175 tracked 13F filers disclose a position in IRWD as of the latest SEC 13F filings, a combined $516.7M 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 | ARMISTICE CAPITAL, LLC | $52.7M | 15.0M | ▼−6.2% Reduced · −997K sh | Q1 2026 | |
| 2 | BlackRock, Inc. | $46.9M | 13.4M | ▲+4.5% Added · +578K sh | Q1 2026 | |
| 3 | Sarissa Capital Management LP | $32.3M | 9.2M | ▼−42% Reduced · −6.7M sh | Q1 2026 | |
| 4 | BANK OF AMERICA CORP /DE/ | $30.5M | 8.7M | ▼−25% Reduced · −2.8M sh | Q1 2026 | |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $28.3M | 8.1M | ▼−1.8% Reduced · −144K sh | Q1 2026 | |
| 6 | AQR CAPITAL MANAGEMENT LLC | $26.4M | 7.5M | ▲+60% Added · +2.8M sh | Q1 2026 | |
| 7 | STATE STREET CORP | $26.2M | 7.5M | ▲+69% Added · +3.0M sh | Q1 2026 | |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | $23.5M | 6.7M | →First observed position No prior filed position | Q1 2026 | |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | $21.4M | 6.1M | →First observed position No prior filed position | Q1 2026 | |
| 10 | TWO SIGMA INVESTMENTS, LP | $20.5M | 5.8M | ▲+105% Added · +3.0M sh | Q1 2026 | |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $16.6M | 4.7M | ▼−4.8% Reduced · −238K sh | Q1 2026 | |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | $16.0M | 4.5M | ▲+25% Added · +920K sh | Q1 2026 | |
| 13 | MARSHALL WACE, LLP | $15.9M | 4.5M | ▲+2.3% Added · +101K sh | Q1 2026 | |
| 14 | JACOBS LEVY EQUITY MANAGEMENT, INC | $12.7M | 3.6M | ▲+32% Added · +873K sh | Q1 2026 | |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $11.9M | 3.4M | ▲+724% Added · +3.0M sh | Q1 2026 | |
| 16 | FEDERATED HERMES, INC. | $11.8M | 3.3M | ▲+0.9% Added · +31K sh | Q1 2026 | |
| 17 | GOLDMAN SACHS GROUP INC | $9.4M | 2.7M | ▲+111% Added · +1.4M sh | Q1 2026 | |
| 18 | DIMENSIONAL FUND ADVISORS LP | $7.3M | 2.1M | ▲+529% Added · +1.8M sh | Q1 2026 | |
| 19 | Connor, Clark & Lunn Investment Management Ltd. | $6.4M | 1.8M | ▼−7.8% Reduced · −156K sh | Q1 2026 | |
| 20 | Qube Research & Technologies Ltd | $5.6M | 1.6M | ▼−5.4% Reduced · −91K sh | Q1 2026 | |
| 21 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5.2M | 1.5M | ▲+228% Added · +1.0M sh | Q1 2026 | |
| 22 | NORTHERN TRUST CORP | $4.4M | 1.3M | ▲+2.6% Added · +32K sh | Q1 2026 | |
| 23 | Hillsdale Investment Management Inc. | $4.3M | 1.2M | ▲+6.9% Added · +80K sh | Q1 2026 | |
| 24 | DEUTSCHE BANK AG\ | $3.9M | 1.1M | ▲+1.4% Added · +15K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $3.5M | 989K | →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, 8 funds opened a new position in IRWD and 20 added to an existing one, while 21 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 |
|---|---|---|
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 71 funds | $6.2B |
| NVIDIA CORPNVDA | 70 funds | $44.1B |
| APPLE INCAAPL | 70 funds | $35.7B |
| MICROSOFT CORPMSFT | 70 funds | $30.1B |
| AMAZON.COM INCAMZN | 70 funds | $21.9B |
| META PLATFORMS INC-CLASS AMETA | 70 funds | $13.9B |
| ELI LILLY & COLLY | 70 funds | $7.1B |
| EXXON MOBIL CORPXOM | 70 funds | $5.3B |
| LAM RESEARCH CORPLRCX | 70 funds | $4.4B |
| ALPHABET INC-CL AGOOGL | 69 funds | $20.0B |
| JPMORGAN CHASE & COJPM | 69 funds | $8.2B |
| COSTCO WHOLESALE CORPCOST | 69 funds | $5.4B |
Ranked by how many of IRWD's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 7, 2026 | Silver Ronald | PFO & PAO | Sell (S) | 128K | $578K |
| Jun 16, 2026 | McHugh Julie | Director | Sell (S) | 22K | $80K |
| Mar 17, 2026 | DENNER ALEXANDER J | Director | Sell (S) | 6K | $19K |
| Mar 17, 2026 | DENNER ALEXANDER J | Director | Sell (S) | 6.7M | $20.5M |
| Feb 24, 2026 | Silver Ronald | Principal Accounting Officer | Sell (S) | 13K | $46K |
| Feb 24, 2026 | MCCOURT Thomas A | Chief Executive Officer, Director | Sell (S) | 104K | $379K |
| Feb 24, 2026 | Gaskins Tammi L | Chief Commercial Officer | Sell (S) | 11K | $41K |
| Feb 24, 2026 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Buy (S) | 17K | $62K |
| Feb 24, 2026 | John Minardo | Chief Legal Officer | Sell (S) | 19K | $70K |
| Feb 24, 2026 | Martini Gregory S. | Chief Financial Officer | Sell (S) | 11K | $42K |
| Feb 23, 2026 | Silver Ronald | Principal Accounting Officer | Sell (S) | 12K | $44K |
| Feb 23, 2026 | MCCOURT Thomas A | Chief Executive Officer, Director | Sell (S) | 95K | $361K |
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/IRWD/capital-change-brief"
Use Arkolith's capital_change_brief for IRWD. 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 IRWD. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.