Ironwood Pharmaceuticals Ownership | Who Owns Ironwood Pharmaceuticals?
Ironwood Pharmaceuticals Ownership Summary
Ironwood Pharmaceuticals is owned by 96.46% institutional investors, 2.53% insiders, and 1.01% retail investors. Blackrock is the largest institutional shareholder, holding 14.51% of IRWD shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.66% of its assets in Ironwood Pharmaceuticals shares.
IRWD Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Ironwood Pharmaceuticals | 96.46% | 2.53% | 1.01% |
| Sector | Healthcare Stocks | 279.18% | 10.62% | -189.80% |
| Industry | Specialty & Generic Drug Manufacturers Stocks | 2774.71% | 11.85% | -2686.56% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 22.88M | 14.51% | $149.16M |
| Blackrock funding, inc. /de | 23.04M | 14.42% | $102.06M |
| Vanguard group | 19.54M | 12.23% | $86.56M |
| Sarissa capital management lp | 16.39M | 10.26% | $72.61M |
| Pacer advisors | 11.73M | 7.35% | $51.97M |
| Armistice capital | 9.47M | 5.93% | $41.94M |
| State street | 9.24M | 5.86% | $60.26M |
| Renaissance | 9.07M | 5.68% | $40.16M |
| Braidwell lp | 5.44M | 3.41% | $24.10M |
| Morgan stanley | 4.86M | 3.08% | $31.69M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Sarissa capital management lp | 16.39M | 22.49% | $72.61M |
| Kynam capital management, lp | 4.69M | 1.23% | $20.76M |
| Sio capital management | 907.78K | 1.13% | $4.02M |
| Braidwell lp | 5.44M | 0.71% | $24.10M |
| Armistice capital | 9.47M | 0.57% | $41.94M |
| Parkman healthcare partners | 408.54K | 0.24% | $1.81M |
| Jacobs levy equity management | 4.36M | 0.12% | $28.42M |
| Entrypoint capital | 62.91K | 0.12% | $278.70K |
| Pacer advisors | 11.73M | 0.11% | $51.97M |
| Old west investment management | 62.12K | 0.11% | $275.19K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Morgan stanley | 4.86M | 0.00% | 2.18M |
| Armistice capital | 9.47M | 0.57% | 1.27M |
| Millennium management | 2.18M | 0.00% | 1.25M |
| Ubs group | 2.18M | 0.00% | 1.23M |
| Point72 asset management | 1.15M | 0.01% | 1.15M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| State street | 9.24M | 0.00% | -4.67M |
| Brown capital management | - | - | -2.58M |
| Vanguard group | 19.54M | 0.00% | -2.50M |
| Glenmede trust co na | - | - | -1.40M |
| Blackrock | 22.88M | 0.00% | -1.28M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Point72 asset management | 1.15M | 0.01% | 1.15M | $5.10M |
| Sio capital management | 907.78K | 1.13% | 907.78K | $4.02M |
| Federated hermes | 370.48K | 0.00% | 370.48K | $1.64M |
| Norges bank | 252.29K | 0.00% | 252.29K | $1.12M |
| Voleon capital management lp | 82.73K | 0.03% | 82.73K | $366.49K |
Sold Out
| Holder | Change |
|---|---|
| Natixis | -2.00 |
| Sjs investment consulting | -5.00 |
| Jfs wealth advisors | -10.00 |
| Mendota financial group | -11.00 |
| Dinuzzo private wealth | -15.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2025 | 201 | -11.45% | 155,281,777 | -5.40% | 96 | 0.91% | 104 | -11.86% | 62 | -18.42% |
| Dec 31, 2024 | 213 | -3.62% | 155,039,542 | -4.94% | 97 | 0.93% | 110 | 4.76% | 71 | -7.79% |
| Sep 30, 2024 | 220 | -4.76% | 163,072,766 | -4.90% | 102 | 0.86% | 104 | -9.57% | 77 | -2.53% |
| Jun 30, 2024 | 231 | -19.23% | 171,479,228 | -0.14% | 108 | 0.92% | 115 | -22.30% | 79 | -3.66% |
| Mar 31, 2024 | 286 | 8.75% | 171,721,700 | 4.08% | 108 | 0.97% | 148 | 21.31% | 82 | -10.87% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 9.06M | 5.66% | - |
| Vanguard Total Stock Mkt Idx Inv | 4.19M | 2.59% | - |
| Vanguard US Total Market Shares ETF | 4.18M | 2.59% | - |
| iShares Russell 2000 ETF | 3.73M | 2.30% | 1.83K |
| SPDR® S&P Biotech ETF | 2.51M | 1.57% | -15.31K |
| Vanguard Strategic Equity Inv | 2.45M | 1.51% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 2.25M | 1.39% | - |
| Vanguard Explorer Inv | 2.23M | 1.38% | - |
| Vanguard Small Cap Index | 1.74M | 1.09% | 1.41K |
| Pacer US Small Cap Cash Cows 100 ETF | 1.46M | 0.90% | -4.56K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 16, 2025 | MCCOURT Thomas A | Chief Executive Officer | Sell | $7.74K |
| May 16, 2025 | Gaskins Tammi L | Chief Commercial Officer | Sell | $1.49K |
| Feb 10, 2025 | MCCOURT Thomas A | Chief Executive Officer | Sell | $244.75K |
| Feb 10, 2025 | Silver Ronald | Principal Accounting Officer | Sell | $21.20K |
| Feb 10, 2025 | Shetzline Michael | SVP, CMO, Head-Res&Drug | Sell | $72.63K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | 2 |
| 2025 Q1 | - | 5 |
| 2024 Q4 | - | 2 |
| 2024 Q3 | - | 2 |
| 2024 Q2 | - | 7 |
IRWD Ownership FAQ
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