65 tracked 13F filers disclose a position in OBIO as of the latest SEC 13F filings, a combined $107.3M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | RTW INVESTMENTS, LP | $41.2M | 9.6M | ▲+15% Added · +1.3M sh | Q2 2026 | |
| 2 | PERCEPTIVE ADVISORS LLC | $21.4M | 5.0M | ▼−1.7% Reduced · −89K sh | Q1 2026 | |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $9.4M | 2.2M | →First observed position No prior filed position | Q1 2026 | |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | $4.4M | 1.0M | ▲+108% Added · +522K sh | Q2 2026 | |
| 5 | Alyeska Investment Group, L.P. | $4.3M | 1.0M | —Held | Q1 2026 | |
| 6 | MILLENNIUM MANAGEMENT LLC | $3.0M | 703K | ▲+189% Added · +459K sh | Q1 2026 | |
| 7 | BlackRock, Inc. | $2.7M | 636K | ▲+0.8% Added · +5K sh | Q1 2026 | |
| 8 | STATE STREET CORP | $2.2M | 516K | ▲+205% Added · +347K sh | Q2 2026 | |
| 9 | RICE HALL JAMES & ASSOCIATES, LLC | $1.8M | 424K | ▲22× Added · +405K sh | Q2 2026 | |
| 10 | Affinity Asset Advisors, LLC | $1.7M | 403K | ▼−30% Reduced · −170K sh | Q1 2026 | |
| 11 | Sixth Street Partners Management Company, L.P. | $1.5M | 350K | ▲New +350K sh | Q2 2026 | |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1.1M | 265K | ▲+0.6% Added · +2K sh | Q1 2026 | |
| 13 | Knott David M Jr | $1.1M | 254K | —Held | Q2 2026 | |
| 14 | VANGUARD FIDUCIARY TRUST CO | $1000K | 235K | →First observed position No prior filed position | Q1 2026 | |
| 15 | Simplify Asset Management Inc. | $947K | 219K | —Held | Q2 2026 | |
| 16 | MARSHALL WACE, LLP | $801K | 188K | ▲+9.8% Added · +17K sh | Q1 2026 | |
| 17 | 683 Capital Management, LLC | $786K | 185K | ▼−9.3% Reduced · −19K sh | Q1 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $660K | 155K | ▲+16% Added · +21K sh | Q1 2026 | |
| 19 | DAFNA Capital Management LLC | $539K | 127K | —Held | Q1 2026 | |
| 20 | NORTHERN TRUST CORP | $503K | 118K | ▲+6.7% Added · +7K sh | Q1 2026 | |
| 21 | Qube Research & Technologies Ltd | $463K | 109K | ▲+2.1% Added · +2K sh | Q1 2026 | |
| 22 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $414K | 98K | ▼−37% Reduced · −58K sh | Q1 2026 | |
| 23 | Daytona Street Capital LLC | $379K | 96K | ▲+83% Added · +44K sh | Q2 2026 | |
| 24 | IFP Advisors, Inc | $387K | 90K | ▼−9.4% Reduced · −9K sh | Q2 2026 | |
| 25 | Point72 Asset Management, L.P. | $374K | 88K | ▼−46% Reduced · −74K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 7 funds opened a new position in OBIO and 11 added to an existing one, while 10 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 30 funds | $17.7B |
| MICROSOFT CORPMSFT | 30 funds | $7.5B |
| AMAZON.COM INCAMZN | 29 funds | $10.6B |
| ALPHABET INC-CL AGOOGL | 29 funds | $7.1B |
| META PLATFORMS INC-CLASS AMETA | 28 funds | $6.1B |
| JPMORGAN CHASE & COJPM | 28 funds | $3.6B |
| INTUITIVE SURGICAL INCISRG | 28 funds | $3.0B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 28 funds | $2.5B |
| ELI LILLY & COLLY | 28 funds | $2.5B |
| APPLE INCAAPL | 27 funds | $12.0B |
| BROADCOM INCAVGO | 27 funds | $6.4B |
| CHEVRON CORPCVX | 27 funds | $3.3B |
Ranked by how many of OBIO's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 3, 2026 | Sherman Darren | See Remarks, Director | Sell (S) | 15K | $61K |
| Jul 1, 2026 | Sherman Darren | See Remarks, Director | Sell (S) | 15K | $64K |
| Jun 1, 2026 | Sherman Darren | See Remarks, Director | Sell (S) | 15K | $58K |
| Jun 1, 2026 | Hochman David P | See Remarks, Director | Buy (P) | 5K | $19K |
| May 18, 2026 | Aryeh Jason | Director | Buy (P) | 665 | $2K |
| May 15, 2026 | Aryeh Jason | Director | Buy (P) | 9K | $35K |
| May 15, 2026 | Hochman David P | See Remarks, Director | Buy (P) | 5K | $19K |
| May 14, 2026 | Fain Eric S | Director | Buy (P) | 20K | $83K |
| Apr 27, 2026 | RTW INVESTMENTS, LP | 10% Owner | Sell (S) | 32 | $132 |
| Mar 13, 2026 | Hochman David P | See Remarks, Director | Buy (P) | 10K | $43K |
| Nov 14, 2025 | Hochman David P | See Remarks, Director | Buy (P) | 5K | $20K |
| Sep 19, 2025 | Aryeh Jason | Director | Buy (P) | 1K | $2K |
Connected entities for OBIO
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OBIO/capital-change-brief"
Use Arkolith's capital_change_brief for OBIO. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OBIO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.