Arrowstreet Capital
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Arrowstreet Capital’s Ironwood Pharmaceuticals IRWD Stock Holding History

Arrowstreet Capital’s Portfolio IRWD Stock Details IRWD Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$12.7M Sell
3,017,089
-380,153
-11% -$1.47M 0.01% 1001
2026
Q1 		$11.9M Buy
3,397,242
+2,985,181
+724% +$12.2M 0.01% 890
2025
Q4 		$1.39M Buy
+412,061
New +$1.07M ﹤0.01% 1487
2024
Q2 		– Sell
-175,777
Closed -$1.53M – 1650
2024
Q1 		$1.53M Buy
175,777
+11,230
+7% +$136K ﹤0.01% 1211
2023
Q4 		$1.88M Buy
164,547
+48,658
+42% +$481K ﹤0.01% 981
2023
Q3 		$1.12M Buy
115,889
+92,524
+396% +$907K ﹤0.01% 962
2023
Q2 		$249K Buy
+23,365
New +$251K ﹤0.01% 1139
2022
Q1 		– Sell
-275,640
Closed -$3.21M – 1371
2021
Q4 		$3.21M Sell
275,640
-460,081
-63% -$5.64M ﹤0.01% 913
2021
Q3 		$9.61M Buy
+735,721
New +$9.51M 0.01% 756
2021
Q1 		– Sell
-374,569
Closed -$4.27M – 2374
2020
Q4 		$4.27M Buy
+374,569
New +$4.1M 0.01% 1259
2020
Q3 		– Sell
-28,549
Closed -$295K – 2414
2020
Q2 		$295K Buy
28,549
+13,449
+89% +$138K ﹤0.01% 2109
2020
Q1 		$152K Sell
15,100
-466,524
-97% -$5.48M ﹤0.01% 1760
2019
Q4 		$6.41M Buy
+481,624
New +$5.31M 0.01% 781
2016
Q4 		– Sell
-654,665
Closed -$8.71M – 2081
2016
Q3 		$8.71M Buy
+654,665
New +$7.65M 0.03% 491
2013
Q4 		– Sell
-18,096
Closed -$180K – 1223
2013
Q3 		$180K Buy
+18,096
New +$178K ﹤0.01% 900

Other funds holding IRWD

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AC
Armistice Capital New York $8.17B AUM 68.82% 1-Year Est. Return
SCM
Sarissa Capital Management Greenwich, Connecticut $178M AUM 118.43% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Arrowstreet Capital's IRWD Position: Q2 2026 in Review

Arrowstreet Capital reduced its Ironwood Pharmaceuticals (IRWD) stake by 11% in Q2 2026, selling an estimated $1.47M and leaving 3,017,089 shares worth $12.7M. The position accounts for 0.01% of the portfolio, ranked #1001.

Arrowstreet Capital first reported a position in IRWD in Q3 2013 and has held it in 15 quarters since. 212 funds tracked by Wall St. Rank hold IRWD as of Q2 2026.

  • Arrowstreet Capital held 3,017,089 shares of Ironwood Pharmaceuticals worth $12.7M as of Q2 2026.
  • Arrowstreet Capital sold 380,153 Ironwood Pharmaceuticals shares in Q2 2026, an estimated $1.47M.
  • Ironwood Pharmaceuticals made up 0.01% of Arrowstreet Capital's portfolio in Q2 2026, its #1001 holding.
  • Arrowstreet Capital first reported a position in Ironwood Pharmaceuticals in Q3 2013 and has held it in 15 quarters since.
  • 212 funds tracked by Wall St. Rank held Ironwood Pharmaceuticals as of Q2 2026.

Based on Arrowstreet Capital's 13F filing for Q2 2026, filed 13 Aug 2026.