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Who owns Ironwood Pharmaceuticals (IRWD) stock

198 funds reported Ironwood Pharmaceuticals (IRWD) shares in their latest 13F filings, worth $714M in all. The largest holder is BlackRock ($74.9M). Last quarter 88 funds added to their stakes and 113 cut them.

Largest holders of IRWD (13F)Largest holders of IRWD (13F)BlackRock$74.9MArmistice Capital, LLC$58.7MVanguard Group$53.8MSarissa Capital Management LP$38.7MState Street$37.1MBank of America$36.6MRenaissance Technologies LLC$33.7MVanguard Capital Management LLC$27.8MAQR Capital Management LLC$27.2MAcadian Asset Management LLC$24.6M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock17,788,557$74.9Mincrease2026-06-30
Armistice Capital, LLC13,932,000$58.7Mdecrease2026-06-30
Vanguard Group15,958,196$53.8Mdecrease2025-12-31
Sarissa Capital Management LP9,188,635$38.7Munchanged2026-06-30
State Street8,809,601$37.1Mincrease2026-06-30
Bank of America8,683,803$36.6Mincrease2026-06-30
Renaissance Technologies LLC7,993,226$33.7Mdecrease2026-06-30
Vanguard Capital Management LLC6,608,508$27.8Mincrease2026-06-30
AQR Capital Management LLC6,465,921$27.2Mdecrease2026-06-30
Acadian Asset Management LLC5,853,331$24.6Mdecrease2026-06-30
Vanguard Portfolio Management LLC5,513,355$23.2Mdecrease2026-06-30
Geode Capital Management, LLC4,831,657$20.3Mincrease2026-06-30
Two Sigma Investments, LP4,556,089$19.2Mdecrease2026-06-30
Marshall Wace, LLP4,290,093$18.1Mdecrease2026-06-30
Jacobs Levy Equity Management4,065,964$17.1Mincrease2026-06-30

Ironwood Pharmaceuticals' latest quarter

Ironwood Pharmaceuticals, Q3 2026: revenue $133M (+9% year over year), operating margin 70.0%, net earnings $59.8M, operating cash flow $67.4M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most IRWD stock?

By the latest 13F filings: BlackRock ($74.9M); Armistice Capital, LLC ($58.7M); Vanguard Group ($53.8M); Sarissa Capital Management LP ($38.7M); State Street ($37.1M).

What is the short interest in IRWD?

15,887,553 shares were sold short at the 2026-10-15 settlement, 2.05% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.