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Cubist Systematic Strategies’s Ironwood Pharmaceuticals IRWD Stock Holding History

Cubist Systematic Strategies’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
2025
Q3 		$70.7K Buy
+53,995
New +$55.9K ﹤0.01% 2817
2024
Q1 		– Sell
-472,990
Closed -$5.41M – 3991
2023
Q4 		$5.41M Buy
472,990
+314,124
+198% +$3.11M 0.04% 825
2023
Q3 		$1.53M Sell
158,866
-94,959
-37% -$931K 0.01% 1568
2023
Q2 		$2.7M Sell
253,825
-371,548
-59% -$3.99M 0.02% 1271
2023
Q1 		$6.58M Buy
625,373
+319,872
+105% +$3.58M 0.04% 733
2022
Q4 		$3.79M Sell
305,501
-20,999
-6% -$238K 0.02% 1279
2022
Q3 		$3.38M Buy
326,500
+60,248
+23% +$683K 0.02% 1456
2022
Q2 		$3.07M Buy
266,252
+244,641
+1,132% +$2.88M 0.02% 1432
2022
Q1 		$272K Sell
21,611
-173,326
-89% -$1.99M ﹤0.01% 2894
2021
Q4 		$2.27M Sell
194,937
-76,124
-28% -$934K 0.02% 1250
2021
Q3 		$3.54M Buy
271,061
+192,427
+245% +$2.49M 0.04% 658
2021
Q2 		$1.01M Buy
78,634
+1,205
+2% +$13.8K 0.01% 1567
2021
Q1 		$866K Buy
77,429
+6,814
+10% +$72K 0.01% 1625
2020
Q4 		$804K Buy
70,615
+12,052
+21% +$132K 0.01% 1517
2020
Q3 		$527K Sell
58,563
-15,687
-21% -$156K 0.01% 1713
2020
Q2 		$766K Sell
74,250
-55,488
-43% -$568K 0.01% 1340
2020
Q1 		$1.31M Sell
129,738
-69,029
-35% -$811K 0.04% 670
2019
Q4 		$2.65M Buy
198,767
+171,037
+617% +$1.89M 0.05% 600
2019
Q3 		$238K Sell
27,730
-22,649
-45% -$220K ﹤0.01% 1682
2019
Q2 		$551K Sell
50,379
-183,027
-78% -$2.05M 0.01% 1417
2019
Q1 		$2.65M Buy
233,406
+130,434
+127% +$1.46M 0.09% 328
2018
Q4 		$893K Buy
102,972
+93,305
+965% +$1.07M 0.04% 616
2018
Q3 		$149K Buy
+9,667
New +$153K 0.01% 1500
2018
Q1 		– Sell
-37,010
Closed -$465K – 1948
2017
Q4 		$465K Buy
+37,010
New +$483K 0.02% 948
2017
Q2 		– Sell
-3,504
Closed -$50K – 1773
2017
Q1 		$50K Sell
3,504
-5,951
-63% -$81.4K ﹤0.01% 1473
2016
Q4 		$121K Buy
+9,455
New +$119K 0.01% 1432
2016
Q3 		– Sell
-1,737
Closed -$19K – 1768
2016
Q2 		$19K Sell
1,737
-60,543
-97% -$592K ﹤0.01% 1640
2016
Q1 		$571K Buy
62,280
+54,900
+744% +$453K 0.03% 704
2015
Q4 		$72K Sell
7,380
-20,418
-73% -$197K ﹤0.01% 1554
2015
Q3 		$243K Buy
27,798
+13,403
+93% +$125K 0.01% 1365
2015
Q2 		$145K Sell
14,395
-5,039
-26% -$58.6K 0.01% 1553
2015
Q1 		$260K Buy
19,434
+18,874
+3,370% +$248K 0.01% 1353
2014
Q4 		$7K Sell
560
-23,214
-98% -$266K ﹤0.01% 1835
2014
Q3 		$258K Buy
23,774
+16,702
+236% +$191K 0.02% 1194
2014
Q2 		$91K Buy
+7,072
New +$76.9K 0.01% 1336

Other funds holding IRWD

AC
Armistice Capital New York $5.62B AUM 36.06% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
SCM
Sarissa Capital Management Greenwich, Connecticut $158M AUM 103.7% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 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
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
KCM
Kynam Capital Management Princeton, New Jersey $1.62B AUM 138.67% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return

Cubist Systematic Strategies's IRWD Position: Q3 2025 in Review

Cubist Systematic Strategies opened a new position in Ironwood Pharmaceuticals (IRWD) in Q3 2025: 53,995 shares worth $70.7K. The stake represents ﹤0.01% of the portfolio and ranks #2817 among its holdings. This is a return to the name: Cubist Systematic Strategies previously reported a position in IRWD as recently as Q4 2023.

Cubist Systematic Strategies first reported a position in IRWD in Q2 2014 and has held it in 35 quarters since. The position peaked at $6.58M in Q1 2023. 166 funds tracked by Wall St. Rank hold IRWD as of Q3 2025.

  • Cubist Systematic Strategies held 53,995 shares of Ironwood Pharmaceuticals worth $70.7K as of Q3 2025.
  • Ironwood Pharmaceuticals was a new Cubist Systematic Strategies position in Q3 2025.
  • Ironwood Pharmaceuticals made up ﹤0.01% of Cubist Systematic Strategies's portfolio in Q3 2025, its #2817 holding.
  • Cubist Systematic Strategies first reported a position in Ironwood Pharmaceuticals in Q2 2014 and has held it in 35 quarters since.
  • Cubist Systematic Strategies's Ironwood Pharmaceuticals position peaked at $6.58M in Q1 2023.
  • 166 funds tracked by Wall St. Rank held Ironwood Pharmaceuticals as of Q3 2025.

Based on Cubist Systematic Strategies's 13F filing for Q3 2025, filed 14 Nov 2025.