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Of the 11 tracked institutions holding IRWD, 4 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +4.5pt. It's a gauge of who owns the name, not just how many.
Among the 11 tracked institutional investors we monitor, IRWD (IRONWOOD PHARMACEUTICALS INC) is held with a combined value of $304.33M across 76,097,085 shares. The largest holder is BlackRock, Inc. with a position worth $74.89M. 6 funds increased their holdings. 5 funds reduced their position.
Total Institutional Value
$304.33M
Total Shares Held
76,097,085
Institutional Holders
11
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $74.89M | 0.00% | +33.1% |
| 2 | ARMISTICE CAPITAL, LLC | $58.65M | 1.62% | -7.3% |
| 3 | VANGUARD GROUP INC | $53.78M | 0.00% | -0.7% |
| 4 | STATE STREET CORP | $37.09M | 0.00% | +18.1% |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $33.65M | 0.05% | -0.8% |
| 6 | AQR CAPITAL MANAGEMENT LLC | $27.22M | 0.01% | -14.2% |
| 7 | TWO SIGMA ADVISERS, LP | $10.58M | 0.02% | -5.3% |
| 8 | FMR LLC | $3.83M | 0.00% | +15.1% |
| 9 | CITADEL ADVISORS LLC | $2.12M | 0.00% | +324.8% |
| 10 | WELLINGTON MANAGEMENT GROUP LLP | $1.97M | 0.00% | +3.4% |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of IRWD with a position worth $74.89M, representing 0.00% of their portfolio. In total, 11 institutional investors hold IRWD with a combined value of $304.33M.
Institutional investors hold $304.33M worth of IRWD stock across 11 positions. The largest institutional holder is BlackRock, Inc. with $74.89M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For IRWD, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their IRWD positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-08-07 |
| 8.1% | 2026-07-28 |
SEC Schedule 13D (activist) and 13G (passive) filings for IRWD. Filed when an investor acquires 5%+ ownership.
Last Close
$3.64
2026-10-02
YTD
-14.8%
57% of 52-week range
