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
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

AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SCM
Sarissa Capital Management Greenwich, Connecticut $158M AUM 103.7% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Arrowstreet Capital's IRWD Position: Q1 2026 in Review

Arrowstreet Capital increased its Ironwood Pharmaceuticals (IRWD) stake by 724% in Q1 2026, buying an estimated $12.2M and bringing the position to 3,397,242 shares worth $11.9M. The position accounts for 0.01% of the portfolio, ranked #890.

Arrowstreet Capital first reported a position in IRWD in Q3 2013 and has held it in 14 quarters since. 226 funds tracked by Wall St. Rank hold IRWD as of Q1 2026.

  • Arrowstreet Capital held 3,397,242 shares of Ironwood Pharmaceuticals worth $11.9M as of Q1 2026.
  • Arrowstreet Capital bought 2,985,181 Ironwood Pharmaceuticals shares in Q1 2026, an estimated $12.2M.
  • Ironwood Pharmaceuticals made up 0.01% of Arrowstreet Capital's portfolio in Q1 2026, its #890 holding.
  • Arrowstreet Capital first reported a position in Ironwood Pharmaceuticals in Q3 2013 and has held it in 14 quarters since.
  • 226 funds tracked by Wall St. Rank held Ironwood Pharmaceuticals as of Q1 2026.

Based on Arrowstreet Capital's 13F filing for Q1 2026, filed 14 May 2026.