Butterfly Network, Inc. (BFLY) Ownership
BFLY ownership summary
as of October 18, 2026- Institutions
- 62.1% of shares outstanding
- Insiders
- 10.24% of shares outstanding
- Shares outstanding
- 244.9M
- Float
- 220.0M shares available to trade
- Short interest
- 14.79% 31.6M shares short
- Days to cover
- 5.77 short interest down 7.1% vs prior month
- Institutions 62.06%
- Insiders 10.24%
- Other investors 27.70%
BFLY top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.07% | 18.8M | $136.5M | +2.9M (+17.9%) | June 30, 2026 |
| 2 | Glenview Capital Management LLC | 5.38% | 14.3M | $103.9M | — | June 30, 2026 |
| 3 | Hood River Capital Management LLC | 4.95% | 13.2M | $95.6M | +4.6M (+53.0%) | June 30, 2026 |
| 4 | Fosun International Ltd | 3.84% | 10.2M | $74.2M | −481,707 (−4.5%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 3.21% | 8.6M | $62.1M | +367,227 (+4.5%) | June 30, 2026 |
| 6 | D. E. Shaw & Co LP | 2.40% | 6.4M | $46.3M | +5.3M (+470.6%) | June 30, 2026 |
| 7 | State Street Corp | 2.16% | 5.8M | $41.8M | +223,012 (+4.0%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.01% | 5.3M | $38.8M | +536,568 (+11.2%) | June 30, 2026 |
| 9 | ARK Investment Management LLC | 1.91% | 5.1M | $36.9M | −142,047 (−2.7%) | June 30, 2026 |
| 10 | Nuveen, LLC | 1.90% | 5.1M | $36.7M | +1.3M (+34.8%) | June 30, 2026 |
| 11 | FMR Inc | 1.84% | 4.9M | $35.6M | +4.5M (+1,016.0%) | June 30, 2026 |
| 12 | Awm Investment Company Inc | 1.66% | 4.4M | $32.1M | — | June 30, 2026 |
| 13 | SEI Investments Co | 1.10% | 2.9M | $21.3M | +638,978 (+27.8%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 1.04% | 2.8M | $20.0M | +1.9M (+224.1%) | June 30, 2026 |
| 15 | First Light Asset Management, LLC | 0.99% | 2.6M | $19.2M | −17,763 (−0.7%) | June 30, 2026 |
| 16 | Deutsche Bank AG | 0.97% | 2.6M | $18.7M | +316,926 (+14.0%) | June 30, 2026 |
| 17 | Vanguard Portfolio Management, LLC | 0.89% | 2.4M | $17.3M | +545,358 (+29.7%) | June 30, 2026 |
| 18 | Millennium Management LLC | 0.81% | 2.2M | $15.6M | −1.3M (−38.2%) | June 30, 2026 |
| 19 | Bank of America Corp | 0.80% | 2.1M | $15.5M | −2.0M (−48.7%) | June 30, 2026 |
| 20 | Dimensional Fund Advisors, Inc. | 0.73% | 1.9M | $14.1M | −411,746 (−17.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 23.0M shares and 6 cut 4.4M.
BFLY top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Growth Company Fund | 4.21% | 11.2M | $81.3M | +3.3M (+41.4%) | August 31, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.25% | 6.0M | $43.4M | +1,188 (+0.0%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.13% | 5.7M | $41.2M | −65,472 (−1.1%) | September 30, 2026 |
| 4 | ARK Genomic Revolution ETF | 1.82% | 4.8M | $35.1M | +11,822 (+0.2%) | September 30, 2026 |
| 5 | Hood River New Opportunities Inst | 1.60% | 4.3M | $30.9M | +1.5M (+55.3%) | June 30, 2026 |
| 6 | Fidelity Growth Company K6 | 1.22% | 3.2M | $23.5M | +954,253 (+41.8%) | August 31, 2026 |
| 7 | Fidelity Series Growth Company | 1.02% | 2.7M | $19.8M | +815,019 (+42.6%) | August 31, 2026 |
| 8 | Fidelity Small Cap Index | 0.86% | 2.3M | $16.7M | +19,552 (+0.9%) | July 31, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.77% | 2.1M | $14.9M | −2,600 (−0.1%) | September 30, 2026 |
| 10 | Fidelity Small Cap Growth | 0.68% | 1.8M | $13.1M | +622,450 (+52.3%) | July 31, 2026 |
| 11 | DWS Small Cap Core S | 0.66% | 1.8M | $12.7M | −150,000 (−7.9%) | July 31, 2026 |
| 12 | Nuveen Quant Small Cap Equity R6 | 0.62% | 1.7M | $12.0M | −366,800 (−18.1%) | August 31, 2026 |
| 13 | Fidelity Enhanced Small Cap Core ETF | 0.62% | 1.7M | $12.0M | — | September 30, 2026 |
| 14 | Calamos Timpani Small Cap Growth I | 0.52% | 1.4M | $10.0M | +14,557 (+1.1%) | August 31, 2026 |
| 15 | Vanguard Russell 2000 ETF | 0.45% | 1.2M | $8.8M | +28,466 (+2.4%) | August 31, 2026 |
| 16 | Schwab US Small-Cap ETF™ | 0.42% | 1.1M | $8.2M | +756 (+0.1%) | September 30, 2026 |
| 17 | Heptagon Driehaus US Micro Cap Eq C$ Acc | 0.42% | 1.1M | $8.1M | +1.1M (0.0%) | August 31, 2026 |
| 18 | Fidelity Extended Market Index | 0.39% | 1.0M | $7.6M | −1,190 (−0.1%) | August 31, 2026 |
| 19 | iShares US Medical Devices ETF | 0.39% | 1.0M | $7.6M | +18,312 (+1.8%) | September 30, 2026 |
| 20 | CREF Total Global Stock Account R3 | 0.38% | 1.0M | $7.4M | — | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BFLY insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-08 | Jonathan M Rothberg | Sell | $4.18 | 335,834 | $1.4M |
| 2026-01-07 | John N Doherty | Sell | $3.98 | 60,182 | $239,524 |
| 2026-01-07 | Jonathan M Rothberg | Sell | $4.14 | 452,729 | $1.9M |
| 2026-01-06 | Jonathan M Rothberg | Sell | $4.03 | 351,617 | $1.4M |
| 2026-01-05 | Victor Ku | Sell | $3.82 | 35,968 | $137,398 |
| 2025-12-26 | Jonathan M Rothberg | Sell | $4.01 | 14,911 | $59,793 |
| 2025-12-24 | Jonathan M Rothberg | Sell | $4.00 | 2,673 | $10,692 |
| 2025-12-23 | Jonathan M Rothberg | Sell | $4.01 | 44,781 | $179,572 |
| 2025-12-16 | Jonathan M Rothberg | Sell | $3.14 | 284,986 | $894,856 |
| 2025-12-16 | Jonathan M Rothberg | Sell | $3.14 | 284,986 | $894,856 |
| 2025-12-15 | Jonathan M Rothberg | Sell | $3.16 | 601,308 | $1.9M |
| 2025-12-15 | Jonathan M Rothberg | Sell | $3.16 | 601,308 | $1.9M |
| 2025-12-12 | Jonathan M Rothberg | Sell | $3.08 | 193,293 | $595,342 |
| 2025-12-11 | Jonathan M Rothberg | Sell | $3.08 | 123,354 | $379,930 |
| 2025-12-10 | Jonathan M Rothberg | Sell | $3.13 | 288,918 | $904,313 |
| 2025-12-09 | Jonathan M Rothberg | Sell | $3.11 | 176,070 | $547,578 |
| 2025-12-08 | Jonathan M Rothberg | Sell | $3.27 | 769,327 | $2.5M |
| 2025-12-05 | Jonathan M Rothberg | Sell | $3.07 | 37,598 | $115,426 |
| 2025-12-04 | Jonathan M Rothberg | Sell | $3.08 | 64,198 | $197,730 |
| 2025-12-02 | Nicholas Caezza | Sell | $2.83 | 1,686 | $4,771 |
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.
BFLY shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BFLY
Institutional investors own 62.1% of Butterfly Network's shares and insiders 10.24%. The largest holder is BlackRock Inc with 7.07% of the shares (18.8M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 6 reduced their stake in the latest filings. Short interest is 14.79% of the float, or 5.77 days of average trading volume. The share count rose 4,352.5% since 2019.
Related: BFLY analyst forecast, BFLY key metrics. See the BFLY stock overview for the latest quote and news.
BFLY ownership FAQ
Who owns the most Butterfly Network stock?
The largest shareholders of Butterfly Network are BlackRock Inc (7.07%), Glenview Capital Management LLC (5.38%), Hood River Capital Management LLC (4.95%), Fosun International Ltd (3.84%), Vanguard Capital Management, LLC (3.21%).
What percentage of Butterfly Network is owned by institutions?
Institutions hold 62.1% of Butterfly Network's shares outstanding; insiders hold 10.24%.
Which funds own Butterfly Network?
The largest fund holders of Butterfly Network are Fidelity Growth Company Fund (4.21%), Vanguard MStar Total Stk Mkt Idx Invest (2.25%), iShares Russell 2000 ETF (2.13%), ARK Genomic Revolution ETF (1.82%), Hood River New Opportunities Inst (1.60%).
What is Butterfly Network's short interest?
31.6M shares of Butterfly Network were sold short, 14.79% of the float; at the average daily volume it would take 5.77 days to cover.
Are insiders buying or selling Butterfly Network?
Of the latest 20 reported insider transactions in Butterfly Network (since December 2, 2025), 0 were purchases and 20 were sales.
How many shares of Butterfly Network are outstanding?
Butterfly Network has 244.9M shares outstanding, of which 220.0M are in the public float.