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/ARWR/capital-change-brief"
Use Arkolith's capital_change_brief for ARWR. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $1.1B | 18.2M | ▼−15% Reduced · −3.2M sh | Q1 2026 | |
| 2 | Avoro Capital Advisors LLC | $670.9M | 10.7M | ▲+0.7% Added · +75K sh | Q1 2026 | |
| 3 | FMR LLC | $455.6M | 7.3M | ▲+11% Added · +746K sh | Q1 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $448.1M | 7.1M | ▲New +7.1M sh | Q1 2026 | |
| 5 | STATE STREET CORP | $407.3M | 6.5M | ▲+1.4% Added · +92K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $378.2M | 6.0M | ▲New +6.0M sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $274.5M | 4.3M | ▲+31% Added · +1.0M sh | Q1 2026 | |
| 8 | FRED ALGER MANAGEMENT, LLC | $209.6M | 3.3M | ▲+82% Added · +1.5M sh | Q1 2026 | |
| 9 | Vestal Point Capital, LP | $142.6M | 2.3M | ▲+153% Added · +1.4M sh | Q1 2026 | |
| 10 | BAKER BROS. ADVISORS LP | $124.9M | 2.0M | ▼−8.4% Reduced · −183K sh | Q1 2026 | |
| 11 | GOLDMAN SACHS GROUP INC | $109.1M | 1.7M | ▲+3.7% Added · +62K sh | Q1 2026 | |
| 12 | NORGES BANK | $113.2M | 1.7M | ▼−11% Reduced · −220K sh | Q4 2025 | |
| 13 | NORTHERN TRUST CORP | $103.8M | 1.7M | ▲+23% Added · +310K sh | Q1 2026 | |
| 14 | Siren, L.L.C. | $101.3M | 1.6M | ▲+7.7% Added · +115K sh | Q1 2026 | |
| 15 | DEERFIELD MANAGEMENT COMPANY, L.P. | $98.6M | 1.6M | ▼−14% Reduced · −260K sh | Q1 2026 | |
| 16 | JANUS HENDERSON GROUP PLC | $90.1M | 1.4M | ▲+12% Added · +157K sh | Q1 2026 | |
| 17 | UBS Group AG | $83.8M | 1.3M | ▲+35% Added · +349K sh | Q1 2026 | |
| 18 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | $83.5M | 1.3M | ▲+5.6% Added · +71K sh | Q1 2026 | |
| 19 | Pictet Asset Management Holding SA | $79.6M | 1.3M | ▲+24% Added · +245K sh | Q1 2026 | |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $74.7M | 1.2M | ▼−12% Reduced · −162K sh | Q1 2026 | |
| 21 | D. E. Shaw & Co., Inc. | $74.2M | 1.2M | ▲+710% Added · +1.0M sh | Q1 2026 | |
| 22 | Fisher Asset Management, LLC | $69.8M | 1.1M | ▼−15% Reduced · −198K sh | Q1 2026 | |
| 23 | BANK OF AMERICA CORP /DE/ | $66.7M | 1.1M | ▲+71% Added · +442K sh | Q1 2026 | |
| 24 | Hood River Capital Management LLC | $66.2M | 1.1M | ▲New +1.1M sh | Q1 2026 | |
| 25 | PRICE T ROWE ASSOCIATES INC /MD/ | $65.4M | 1.0M | ▲+24% Added · +205K 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 15, 2026 | Cohen Matthew Gregory | Director | Grant (A) | 12K | $0 |
| May 12, 2026 | Lu Hongbo | Director | Sell (S) | 3K | $228K |
| Apr 23, 2026 | Hamilton James C | Chief Medical Officer | Sell (S) | 10K | $750K |
| Apr 22, 2026 | Apel Daniel Joseph | Chief Financial Officer | Sell (S) | 3K | $225K |
| Apr 22, 2026 | Apel Daniel Joseph | Chief Financial Officer | Sell (S) | 1K | $82K |
| Apr 22, 2026 | Apel Daniel Joseph | Chief Financial Officer | Sell (S) | 9K | $628K |
| Mar 5, 2026 | Hamilton James C | Chief Medical Officer | Sell (S) | 10K | $642K |
| Jan 6, 2026 | O'Brien Patrick | COO | Gift (G) | 540 | $0 |
| Jan 6, 2026 | O'Brien Patrick | COO | Grant (A) | 75K | $0 |
| Jan 6, 2026 | O'Brien Patrick | COO | Gift (G) | 440 | $0 |
| Jan 6, 2026 | O'Brien Patrick | COO | Gift (G) | 540 | $0 |
| Jan 6, 2026 | O'Brien Patrick | COO | Gift (G) | 540 | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 143 funds | $68.0B |
| BROADCOM INCAVGO | 143 funds | $36.5B |
| ELI LILLY & COLLY | 143 funds | $16.5B |
| MICRON TECHNOLOGY INCMU | 143 funds | $13.8B |
| NVIDIA CORPNVDA | 142 funds | $99.2B |
| SERVICENOW INCNOW | 142 funds | $3.6B |
| AMAZON.COM INCAMZN | 141 funds | $49.7B |
| UNITEDHEALTH GROUP INCUNH | 141 funds | $6.6B |
| GILEAD SCIENCES INCGILD | 141 funds | $5.0B |
| BOSTON SCIENTIFIC CORPBSX | 140 funds | $3.4B |
| ALPHABET INC-CL AGOOGL | 139 funds | $44.5B |
| META PLATFORMS INC-CLASS AMETA | 139 funds | $30.3B |
Ranked by how many of ARWR's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ARWR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.