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IRWD — IRONWOOD PHARMACEUTICALS INC

Reported value held$404.36M
Funds holding (latest)45
SectorHealth Care
Funds holding (Q2 2026)33
Institutional value$318.24M · 75.71M sh
New / Add / Cut / Exit1 / 18 / 12 / 3
Top-5 / Top-10 concentration60.5% / 85.0%
Institutional holdings change Reducing -45.9% (-64.17M sh)
Institutional value change Down -0.2%

As of Q2 2026, 33 SEC-registered investment managers reported holding IRWD (IRONWOOD PHARMACEUTICALS INC) in their latest 13F filings, with a combined reported value of $318.24M across 75.71M shares. That is -45.9% by share count (-64.17M shares) versus the previous quarter, while reported value moved -0.2%. Ownership is concentrated: the five largest holders account for 60.5% of reported value and the top ten for 85.0%.

Compared with the prior quarter, 1 opened new positions, 18 added to existing stakes, 12 trimmed, 3 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

IRWD is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 17.79M $74.89M 0.00% Add
Vanguard Group history Q4 2025 15.96M $53.78M 0.00% Reduce
Bank of America Corp history Q2 2026 8.68M $36.56M 0.00% Hold
Renaissance Technologies history Q2 2026 7.99M $33.65M 0.05% Reduce
AQR Capital Management history Q2 2026 6.47M $27.22M 0.01% Reduce
Geode Capital Management history Q2 2026 4.83M $20.35M 0.00% Add
Two Sigma Investments history Q2 2026 4.56M $19.18M 0.01% Reduce
Marshall Wace history Q2 2026 4.29M $18.06M 0.01% Reduce
Balyasny Asset Management history Q1 2026 18.41M $18.05M 0.02% Add
Goldman Sachs Group history Q2 2026 3.31M $13.95M 0.00% Add
Charles Schwab Investment Management history Q2 2026 3.30M $13.90M 0.00% Reduce
Arrowstreet Capital history Q2 2026 3.02M $12.70M 0.01% Reduce
Morgan Stanley history Q2 2026 1.86M $7.83M 0.00% Add
First Eagle Investment Management history Q2 2024 1.10M $7.20M 0.02% Add
Northern Trust Corp history Q2 2026 1.37M $5.78M 0.00% Add
Wells Fargo & Co history Q2 2026 1.21M $5.08M 0.00% Add
Deutsche Bank AG history Q2 2026 1.16M $4.88M 0.00% Add
Franklin Resources history Q2 2026 1.01M $4.24M 0.00% Add
Fidelity Management & Research (FMR) history Q2 2026 909.49K $3.83M 0.00% Add
Citadel Advisors history Q2 2026 676.70K $2.85M 0.00% Add

View all 45 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 22.92M 23.04M 11.88M 12.02M 12.06M 12.78M 13.36M 17.79M
Bank of America Corp 403.22K 7.00K 7.00K 394.97K 650.10K 100.00K 155.00K 737.28K 797.63K 800.00K 906.29K 712.39K 419.77K 678.14K 1.43M 3.36M 11.70M 11.52M 8.68M 8.68M
Renaissance Technologies 2.21M 2.68M 3.12M 5.42M 5.37M 4.37M 4.64M 5.32M 5.80M 6.60M 7.10M 8.57M 8.60M 9.07M 9.94M 8.41M 8.35M 8.20M 8.06M 7.99M
AQR Capital Management 337.37K 429.13K 452.19K 452.67K 576.39K 659.20K 680.70K 741.44K 203.57K 81.80K 469.74K 684.58K 564.11K 396.99K 2.52M 6.17M 5.38M 4.72M 7.54M 6.47M
Geode Capital Management 2.81M 2.76M 2.76M 2.62M 2.47M 2.52M 2.63M 2.79M 2.92M 3.08M 3.15M 3.37M 3.29M 3.31M 3.42M 3.50M 3.61M 3.62M 4.54M 4.83M
Two Sigma Investments 338.63K — 888.89K 859.49K 166.26K 1.58M 1.52M 2.65M 1.39M 585.85K 1.19M 917.59K 890.96K 863.43K 1.23M 2.75M 2.53M 2.85M 5.85M 4.56M
Marshall Wace — — — — — — — — 147.75K 287.82K 572.50K 217.22K — — 557.52K 3.99M 3.14M 4.42M 4.53M 4.29M
Goldman Sachs Group 200.00K 200.00K 200.00K 200.00K 200.00K 200.00K 200.00K 994.46K 1.11M 1.08M 1.38M 1.56M 1.22M 915.27K 1.58M 1.44M 1.08M 1.28M 2.69M 3.31M
Charles Schwab Investment Management 1.44M 1.46M 1.43M 1.12M 1.02M 1.09M 1.51M 1.37M 1.23M 1.29M 1.39M 1.54M 1.90M 1.98M 2.65M 3.66M 4.92M 4.98M 4.74M 3.30M
Arrowstreet Capital 735.72K 275.64K — — — — — 23.36K 115.89K 164.55K 175.78K — — — — — — 412.06K 3.40M 3.02M
Morgan Stanley 9.00K 9.00K 9.00K 9.00K 9.00K 9.00K 9.00K 9.00K 9.00K 2.15M 2.68M 4.86M 4.32M 4.02M 1.86M 494.03K 477.10K 739.68K 824.82K 1.86M
Northern Trust Corp 1.73M 1.68M 1.62M 1.64M 1.56M 1.63M 1.64M 1.64M 1.64M 1.59M 1.53M 1.48M 1.51M 1.63M 1.41M 1.31M 1.34M 1.23M 1.27M 1.37M
Wells Fargo & Co 5.00K 5.00K 5.00K 391.00K 391.00K 391.00K 1.00K 1.00K 1.00K 1.00K 5.00K 5.00K 5.00K 5.00K 5.00K 5.00K 5.00K 5.00K 5.00K 1.21M
Deutsche Bank AG 2.00M 408.58K 672.44K 3.44M 245.00K 279.91K 1.20M 1.56M 100.00K 453.73K 1.52M 1.05M 1.06M 1.57M 1.55M 1.52M 1.53M 1.11M 1.12M 1.16M
Franklin Resources — 10.10K 12.03K 14.18K 20.31K 20.02K 22.81K 23.14K 19.76K 28.58K 311.34K 320.18K 313.05K 309.24K 306.01K 23.25K 23.25K 385.58K 744.64K 1.01M
Fidelity Management & Research (FMR) 6.24K 5.86K 42.59K 26.15K 99.48K 19.24K 18.99K 21.14K 16.06K 97.85K 89.36K 135.59K 169.68K 303.27K 479.74K 497.20K 559.95K 686.74K 790.39K 909.49K
Citadel Advisors 186.13K 428.53K 860.85K 74.69M 18.52K 101.47K 384.06K 131.59K 130.52K 643.47K 1.55M 429.63K 714.03K 576.26K 959.25K 333.67K 682.45K 371.77K 315.58K 676.70K
Prudential Financial 861.64K 532.93K 35.83K 156.40K 136.21K 135.20K 130.91K 173.06K 161.49K 158.53K 156.46K 153.94K 150.79K 145.59K 11.78K 20.64K 49.94K 141.13K 449.84K 537.20K
BNY Mellon 793.08K 1.18M 1.37M 1.97M 1.94M 300.00K 1.27M 1.27M 1.22M 1.33M 1.24M 1.24M 912.78K 978.13K 499.61K 487.18K 503.08K 510.21K 484.04K 508.88K
Wellington Management Group 520.00K 570.00K 520.00K 14.92M 13.86M 13.34M 6.18M — — 97.42K 95.09K 109.50K — — — — — 503.94K 453.51K 468.82K

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