63 tracked 13F filers disclose a position in STRO as of the latest SEC 13F filings, a combined $335.3M 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 | BVF INC/IL | $31.2M | 1.3M | ▲New +1.3M sh | Q1 2026 | |
| 2 | Affinity Asset Advisors, LLC | $26.6M | 1.1M | ▲+43% Added · +321K sh | Q1 2026 | |
| 3 | Samsara BioCapital, LLC | $26.5M | 1.1M | ▲+420% Added · +858K sh | Q1 2026 | |
| 4 | Kynam Capital Management, LP | $21.7M | 873K | ▲+82% Added · +393K sh | Q1 2026 | |
| 5 | ORBIMED ADVISORS LLC | $20.0M | 801K | ▲New +801K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $17.9M | 720K | →First observed position No prior filed position | Q1 2026 | |
| 7 | RA CAPITAL MANAGEMENT, L.P. | $17.8M | 715K | ▲New +715K sh | Q1 2026 | |
| 8 | EVENTIDE ASSET MANAGEMENT, LLC | $17.8M | 715K | ▲New +715K sh | Q1 2026 | |
| 9 | PERCEPTIVE ADVISORS LLC | $17.8M | 715K | ▲New +715K sh | Q1 2026 | |
| 10 | Point72 Asset Management, L.P. | $17.2M | 692K | ▲+286% Added · +513K sh | Q1 2026 | |
| 11 | ADAR1 Capital Management, LLC | $13.1M | 524K | ▲+682% Added · +457K sh | Q1 2026 | |
| 12 | Velan Capital Investment Management LP | $12.8M | 512K | ▲+64% Added · +200K sh | Q1 2026 | |
| 13 | BALYASNY ASSET MANAGEMENT L.P. | $11.6M | 466K | ▲+102% Added · +236K sh | Q1 2026 | |
| 14 | Woodline Partners LP | $11.4M | 457K | ▲New +457K sh | Q1 2026 | |
| 15 | UBS Group AG | $9.8M | 393K | ▲50× Added · +385K sh | Q1 2026 | |
| 16 | ACUTA CAPITAL PARTNERS, LLC | $6.7M | 269K | ▲+299% Added · +202K sh | Q1 2026 | |
| 17 | BlackRock, Inc. | $5.8M | 233K | ▲+98% Added · +115K sh | Q1 2026 | |
| 18 | MARSHALL WACE, LLP | $5.5M | 223K | ▲+160% Added · +137K sh | Q1 2026 | |
| 19 | MILLENNIUM MANAGEMENT LLC | $5.2M | 210K | ▼−50% Reduced · −208K sh | Q1 2026 | |
| 20 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $5.0M | 200K | —Held | Q1 2026 | |
| 21 | Opaleye Management Inc. | $4.7M | 191K | —Held | Q1 2026 | |
| 22 | GEODE CAPITAL MANAGEMENT, LLC | $4.3M | 171K | ▲+104% Added · +87K sh | Q1 2026 | |
| 23 | CITADEL ADVISORS LLC | $2.9M | 118K | ▲+266% Added · +85K sh | Q1 2026 | |
| 24 | RENAISSANCE TECHNOLOGIES LLC | $2.4M | 98K | ▼−20% Reduced · −25K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $2.4M | 95K | →First observed position No prior filed position | 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, 15 funds opened a new position in STRO and 12 added to an existing one, while 5 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 |
|---|---|---|
| INTUITIVE SURGICAL INCISRG | 26 funds | $4.7B |
| ELI LILLY & COLLY | 25 funds | $8.3B |
| REVOLUTION MEDICINES INCRVMD | 25 funds | $1.5B |
| BOSTON SCIENTIFIC CORPBSX | 24 funds | $2.9B |
| NVIDIA CORPNVDA | 22 funds | $40.4B |
| BROADCOM INCAVGO | 22 funds | $13.1B |
| BRISTOL-MYERS SQUIBB COBMY | 22 funds | $3.6B |
| ARISTA NETWORKS INCANET | 22 funds | $2.8B |
| REGENERON PHARMACEUTICALSREGN | 22 funds | $1.9B |
| GILEAD SCIENCES INCGILD | 22 funds | $1.8B |
| RHYTHM PHARMACEUTICALS INCRYTM | 22 funds | $1.3B |
| EDWARDS LIFESCIENCES CORPEW | 22 funds | $1.1B |
Ranked by how many of STRO's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Oct 15, 2025 | MATSUI CONNIE | Director | Buy (P) | 50K | $40K |
| Oct 15, 2025 | Chow Gregory K. | CFO | Buy (P) | 20K | $16K |
| Oct 15, 2025 | Chung Jane | Chief Executive Officer, Director | Buy (P) | 13K | $10K |
| Oct 15, 2025 | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | Buy (P) | 17K | $14K |
| Oct 15, 2025 | Pauling David | Chief Admin. Ofcr. & GC | Buy (P) | 13K | $10K |
| Jan 29, 2024 | Vasquez Nicki | CHIEF PORT. STRAT & ALNCE OFCR | Sell (S) | 12K | $61K |
| Aug 28, 2023 | Shtylla Brunilda | Chief Business Officer | Sell (S) | 15K | $73K |
| Aug 25, 2023 | Shtylla Brunilda | Chief Business Officer | Sell (S) | 12K | $53K |
| Mar 14, 2022 | NEWELL WILLIAM J | CEO, Director | Buy (P) | 10K | $78K |
| Sep 28, 2021 | Vasquez Nicki | Chief Port. Strat & Alnce Ofcr | Sell (S) | 4K | $73K |
| Jan 26, 2021 | Hallam Trevor | Chief Scientific Officer | Sell (S) | 165 | $4K |
| Jan 26, 2021 | Hallam Trevor | Chief Scientific Officer | Sell (S) | 2K | $57K |
| Class | 13F holders | Value held |
|---|---|---|
| STROthis pageStock/ETF | 63 funds | $335.3M |
| 869367102Stock | 5 funds | $5K |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for STRO
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/STRO/capital-change-brief"
Use Arkolith's capital_change_brief for STRO. 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 STRO. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.