Fortress Biotech, Inc. (FBIO) Ownership
FBIO ownership summary
as of October 18, 2026- Institutions
- 31.2% of shares outstanding
- Insiders
- 23.90% of shares outstanding
- Shares outstanding
- 33.4M
- Float
- 21.4M shares available to trade
- Short interest
- 19.00% 4.9M shares short
- Days to cover
- 17.93 short interest down 4.1% vs prior month
- Institutions 31.22%
- Insiders 23.90%
- Other investors 44.88%
FBIO top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 3.11% | 1.0M | $1.9M | +71,173 (+7.4%) | June 30, 2026 |
| 2 | Opaleye Management Inc | 2.67% | 890K | $1.7M | −152,000 (−14.6%) | June 30, 2026 |
| 3 | Mackenzie Investments | 1.67% | 556K | $1.0M | +555,676 (0.0%) | June 30, 2026 |
| 4 | GSA Capital Partners LLP | 1.37% | 458K | $857,343 | +204,338 (+80.4%) | June 30, 2026 |
| 5 | Shikiar Asset Management Inc | 0.92% | 305K | $571,227 | — | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 0.90% | 301K | $561,974 | +10,266 (+3.5%) | June 30, 2026 |
| 7 | BlackRock Inc | 0.67% | 225K | $420,342 | +27,697 (+14.1%) | June 30, 2026 |
| 8 | Two Sigma Investments LLC | 0.64% | 214K | $399,780 | +16,961 (+8.6%) | June 30, 2026 |
| 9 | Bridgeway Capital Management, LLC | 0.53% | 177K | $331,678 | −5,000 (−2.7%) | June 30, 2026 |
| 10 | Vanguard Fiduciary Trust Co | 0.50% | 166K | $311,114 | +23,836 (+16.7%) | June 30, 2026 |
| 11 | HB Wealth Management, LLC | 0.35% | 117K | $218,182 | −3,500 (−2.9%) | June 30, 2026 |
| 12 | Kestra Advisory Services, LLC | 0.35% | 116K | $217,359 | −13,566 (−10.5%) | June 30, 2026 |
| 13 | Acadian Asset Management LLC | 0.32% | 107K | $200,657 | +66,853 (+165.3%) | June 30, 2026 |
| 14 | State Street Corp | 0.30% | 102K | $189,994 | — | June 30, 2026 |
| 15 | The Goldman Sachs Group Inc | 0.29% | 96K | $180,189 | +96,358 (0.0%) | June 30, 2026 |
| 16 | Renaissance Technologies Corp | 0.26% | 86K | $161,549 | −13,200 (−13.3%) | June 30, 2026 |
| 17 | Citadel Advisors Llc | 0.23% | 77K | $144,112 | −103,224 (−57.3%) | June 30, 2026 |
| 18 | Integrated Quantitative Investments LLC | 0.21% | 69K | $128,454 | +68,692 (0.0%) | June 30, 2026 |
| 19 | Panagora Asset Management Inc | 0.20% | 66K | $123,467 | +9,357 (+16.5%) | June 30, 2026 |
| 20 | Northern Trust Corp | 0.19% | 64K | $118,992 | −166,421 (−72.3%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 1.2M shares and 7 cut 457K.
FBIO top mutual fund and ETF holders
18 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.09% | 698K | $1.3M | — | August 31, 2026 |
| 2 | Bridgeway Ultra-Small Company | 0.46% | 152K | $284,928 | −30,000 (−16.5%) | June 30, 2026 |
| 3 | Fidelity Extended Market Index | 0.43% | 142K | $266,322 | −765 (−0.5%) | August 31, 2026 |
| 4 | Mackenzie GQE US Small Cap F8 | 0.41% | 137K | $255,696 | +2,000 (+1.5%) | July 31, 2026 |
| 5 | iShares Micro-Cap ETF | 0.25% | 84K | $157,235 | −580 (−0.7%) | September 30, 2026 |
| 6 | Fidelity Total Market Index | 0.15% | 49K | $92,228 | — | August 31, 2026 |
| 7 | Fidelity Series Total Market Index | 0.12% | 41K | $77,010 | +5,308 (+14.8%) | August 31, 2026 |
| 8 | EA Bridgeway Omni Small-Cap Value ETF | 0.07% | 25K | $46,750 | — | September 30, 2026 |
| 9 | Fidelity Nasdaq Composite Index | 0.06% | 19K | $34,688 | — | August 31, 2026 |
| 10 | LL GLOBAL SMALL-MID CAP GRO 75/100 (FF) | 0.06% | 18K | $34,350 | +18,369 (0.0%) | June 30, 2026 |
| 11 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.05% | 18K | $33,755 | — | August 31, 2026 |
| 12 | Vanguard U.S. Eq Idx £ Acc | 0.04% | 13K | $23,521 | — | August 31, 2026 |
| 13 | Vanguard Balanced Index Inv | 0.03% | 10K | $19,177 | — | August 31, 2026 |
| 14 | IG Mackenzie GQE U.S. Sm Md Cap Eq C NL | 0.02% | 7,560 | $14,137 | −32,727 (−81.2%) | July 31, 2026 |
| 15 | Nomura Healthcare Fund Class I | 0.02% | 6,666 | $12,465 | — | August 31, 2026 |
| 16 | 1290 VT Micro Cap K | 0.02% | 5,933 | $11,095 | — | August 31, 2026 |
| 17 | Avantis US Small Cap Equity ETF | 0.01% | 2,971 | $5,556 | — | September 30, 2026 |
| 18 | GW GBL SM-MID CAP GROW 100/100 DSC (EGB) | 0.01% | 2,841 | $5,313 | +2,841 (0.0%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
FBIO insider transactions
latest 12| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-09-23 | Lindsay A Md Rosenwald | Buy | $1.84 | 763,359 | $1.4M |
| 2024-07-11 | Lindsay A Md Rosenwald | Buy | $7.48 | 5,000 | $37,400 |
| 2024-07-10 | David Jin | Buy | $7.50 | 500 | $3,750 |
| 2024-07-08 | Lindsay A Md Rosenwald | Buy | $7.35 | 5,000 | $36,750 |
| 2024-06-28 | Lindsay A Md Rosenwald | Buy | $1.64 | 20,000 | $32,800 |
| 2024-05-20 | Dov Klein | Sell | $1.89 | 10,000 | $18,900 |
| 2024-05-16 | Lindsay A Md Rosenwald | Buy | $1.76 | 10,000 | $17,600 |
| 2024-01-05 | Lindsay A Md Rosenwald | Buy | $2.38 | 50,000 | $119,000 |
| 2023-11-14 | Lindsay A Md Rosenwald | Buy | $1.70 | 1,567,515 | $2.7M |
| 2023-11-14 | Michael S Weiss | Buy | $1.70 | 147,058 | $249,999 |
| 2023-09-26 | Lindsay A Md Rosenwald | Buy | $4.20 | 6,666 | $27,997 |
| 2023-08-17 | Lindsay A Md Rosenwald | Buy | $176.25 | 666 | $117,382 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
FBIO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns FBIO
Institutional investors own 31.2% of Fortress Biotech's shares and insiders 23.90%. The largest holder is Vanguard Capital Management, LLC with 3.11% of the shares (1.0M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 7 reduced their stake in the latest filings. Short interest is 19.00% of the float, or 17.93 days of average trading volume. The share count rose 1,336.0% since 2014.
Related: FBIO analyst forecast, FBIO key metrics. See the FBIO stock overview for the latest quote and news.
FBIO ownership FAQ
Who owns the most Fortress Biotech stock?
The largest shareholders of Fortress Biotech are Vanguard Capital Management, LLC (3.11%), Opaleye Management Inc (2.67%), Mackenzie Investments (1.67%), GSA Capital Partners LLP (1.37%), Shikiar Asset Management Inc (0.92%).
What percentage of Fortress Biotech is owned by institutions?
Institutions hold 31.2% of Fortress Biotech's shares outstanding; insiders hold 23.90%.
Which funds own Fortress Biotech?
The largest fund holders of Fortress Biotech are Vanguard MStar Total Stk Mkt Idx Invest (2.09%), Bridgeway Ultra-Small Company (0.46%), Fidelity Extended Market Index (0.43%), Mackenzie GQE US Small Cap F8 (0.41%), iShares Micro-Cap ETF (0.25%).
What is Fortress Biotech's short interest?
4.9M shares of Fortress Biotech were sold short, 19.00% of the float; at the average daily volume it would take 17.93 days to cover.
Are insiders buying or selling Fortress Biotech?
Of the latest 12 reported insider transactions in Fortress Biotech (since August 17, 2023), 11 were purchases and 1 were sales.
How many shares of Fortress Biotech are outstanding?
Fortress Biotech has 33.4M shares outstanding, of which 21.4M are in the public float.