IRONWOOD PHARMACEUTICALS INC (IRWD)
Institutional ownership reported to the SEC as of Q2 2026, across 31 quarters.
205
Reporting holders
$662.0M
Reported value
94.5%
Of shares outstanding
0.7%
Held as options
-12
Holder change
Institutions report 156,134,768 shares against 165,239,947 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end. A figure this high can overstate: where an adviser and a sub-adviser both report the same shares, both are counted.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $74.9M | 17,788,557 | 0.00% | 8q | +33.1%+$18.6M |
| ARMISTICE CAPITAL, LLC | $58.7M | 13,932,000 | 0.72% | 12q | -7.3%-$4.6M |
| Sarissa Capital Management LP | $38.7M | 9,188,635 | 21.75% | 31q | HELD |
| STATE STREET CORP | $37.1M | 8,809,601 | 0.00% | 31q | +18.1%+$5.7M |
| BANK OF AMERICA CORP /DE/ | $36.6M | 8,683,803 | 0.00% | 31q | HELD |
| RENAISSANCE TECHNOLOGIES LLC | $33.7M | 7,993,226 | 0.05% | 28q | -0.8%-$285.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | $27.8M | 6,608,508 | 0.00% | 2q | +8.4%+$2.2M |
| AQR CAPITAL MANAGEMENT LLC | $27.2M | 6,465,921 | 0.01% | 30q | -14.2%-$4.5M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $23.2M | 5,513,355 | 0.00% | 2q | -17.5%-$4.9M |
| GEODE CAPITAL MANAGEMENT, LLC | $20.3M | 4,831,657 | 0.00% | 31q | +6.3%+$1.2M |
| TWO SIGMA INVESTMENTS, LP | $19.2M | 4,556,089 | 0.01% | 18q | -22.1%-$5.4M |
| MARSHALL WACE, LLP | $18.1M | 4,290,093 | 0.01% | 6q | -5.2%-$989.2K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $17.1M | 4,065,964 | 0.06% | 12q | +11.9%+$1.8M |
| GOLDMAN SACHS GROUP INC | $14.0M | 3,313,808 | 0.00% | 31q | +23.2%+$2.6M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $13.9M | 3,302,242 | 0.00% | 31q | -30.3%-$6.0M |
| Sixth Street Partners Management Company, L.P. | $13.9M | 3,302,242 | 0.00% | new | NEW |
| FEDERATED HERMES, INC. | $13.6M | 3,231,238 | 0.02% | 7q | -3.5%-$495.0K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $12.7M | 3,017,089 | 0.01% | 3q | -11.2%-$1.6M |
| DIMENSIONAL FUND ADVISORS LP | $10.6M | 2,522,891 | 0.00% | 27q | +21.2%+$1.9M |
| MACKENZIE FINANCIAL CORP | $10.0M | 2,367,493 | 0.01% | 15q | +322.7%+$7.6M |
| MORGAN STANLEY | $7.8M | 1,859,914 | 0.00% | 35q | +125.5%+$4.4M |
| Connor, Clark & Lunn Investment Management Ltd. | $7.6M | 1,811,714 | 0.01% | 9q | -1.3%-$99.8K |
| NORTHERN TRUST CORP | $5.8M | 1,373,974 | 0.00% | 31q | +8.5%+$455.2K |
| Hillsdale Investment Management Inc. | $5.3M | 1,250,428 | 0.12% | 3q | +1.1%+$58.1K |
| WELLS FARGO & COMPANY/MN | $5.1M | 1,206,198 | 0.00% | 31q | +924.8%+$4.6M |
| DEUTSCHE BANK AG\ | $4.9M | 1,158,138 | 0.00% | 34q | +2.9%+$139.6K |
| VANGUARD FIDUCIARY TRUST CO | $4.4M | 1,040,335 | 0.00% | 2q | +5.2%+$217.7K |
| FRANKLIN RESOURCES INC | $4.2M | 1,006,979 | 0.00% | 19q | +35.2%+$1.1M |
| FMR LLC | $3.8M | 909,488 | 0.00% | 31q | +15.1%+$501.4K |
| STATE OF WISCONSIN INVESTMENT BOARD | $3.3M | 778,515 | 0.01% | 3q | +30.2%+$759.3K |
| RAYMOND JAMES FINANCIAL INC | $3.1M | 725,085 | 0.00% | 7q | -5.1%-$163.6K |
| RITHOLTZ WEALTH MANAGEMENT | $3.0M | 720,188 | 0.02% | 2q | +722.7%+$2.7M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $2.9M | 129,237 | 0.00% | 31q | -91.2%-$29.9M |
| CITADEL ADVISORS LLC | $2.8M | 502,403 | 0.00% | 16q | +324.8%+$2.2M |
| VICTORY CAPITAL MANAGEMENT INC | $2.8M | 658,457 | 0.00% | 28q | -7.7%-$230.4K |
| Inspire Investing, LLC | $2.7M | 630,072 | 0.11% | 2q | +23.6%+$505.8K |
| IEQ CAPITAL, LLC | $2.4M | 561,588 | 0.01% | 6q | -24.4%-$762.6K |
| Vanguard Global Advisers, LLC | $2.4M | 561,038 | 0.00% | 2q | -5.1%-$128.2K |
| PRUDENTIAL FINANCIAL INC | $2.3M | 537,199 | 0.00% | 31q | +19.4%+$367.8K |
| Bank of New York Mellon Corp | $2.1M | 508,880 | 0.00% | 31q | +5.1%+$104.6K |
| VOYA INVESTMENT MANAGEMENT LLC | $2.0M | 484,450 | 0.00% | 31q | +232.2%+$1.4M |
| WELLINGTON MANAGEMENT GROUP LLP | $2.0M | 468,821 | 0.00% | 3q | +3.4%+$64.4K |
| SEI INVESTMENTS CO | $1.9M | 459,417 | 0.00% | 8q | -38.1%-$1.2M |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $1.8M | 438,911 | 0.01% | 3q | +242.2%+$1.3M |
| WEDGE CAPITAL MANAGEMENT L L P/NC | $1.8M | 435,650 | 0.03% | 2q | -19.4%-$441.4K |
| SEGALL BRYANT & HAMILL, LLC | $1.7M | 408,064 | 0.02% | 2q | +46.7%+$546.7K |
| Invesco Ltd. | $1.7M | 403,209 | 0.00% | 28q | -26.3%-$606.9K |
| Man Group plc | $1.7M | 392,117 | 0.00% | 3q | -27.5%-$626.2K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $1.6M | 389,793 | 0.03% | 10q | -11.5%-$213.4K |
| UBS Group AG | $1.6M | 389,529 | 0.00% | 31q | -58.3%-$2.3M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $1.6M | 375,288 | 0.00% | 2q | HELD |
| Nuveen, LLC | $1.5M | 355,372 | 0.00% | 3q | +52.3%+$513.5K |
| CM Management, LLC | $1.5M | 350,000 | 0.94% | 2q | HELD |
| Qube Research & Technologies Ltd | $1.5M | 347,985 | 0.00% | 8q | -78.1%-$5.2M |
| Robeco Institutional Asset Management B.V. | $1.4M | 342,998 | 0.00% | 14q | HELD |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $1.4M | 342,293 | 0.01% | 30q | -32.8%-$702.9K |
| Virtus Investment Advisers, LLC | $1.3M | 318,598 | 0.31% | 3q | +318.3%+$1.0M |
| CWA Asset Management Group, LLC | $1.2M | 290,366 | 0.04% | new | NEW |
| GLOBEFLEX CAPITAL L P | $1.1M | 259,809 | 0.14% | 2q | HELD |
| MERCER GLOBAL ADVISORS INC /ADV | $1.1M | 252,320 | 0.00% | 5q | +119.3%+$577.8K |
| CITIGROUP INC | $954.9K | 226,824 | 0.00% | 31q | +475.6%+$789.0K |
| Russell Investments Group, Ltd. | $946.5K | 224,821 | 0.00% | 29q | -14.1%-$155.6K |
| JPMORGAN CHASE & CO | $914.1K | 212,575 | 0.00% | 31q | +79.9%+$405.9K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $913.3K | 219,445 | 0.00% | 7q | -3.2%-$30.1K |
| Cerity Partners LLC | $875.8K | 208,019 | 0.00% | 6q | -43.5%-$675.1K |
| RHUMBLINE ADVISERS | $863.4K | 205,095 | 0.00% | 31q | +6.3%+$51.2K |
| MARTINGALE ASSET MANAGEMENT L P | $863.0K | 204,991 | 0.02% | 2q | HELD |
| SIMPLEX TRADING, LLC | $860.5K | options only | 0.00% | 2q | OPTIONS |
| Cercano Management LLC | $853.6K | 202,756 | 0.05% | 8q | +100.0%+$426.8K |
| EVOLVE PRIVATE WEALTH, LLC | $786.7K | 186,864 | 0.05% | 3q | +1108.1%+$721.6K |
| Vident Advisory, LLC | $761.7K | 180,929 | 0.01% | 2q | -1.8%-$14.3K |
| Creative Planning | $745.3K | 177,030 | 0.00% | 21q | HELD |
| KLP KAPITALFORVALTNING AS | $733.4K | 174,200 | 0.00% | 7q | HELD |
| Mariner, LLC | $709.3K | 168,472 | 0.00% | 18q | -18.9%-$165.5K |
| GROUP ONE TRADING LLC | $674.0K | options only | 0.00% | 4q | OPTIONS |
| OMERS ADMINISTRATION Corp | $669.4K | 159,010 | 0.00% | 9q | -29.7%-$283.3K |
| Rafferty Asset Management, LLC | $643.6K | 152,878 | 0.00% | 3q | -29.4%-$268.4K |
| Quantinno Capital Management LP | $634.0K | 150,604 | 0.00% | 3q | +16.1%+$88.0K |
| JANE STREET GROUP, LLC | $613.0K | 129,700 | 0.00% | 25q | -79.2%-$2.3M |
| ALLIANCEBERNSTEIN L.P. | $581.9K | 165,790 | 0.00% | 31q | HELD |
| FIFTH THIRD BANCORP | $558.9K | 132,748 | 0.00% | 2q | -19.6%-$136.2K |
| CANADA PENSION PLAN INVESTMENT BOARD | $551.1K | 130,900 | 0.00% | 3q | -3.0%-$17.3K |
| HSBC HOLDINGS PLC | $541.6K | 126,100 | 0.00% | 3q | +324.5%+$414.0K |
| Arax Advisory Partners | $534.5K | 126,966 | 0.00% | 4q | +7355.4%+$527.4K |
| D. E. Shaw & Co., Inc. | $517.4K | 122,907 | 0.00% | 31q | +156.4%+$315.6K |
| Optimist Retirement Group LLC | $429.6K | 102,054 | 0.17% | 3q | +7.6%+$30.4K |
| State of Wyoming | $428.5K | 101,781 | 0.04% | 22q | -20.6%-$111.1K |
| BARCLAYS PLC | $421.5K | 100,123 | 0.00% | 31q | +11.3%+$42.7K |
| AMERIPRISE FINANCIAL INC | $419.0K | 99,526 | 0.00% | 22q | -49.9%-$417.4K |
| Engineers Gate Manager LP | $412.8K | 98,052 | 0.01% | 6q | +22.8%+$76.6K |
| MetLife Investment Management, LLC | $405.0K | 96,208 | 0.00% | 4q | +50.9%+$136.6K |
| Integrated Quantitative Investments LLC | $394.4K | 93,689 | 0.06% | 3q | -83.0%-$1.9M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $393.9K | 93,191 | 0.00% | 9q | +3.4%+$13.0K |
| FULLER & THALER ASSET MANAGEMENT, INC. | $380.3K | 90,321 | 0.00% | 2q | -0.8%-$3.2K |
| Merit Financial Group, LLC | $377.2K | 89,598 | 0.00% | 6q | +63.8%+$146.9K |
| WINTON GROUP Ltd | $354.3K | 84,156 | 0.01% | 3q | -65.2%-$663.5K |
| Allspring Global Investments Holdings, LLC | $339.1K | 82,315 | 0.00% | 2q | +3.9%+$12.9K |
| PROFUND ADVISORS LLC | $327.3K | 77,754 | 0.01% | 3q | -20.1%-$82.2K |
| SmartHarvest Portfolios, LLC | $317.7K | 75,462 | 0.10% | 3q | HELD |
| Pallas Capital Advisors LLC | $311.5K | 73,996 | 0.01% | 6q | -8.2%-$27.7K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Armistice Capital, LLCwith 1 co-filers | 8.4% |
| 2026-08-07 | 13G | STATE STREET CORPORATION | 5.4% |
| 2026-07-28 | 13G/A | BlackRock, Inc. | 8.1% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 205 | $662.0M | 156,134,768 | 23 | 69 | 75 | 0.7% |
| Q1 2026 | 217 | $578.8M | 152,704,059 | 49 | 79 | 53 | 7.4% |
| Q4 2025 | 186 | $534.3M | 147,150,819 | 50 | 52 | 44 | 7.4% |
| Q3 2025 | 154 | $200.3M | 141,624,785 | 27 | 47 | 42 | 7.4% |
| Q2 2025 | 145 | $105.5M | 135,884,904 | 19 | 54 | 48 | 7.6% |
| Q1 2025 | 184 | $233.2M | 147,458,857 | 27 | 69 | 55 | 7.1% |
| Q4 2024 | 203 | $751.6M | 158,198,529 | 31 | 68 | 65 | 6.8% |
| Q3 2024 | 194 | $687.7M | 155,669,981 | 33 | 56 | 67 | 6.7% |
| Q2 2024 | 204 | $1.1B | 165,100,397 | 18 | 81 | 71 | 6.4% |
| Q1 2024 | 238 | $1.7B | 162,428,584 | 51 | 72 | 74 | 15.3% |
| Q4 2023 | 224 | $1.8B | 153,160,150 | 26 | 74 | 74 | 1.9% |
| Q3 2023 | 211 | $1.4B | 146,625,954 | 30 | 59 | 88 | 0.5% |
| Q2 2023 | 214 | $1.6B | 150,774,345 | 25 | 94 | 64 | 0.0% |
| Q1 2023 | 210 | $1.6B | 147,682,409 | 23 | 91 | 56 | 0.0% |
| Q4 2022 | 189 | $1.7B | 137,579,370 | 25 | 65 | 59 | 0.1% |
| Q3 2022 | 239 | $1.8B | 169,745,816 | 31 | 88 | 79 | 0.0% |
| Q2 2022 | 236 | $2.0B | 175,226,005 | 57 | 67 | 77 | 0.1% |
| Q1 2022 | 214 | $2.1B | 166,608,958 | 35 | 60 | 77 | 0.0% |
| Q4 2021 | 214 | $2.0B | 172,584,717 | 21 | 64 | 74 | 0.6% |
| Q3 2021 | 226 | $2.3B | 177,433,918 | 32 | 84 | 65 | 0.7% |
| Q2 2021 | 210 | $2.3B | 174,956,864 | 33 | 72 | 63 | 0.8% |
| Q1 2021 | 208 | $1.9B | 171,145,765 | 38 | 70 | 61 | 0.6% |
| Q4 2020 | 202 | $2.0B | 171,921,976 | 37 | 64 | 61 | 1.7% |
| Q3 2020 | 188 | $1.6B | 179,158,234 | 20 | 63 | 66 | 1.1% |
| Q2 2020 | 202 | $1.9B | 178,151,561 | 32 | 85 | 51 | 1.1% |
| Q1 2020 | 192 | $1.8B | 178,633,862 | 29 | 60 | 68 | 0.4% |
| Q4 2019 | 198 | $2.4B | 179,650,034 | 42 | 54 | 65 | 0.8% |
| Q3 2019 | 165 | $1.5B | 173,765,445 | 31 | 58 | 31 | 0.9% |
| Q2 2019 | 156 | $1.8B | 161,705,125 | 31 | 61 | 30 | 1.6% |
| Q1 2019 | 159 | $2.1B | 155,204,454 | 34 | 51 | 43 | 1.5% |
| Q4 2018 | 145 | $1.6B | 151,176,056 | 4 | 3 | 2 | 1.6% |