Beta Bionics, Inc. (BBNX) Ownership
BBNX ownership summary
as of October 18, 2026- Institutions
- 112.8% of shares outstanding
- Insiders
- 0.82% of shares outstanding
- Shares outstanding
- 53.9M
- Float
- 31.2M shares available to trade
- Short interest
- 11.25% 6.0M shares short
- Days to cover
- 4.12 short interest down 43.1% vs prior month
- Institutions 112.81%
- Insiders 0.82%
BBNX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Eventide Asset Management, LLC | 11.59% | 6.3M | $102.2M | +308,185 (+5.2%) | June 30, 2026 |
| 2 | Soleus Capital Management, L.P. | 8.14% | 4.4M | $71.8M | +39,213 (+0.9%) | June 30, 2026 |
| 3 | Morgan Stanley - Brokerage Accounts | 7.91% | 4.3M | $69.8M | +39,188 (+0.9%) | June 30, 2026 |
| 4 | Sands Capital Ventures, LLC | 6.87% | 3.7M | $60.6M | — | June 30, 2026 |
| 5 | BlackRock Inc | 6.19% | 3.3M | $54.6M | +301,576 (+9.9%) | June 30, 2026 |
| 6 | Point72 Asset Management, L.P. | 4.18% | 2.3M | $36.9M | −270,357 (−10.7%) | June 30, 2026 |
| 7 | Vanguard Capital Management, LLC | 3.30% | 1.8M | $29.1M | +54,369 (+3.1%) | June 30, 2026 |
| 8 | Vestal Point Capital LP | 2.97% | 1.6M | $26.2M | −611,518 (−27.7%) | June 30, 2026 |
| 9 | RTW INVESTMENTS, LLC | 2.78% | 1.5M | $24.5M | −500,000 (−25.0%) | June 30, 2026 |
| 10 | Deerfield Management Co | 2.45% | 1.3M | $21.6M | — | June 30, 2026 |
| 11 | Omega Fund Management LLC | 2.44% | 1.3M | $21.5M | — | June 30, 2026 |
| 12 | Eversept Partners, LP | 2.32% | 1.2M | $20.4M | −165,397 (−11.7%) | June 30, 2026 |
| 13 | Divisadero Street Capital Management, LP | 2.06% | 1.1M | $18.2M | +1.1M (0.0%) | June 30, 2026 |
| 14 | Geode Capital Management, LLC | 1.99% | 1.1M | $17.6M | +140,774 (+15.1%) | June 30, 2026 |
| 15 | State Street Corp | 1.80% | 970K | $15.9M | +24,105 (+2.5%) | June 30, 2026 |
| 16 | Millennium Management LLC | 1.77% | 956K | $15.6M | +95,378 (+11.1%) | June 30, 2026 |
| 17 | Balyasny Asset Management LLC | 1.59% | 856K | $14.0M | +237,767 (+38.5%) | June 30, 2026 |
| 18 | Perceptive Advisors LLC | 1.54% | 833K | $13.6M | −10,000 (−1.2%) | June 30, 2026 |
| 19 | JPMorgan Chase & Co | 1.30% | 703K | $11.5M | +396,127 (+128.9%) | June 30, 2026 |
| 20 | Bruce & Co Inc | 1.23% | 666K | $10.9M | +115,000 (+20.9%) | 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 2.9M shares and 5 cut 1.6M.
BBNX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Eventide Gilead N | 7.38% | 4.0M | $65.1M | +232,944 (+6.2%) | June 30, 2026 |
| 2 | Eventide Healthcare & Life Sciences I | 3.80% | 2.1M | $33.6M | — | June 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.36% | 1.3M | $20.8M | — | August 31, 2026 |
| 4 | iShares Russell 2000 ETF | 1.96% | 1.1M | $17.3M | −12,160 (−1.1%) | September 30, 2026 |
| 5 | T. Rowe Price New Horizons | 1.74% | 938K | $15.3M | +937,795 (0.0%) | August 31, 2026 |
| 6 | Bruce | 1.23% | 666K | $10.9M | +115,000 (+20.9%) | June 30, 2026 |
| 7 | T. Rowe Price Integrated US Sm Gr Eq | 0.94% | 508K | $8.3M | +508,000 (0.0%) | August 31, 2026 |
| 8 | Fidelity Small Cap Index | 0.83% | 445K | $7.3M | +3,664 (+0.8%) | July 31, 2026 |
| 9 | iShares Russell 2000 Value ETF | 0.72% | 387K | $6.3M | +586 (+0.2%) | September 30, 2026 |
| 10 | T. Rowe Price Small-Mid Cap ETF | 0.55% | 296K | $4.8M | +60,467 (+25.7%) | September 30, 2026 |
| 11 | Heptagon Driehaus US Micro Cap Eq C$ Acc | 0.55% | 296K | $4.8M | −2,544 (−0.9%) | December 31, 2025 |
| 12 | Schwab US Small-Cap ETF™ | 0.44% | 240K | $3.9M | +162 (+0.1%) | September 30, 2026 |
| 13 | Vanguard Russell 2000 ETF | 0.43% | 234K | $3.8M | +5,366 (+2.3%) | August 31, 2026 |
| 14 | iShares US Medical Devices ETF | 0.41% | 221K | $3.6M | +3,864 (+1.8%) | September 30, 2026 |
| 15 | JPMorgan Small Cap Value I | 0.40% | 216K | $3.5M | — | August 31, 2026 |
| 16 | Fidelity Extended Market Index | 0.37% | 200K | $3.3M | −1,914 (−0.9%) | August 31, 2026 |
| 17 | Eventide Exponential Technologies I | 0.32% | 173K | $2.8M | +72,940 (+72.7%) | June 30, 2026 |
| 18 | Stt Strt® SPDR® S&P®HlthCrEqpmntETF | 0.31% | 169K | $2.8M | −4,136 (−2.4%) | September 30, 2026 |
| 19 | T. Rowe Price Integrated US SMCC Eq I | 0.28% | 150K | $2.4M | +149,695 (0.0%) | August 31, 2026 |
| 20 | JPMorgan US Small Company L | 0.24% | 130K | $2.1M | +3,358 (+2.7%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BBNX insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-04 | Mark Hopman | Sell | $11.57 | 353 | $4,084 |
| 2026-03-02 | Mark Hopman | Sell | $12.36 | 834 | $10,308 |
| 2026-03-02 | Mike Mensinger | Sell | $12.36 | 1,064 | $13,151 |
| 2026-03-02 | Stephen Feider | Sell | $12.36 | 1,428 | $17,650 |
| 2026-03-02 | Steven Jon Russell | Sell | $12.36 | 1,026 | $12,681 |
| 2026-01-06 | Mike Mensinger | Sell | $30.10 | 2,200 | $66,220 |
| 2026-01-02 | Mike Mensinger | Sell | $29.61 | 7,800 | $230,958 |
| 2026-01-02 | Stephen Feider | Sell | $29.53 | 20,000 | $590,600 |
| 2025-12-04 | Mark Hopman | Sell | $30.66 | 2,061 | $63,190 |
| 2025-12-02 | Mark Hopman | Sell | $29.34 | 856 | $25,115 |
| 2025-12-02 | Mike Mensinger | Sell | $29.34 | 1,063 | $31,188 |
| 2025-12-02 | Stephen Feider | Sell | $29.34 | 1,427 | $41,868 |
| 2025-12-02 | Steven Jon Russell | Sell | $29.34 | 1,025 | $30,074 |
| 2025-10-31 | Adam Lezack | Sell | $26.87 | 1,406 | $37,779 |
| 2025-10-31 | Maria Palasis | Sell | $26.91 | 1,406 | $37,835 |
| 2025-10-03 | Stephen Feider | Sell | $21.69 | 4,982 | $108,060 |
| 2025-10-01 | Stephen Feider | Sell | $20.76 | 15,018 | $311,774 |
| 2025-09-05 | Mark Hopman | Sell | $20.56 | 11,411 | $234,610 |
| 2025-09-05 | Stephen Feider | Sell | $21.00 | 100 | $2,100 |
| 2025-09-04 | Mark Hopman | Sell | $19.97 | 6,818 | $136,155 |
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.
BBNX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BBNX
Institutional investors own 112.8% of Beta Bionics's shares and insiders 0.82%. The largest holder is Eventide Asset Management, LLC with 11.59% of the shares (6.3M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 5 reduced their stake in the latest filings. Short interest is 11.25% of the float, or 4.12 days of average trading volume. The share count fell 5.4% since 2023.
Related: BBNX analyst forecast, BBNX key metrics. See the BBNX stock overview for the latest quote and news.
BBNX ownership FAQ
Who owns the most Beta Bionics stock?
The largest shareholders of Beta Bionics are Eventide Asset Management, LLC (11.59%), Soleus Capital Management, L.P. (8.14%), Morgan Stanley - Brokerage Accounts (7.91%), Sands Capital Ventures, LLC (6.87%), BlackRock Inc (6.19%).
What percentage of Beta Bionics is owned by institutions?
Institutions hold 112.8% of Beta Bionics's shares outstanding; insiders hold 0.82%.
Which funds own Beta Bionics?
The largest fund holders of Beta Bionics are Eventide Gilead N (7.38%), Eventide Healthcare & Life Sciences I (3.80%), Vanguard MStar Total Stk Mkt Idx Invest (2.36%), iShares Russell 2000 ETF (1.96%), T. Rowe Price New Horizons (1.74%).
What is Beta Bionics's short interest?
6.0M shares of Beta Bionics were sold short, 11.25% of the float; at the average daily volume it would take 4.12 days to cover.
Are insiders buying or selling Beta Bionics?
Of the latest 20 reported insider transactions in Beta Bionics (since September 4, 2025), 0 were purchases and 20 were sales.
How many shares of Beta Bionics are outstanding?
Beta Bionics has 53.9M shares outstanding, of which 31.2M are in the public float.