Who Owns IRWD?
Ironwood Pharmaceuticals, Inc. — Institutional Ownership & 13F Holdings
$4.17
+0.02 (+0.48%)
Market Cap
$640.8M
Shares Outstanding
163,058,000
Institutional Holders
201
Total Inst. Value
$204.3M
% of Float Held
99.0%
QoQ Holder Change
-3
Institutional data as of Q1 2025
New Positions
40
Closed Positions
50
Increased
68
Decreased
63
Institutional Ownership Trend
Top 10 Institutional Holders(Q1 2025)
| # | Fund | Value | Shares |
|---|---|---|---|
| 1 | Sarissa Capital Management LP | $24.1M | 16,390,000 |
| 2 | VANGUARD GROUP INC | $23.1M | 15,696,161 |
| 3 | ARMISTICE CAPITAL, LLC | $20.1M | 13,700,000 |
| 4 | BlackRock, Inc. | $17.5M | 11,878,924 |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $14.6M | 9,940,492 |
| 6 | BRAIDWELL LP | $9.7M | 6,622,584 |
| 7 | Kynam Capital Management, LP | $8.6M | 5,822,938 |
| 8 | LSV ASSET MANAGEMENT | $5.9M | 3,997,801 |
| 9 | JANE STREET GROUP, LLC | $5.2M | 3,510,117 |
| 10 | STATE STREET CORP | $5.1M | 3,498,289 |
Biggest Buyers & Sellers This Quarter
Top Buyers
| Fund | Shares Added | Value |
|---|---|---|
| ARMISTICE CAPITAL, LLC | +4.2M | $20.1M |
| RENAISSANCE TECHNOLOGIES LLC | +874K | $14.6M |
| BRAIDWELL LP | +1.2M | $9.7M |
| Kynam Capital Management, LP | +1.1M | $8.6M |
| JANE STREET GROUP, LLC | +3.1M | $5.2M |
Top Sellers
| Fund | Shares Removed | Value |
|---|---|---|
| BlackRock, Inc. | -11.2M | $17.5M |
| Pacer Advisors, Inc. | -9.9M | $3K |
| STATE STREET CORP | -4.8M | $5.1M |
| VANGUARD GROUP INC | -3.8M | $23.1M |
| MORGAN STANLEY | -2.2M | $2.7M |
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Frequently Asked Questions
How many institutional investors hold IRWD?
As of Q1 2025, 201 institutional investors report holding IRWD (Ironwood Pharmaceuticals, Inc.) in their 13F filings.
What percentage of Ironwood Pharmaceuticals, Inc. is owned by institutions?
Institutional investors hold approximately 99.0% of Ironwood Pharmaceuticals, Inc.'s float as reported in SEC 13F filings.
Which hedge fund owns the most IRWD?
The largest institutional holder of IRWD is Sarissa Capital Management LP with $24.1M in shares.
Are institutions buying or selling IRWD?
This quarter, 40 institutions opened new positions in IRWD and 50 closed their positions.
What is 13F institutional ownership?
SEC Form 13F is a quarterly report filed by institutional investment managers with over $100M in qualifying assets. It discloses their US equity holdings, providing transparency into what the largest investors are buying and selling.
How often is institutional ownership data updated?
13F filings are due 45 days after each calendar quarter end (May 15, Aug 14, Nov 14, Feb 14). Data is updated on HedgeTrace as new filings are processed.