,136,363 pre-funded warrants to purchase common stock, and placement agent warrants to purchase up to 79,545 shares of common stock.

3.5M 110M
Dec 23, 2025

S-1 filing: This prospectus relates to the registration of the resale or other disposition, from time to time, of up to 22,494,434 shares of our common stock by the selling stockholders.

51M 60M
Dec 15, 2025

8-K filing: FibroBiologics, Inc. entered into a securities purchase agreement to issue and sell 5,227,275 shares of common stock at $0.33 per share in a registered direct offering, along with warrants to purchase an equal number of shares, with gross proceeds expected to be approximately $1.7 million. ($1.72M proceeds)

51M 37M
Nov 25, 2025

8-K filing: FibroBiologics, Inc. entered into a securities purchase agreement to sell 4,477,614 shares of common stock at $0.335 per share in a registered direct offering, and will issue warrants to purchase 4,477,614 shares of common stock in a concurrent private placement. ($3.0M proceeds)

51M 37M
Nov 19, 2025

8-K filing: FibroBiologics, Inc. enters into a securities purchase agreement for a registered direct offering of common stock and pre-funded warrants, along with a concurrent private placement of warrants, using sovereign-issued gold coins as payment. ($4.0M proceeds)

51M 37M
Oct 31, 2025

10-Q filing | 51.5M shares outstanding

51M 37M
Jul 18, 2025

8-K filing: FibroBiologics, Inc. issued a total of 2,154,530 shares of its common stock to YA II PN, Ltd. between June 20, 2025 and July 15, 2025, upon conversion of convertible promissory notes.

37M 52M
Jun 16, 2025

8-K filing: FibroBiologics, Inc. issued a $5 million convertible promissory note to YA II PN, Ltd. as the third tranche of a Standby Equity Purchase Agreement. Additionally, the Investor converted portions of the Second Note, resulting in the issuance of several tranches of common stock to the investor between January 23, 2025, and June 3, 2025. ($4.7M proceeds)

37M 52M
May 14, 2025

10-Q filing | 36.7M shares outstanding

37M 52M
Mar 31, 2025

10-K filing | 37.7M shares outstanding

38M 51M
Feb 07, 2025

8-K filing: FibroBiologics, Inc. issued shares of common stock to YA II PN, LTD. upon conversion of promissory notes. ($0.25M proceeds)

36M 52M
Feb 03, 2025

S-3 filing: FibroBiologics, Inc. may offer and sell from time to time our common stock, preferred stock, depositary shares, warrants, subscription rights, contingent value rights, debt securities and purchase contracts, as well as units that include any of these securities with an aggregate initial offering price of $50,000,000.

36M 52M
Jan 17, 2025

POS AM filing: Post-Effective Amendment No. 1 to the Registration Statement is being filed to terminate the effectiveness of the Registration Statement and to remove from registration all securities registered but not sold under the Registration Statement.

34M 55M
Jan 10, 2025

S-1/A filing: Registration of resale of common stock by YA II PN, LTD, and potential sales of common stock to Yorkville pursuant to a standby equity purchase agreement.

34M 56M
Dec 30, 2024

S-1 filing: The filing is an S-1 registration statement for the resale of common stock by YA II PN, LTD (Yorkville) and the potential sale of common stock to Yorkville pursuant to a standby equity purchase agreement (SEPA) for up to $25,000,000.

34M 45M
Dec 20, 2024

8-K filing: FibroBiologics, Inc. sold 1,152,074 shares of Common Stock to GEM at a price of $2.17 per share for an aggregate purchase price of $2.5 million on December 19, 2024. ($2.5M proceeds)

34M 3.5M
Nov 12, 2024

10-Q filing | 33.5M shares outstanding

34M 3.5M
Aug 27, 2024

8-K filing: FibroBiologics, Inc. sold 100,000 shares of common stock to GEM Global Yield LLC SCS at a net price of $4.51 per share, resulting in gross proceeds of $451,000. ($0.45M proceeds)

33M 4.3M
Aug 13, 2024

POS AM filing: Post-Effective Amendment No. 1 to the Registration Statement is being filed to terminate the effectiveness of the Registration Statement and to remove from registration all securities registered but not sold under the Registration Statement.

33M 4.3M
Aug 07, 2024

10-Q filing | 32.7M shares outstanding

33M 4.4M
Jun 18, 2024

S-1 filing: This S-1 filing registers shares of common stock that may be sold to GEM pursuant to the GEM SPA. The filing assumes a minimum purchase price of $6.06 per share.

34M 4.4M
Jun 04, 2024

S-1/A filing: FibroBiologics, Inc. is offering up to 1,742,160 units, each consisting of one share of common stock and one warrant to purchase one share of common stock, with the warrants having an exercise price of $11.48 and exercisable for five years.

34M 4.4M
May 15, 2024

S-1/A filing: FibroBiologics, Inc. is offering up to 1,801,801 units, each consisting of one share of common stock and one warrant to purchase one share of common stock, as well as up to 1,801,801 shares of common stock underlying the warrants.

35M 4.5M
May 14, 2024

10-Q filing | 31.1M shares outstanding

31M 2.7M
Apr 26, 2024

S-1 filing: FibroBiologics, Inc. is offering up to 1,801,801 units, each consisting of one share of common stock and one warrant to purchase one share of common stock.

35M 2.7M
Mar 26, 2024

S-1/A filing: This is an S-1/A filing. The company has commenced listing its common stock on Nasdaq as of January 31, 2024. They have issued shares of Series B and B-1 Preferred Stock in private placements and crowdfunded offerings. In February and March 2024, they issued common stock to GEM pursuant to a draw-down notice.

33M 910K
Feb 29, 2024

10-K filing | 32.6M shares outstanding

33M 10K
Jan 24, 2024

S-1/A filing: This is an S-1/A filing. The document discusses the issuance of Series B-1 Preferred Stock and warrants to purchase common stock in private placements.

N/A 10K
Jan 24, 2024

S-1/A filing: The filing relates to the registration statement, exhibits, and financial statement schedules. It also mentions private placements of Series B-1 Preferred Stock and warrants to purchase common stock.

N/A 10K
Jan 22, 2024

S-1/A filing: The Company shall deliver a warrant to Maxim to purchase shares of the Company's Common Stock equal to four percent (4.0%) of the number of shares of Common Stock underlying the securities issued in the Financing.

N/A 10K
Jan 12, 2024

S-1/A filing: This is an S-1/A filing. The document discusses the issuance of Series B-1 Preferred Stock and warrants to purchase common stock in private placements and to investors who subscribed to purchase shares of Series B-1 Preferred Stock.

N/A 10K
Dec 07, 2023

S-1/A filing: This S-1/A filing details the issuance of Series B-1 Preferred Stock and warrants to purchase common stock in private placements from April 2023 through November 2023.

N/A 10K
Dec 04, 2023

S-1/A filing: This is an S-1/A filing. It details the issuance of Series B-1 Preferred Stock and warrants to purchase common stock in private placements and to investors.

N/A 10K
Nov 30, 2023

S-1/A filing: This is an S-1/A filing related to the registration of Common Stock or other equity securities.

N/A 8.9K
Nov 28, 2023

S-1/A filing: This is an S-1/A filing related to the registration of securities. It includes details of previously issued Series B-1 Preferred Stock and warrants.

N/A 8.9K
Nov 07, 2023

S-1 filing: This is an S-1 filing for a potential offering. From April 2023 through September 2023, the company issued an aggregate of the equivalent of 74,922 shares of Series B-1 Preferred Stock to investors in a private placement, at prices ranging from $18.00 to $20.00 per share. They also agreed to issue warrants, exercisable for a period of three years, to purchase an aggregate of 8,890 shares of common stock at an exercise price of $20.00 per share.

N/A 8.9K
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