Who owns Beta Bionics, Inc. (BBNX)
Which tracked institutional funds hold BBNX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See BBNX company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on BBNX is one-sided between 2025-Q4 and 2026-Q1: 13 added or opened and 87 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
BBNX’s largest tracked holder by dollar value, WELLINGTON MANAGEMENT GROUP LLP, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in BBNX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 130 tracked filers holding BBNX, 71 increased or opened the position and 99 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in BBNX between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 9
- VANGUARD CAPITAL MANAGEMENT LLC$17M
- Bruce & Co., Inc.$6M
- VANGUARD FIDUCIARY TRUST CO$3M
- VANGUARD PORTFOLIO MANAGEMENT LLC$2M
- BRIDGER MANAGEMENT, LLC$2M
- LAZARD ASSET MANAGEMENT LLC$720K
Full exits 28
- VANGUARD GROUP INC$59M
- Driehaus Capital Management LLC$29M
- Walleye Capital LLC$20M
- 12 West Capital Management LP$18M
- LORD, ABBETT & CO. LLC$13M
- NORGES BANK$10M
Largest adds
- Y-Intercept (Hong Kong) Ltd$5M
- Vestal Point Capital, LP$4M
- BALYASNY ASSET MANAGEMENT L.P.$4M
- Engineers Gate Manager LP$1M
Largest trims
- FARALLON CAPITAL MANAGEMENT LLC$95M
- EVENTIDE ASSET MANAGEMENT, LLC$93M
- Sands Capital Alternatives, LLC$72M
- MORGAN STANLEY$63M
- BlackRock, Inc.$58M
- RTW INVESTMENTS, LP$56M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| EVENTIDE ASSET MANAGEMENT, LLC added | 5,945,488 | $60M | 7.4% | 2026-Q1 |
| Soleus Capital Management, L.P. added | 4,354,501 | $44M | 5.4% | 2026-Q1 |
| MORGAN STANLEY added | 4,227,634 | $42M | 5.2% | 2026-Q1 |
| Sands Capital Alternatives, LLC added | 3,708,043 | $37M | 4.6% | 2026-Q1 |
| FARALLON CAPITAL MANAGEMENT LLC trimmed | 3,607,920 | $36M | 4.5% | 2026-Q1 |
| BlackRock, Inc. added | 3,038,595 | $30M | 3.8% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 2,525,040 | $25M | 3.1% | 2026-Q1 |
| Vestal Point Capital, LP added | 2,211,518 | $22M | 2.7% | 2026-Q1 |
| RTW INVESTMENTS, LP trimmed | 2,000,000 | $20M | 2.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,727,977 | $17M | 2.1% | 2026-Q1 |
| Eversept Partners, LP added | 1,414,838 | $14M | 1.8% | 2026-Q1 |
| DEERFIELD MANAGEMENT COMPANY, L.P. added | 1,324,000 | $13M | 1.6% | 2026-Q1 |
| Omega Fund Management, LLC | 1,316,183 | $13M | 1.6% | 2026-Q1 |
| STATE STREET CORP added | 946,087 | $9M | 1.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 932,678 | $9M | 1.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 860,866 | $9M | 1.1% | 2026-Q1 |
| PERCEPTIVE ADVISORS LLC added | 842,944 | $8M | 1.0% | 2026-Q1 |
| UBS Group AG added | 623,253 | $6M | 0.8% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 617,915 | $6M | 0.8% | 2026-Q1 |
| Bruce & Co., Inc. new | 550,700 | $6M | 0.7% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 546,132 | $5M | 0.7% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 485,854 | $5M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 322,467 | $3M | 0.4% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 307,229 | $3M | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 295,818 | $3M | 0.4% | 2026-Q1 |
| PURA VIDA INVESTMENTS, LLC | 281,250 | $3M | 0.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 272,086 | $3M | 0.3% | 2026-Q1 |
| Granahan Investment Management, LLC added | 248,449 | $2M | 0.3% | 2026-Q1 |
| First Eagle Investment Management, LLC trimmed | 242,000 | $2M | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 241,601 | $2M | 0.3% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 229,042 | $2M | 0.3% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL trimmed | 218,094 | $2M | 0.3% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 188,883 | $2M | 0.2% | 2026-Q1 |
| BRIDGER MANAGEMENT, LLC new | 163,124 | $2M | 0.2% | 2026-Q1 |
| Engineers Gate Manager LP added | 136,343 | $1M | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 136,215 | $1M | 0.2% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 121,334 | $1M | 0.2% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 114,719 | $1M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 35,400 | $1M | 0.1% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 98,804 | $990K | 0.1% | 2026-Q1 |
| Nuveen, LLC added | 85,928 | $861K | 0.1% | 2026-Q1 |
| Jump Financial, LLC trimmed | 85,800 | $860K | 0.1% | 2026-Q1 |
| Bellevue Group AG trimmed | 72,152 | $723K | 0.1% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC new | 71,905 | $720K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 71,211 | $714K | 0.1% | 2026-Q1 |
| Quantinno Capital Management LP added | 67,879 | $680K | 0.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 65,495 | $656K | 0.1% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 59,624 | $597K | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 58,156 | $583K | 0.1% | 2026-Q1 |
| Jain Global LLC trimmed | 56,616 | $567K | 0.1% | 2026-Q1 |
| Corient Private Wealth LLC new | 56,082 | $562K | 0.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 55,100 | $552K | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 52,142 | $522K | 0.1% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 50,982 | $511K | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 48,063 | $482K | 0.1% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP | 3,901,599 | $78M | 9.6% | 2025-Q3 stale |
| VANGUARD GROUP INC trimmed | 1,933,538 | $59M | 7.3% | 2025-Q4 stale |
| Driehaus Capital Management LLC trimmed | 956,784 | $29M | 3.6% | 2025-Q4 stale |
| Walleye Capital LLC added | 646,539 | $20M | 2.4% | 2025-Q4 stale |
| 12 West Capital Management LP new | 575,000 | $18M | 2.2% | 2025-Q4 stale |
| LORD, ABBETT & CO. LLC added | 430,403 | $13M | 1.6% | 2025-Q4 stale |
| JANUS HENDERSON GROUP PLC trimmed | 650,825 | $13M | 1.6% | 2025-Q3 stale |
| NORGES BANK new | 339,300 | $10M | 1.3% | 2025-Q4 stale |
| RA CAPITAL MANAGEMENT, L.P. | 500,000 | $7M | 0.9% | 2025-Q2 stale |
| ESSEX INVESTMENT MANAGEMENT CO LLC trimmed | 217,796 | $7M | 0.8% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC added | 151,647 | $5M | 0.6% | 2025-Q4 stale |
| SG Americas Securities, LLC new | 150,277 | $5M | 0.6% | 2025-Q4 stale |
| JANE STREET GROUP, LLC added | 140,592 | $4M | 0.5% | 2025-Q4 stale |
| Freestone Grove Partners LP new | 138,138 | $4M | 0.5% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 137,200 | $4M | 0.5% | 2025-Q4 stale |
| Clearbridge Investments, LLC trimmed | 197,052 | $4M | 0.5% | 2025-Q3 stale |
| GILDER GAGNON HOWE & CO LLC trimmed | 162,649 | $3M | 0.4% | 2025-Q3 stale |
| Rakuten Investment Management, Inc. added | 35,512 | $3M | 0.3% | 2025-Q3 stale |
| Legato Capital Management LLC added | 85,660 | $3M | 0.3% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 83,421 | $3M | 0.3% | 2025-Q4 stale |
| Longaeva Partners L.P. trimmed | 125,483 | $2M | 0.3% | 2025-Q3 stale |
| Kent Lake PR LLC new | 125,000 | $2M | 0.3% | 2025-Q3 stale |
| First Turn Management, LLC new | 157,194 | $2M | 0.3% | 2025-Q2 stale |
| Caisse de depot et placement du Quebec added | 114,666 | $2M | 0.3% | 2025-Q3 stale |
| Holocene Advisors, LP trimmed | 71,777 | $2M | 0.3% | 2025-Q4 stale |
| Woodline Partners LP | 125,000 | $2M | 0.2% | 2025-Q2 stale |
| BRAIDWELL LP new | 140,000 | $2M | 0.2% | 2025-Q1 stale |
| Jefferies Financial Group Inc. new | 51,400 | $2M | 0.2% | 2025-Q4 stale |
| SEI INVESTMENTS CO new | 48,074 | $1M | 0.2% | 2025-Q4 stale |
| Meridiem Capital Partners LP new | 73,386 | $1M | 0.2% | 2025-Q3 stale |
| Lisanti Capital Growth, LLC new | 42,985 | $1M | 0.2% | 2025-Q4 stale |
| Divisadero Street Capital Management, LP trimmed | 39,606 | $1M | 0.1% | 2025-Q4 stale |
| Calamos Advisors LLC added | 36,091 | $1M | 0.1% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. | 75,000 | $1M | 0.1% | 2025-Q2 stale |
| Lighthouse Investment Partners, LLC new | 35,000 | $1M | 0.1% | 2025-Q4 stale |
| Numerai GP LLC new | 34,285 | $1M | 0.1% | 2025-Q4 stale |
| AMERIPRISE FINANCIAL INC trimmed | 32,409 | $988K | 0.1% | 2025-Q4 stale |
| VOYA INVESTMENT MANAGEMENT LLC new | 30,366 | $925K | 0.1% | 2025-Q4 stale |
| JENNISON ASSOCIATES LLC trimmed | 59,185 | $862K | 0.1% | 2025-Q2 stale |
| Vontobel Holding Ltd. new | 24,152 | $736K | 0.1% | 2025-Q4 stale |
| Point72 (DIFC) Ltd new | 57,158 | $700K | 0.1% | 2025-Q1 stale |
| DARK FOREST CAPITAL MANAGEMENT LP trimmed | 20,906 | $637K | 0.1% | 2025-Q4 stale |
| Mariner, LLC trimmed | 20,671 | $630K | 0.1% | 2025-Q4 stale |
| GSA CAPITAL PARTNERS LLP added | 18,744 | $571K | 0.1% | 2025-Q4 stale |
| Ghisallo Capital Management LLC trimmed | 25,000 | $497K | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.