Marshall Wace
IRWD icon

Marshall Wace’s Ironwood Pharmaceuticals IRWD Stock Holding History

Marshall Wace’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 		$15.9M Buy
4,525,064
+101,062
+2% +$414K 0.02% 784
2025
Q4 		$14.9M Buy
4,424,002
+1,279,863
+41% +$3.32M 0.01% 734
2025
Q3 		$4.12M Sell
3,144,139
-849,418
-21% -$879K ﹤0.01% 1261
2025
Q2 		$2.88M Buy
3,993,557
+3,436,036
+616% +$2.7M ﹤0.01% 1397
2025
Q1 		$820K Buy
+557,521
New +$1.33M ﹤0.01% 1868
2024
Q3 		– Sell
-217,218
Closed -$1.42M – 2732
2024
Q2 		$1.42M Sell
217,218
-355,282
-62% -$2.51M ﹤0.01% 1527
2024
Q1 		$4.99M Buy
572,500
+284,680
+99% +$3.45M 0.01% 1000
2023
Q4 		$3.29M Buy
287,820
+140,075
+95% +$1.39M 0.01% 1049
2023
Q3 		$1.42M Buy
+147,745
New +$1.45M ﹤0.01% 1371
2021
Q3 		– Sell
-418,870
Closed -$5.39M – 3220
2021
Q2 		$5.39M Buy
418,870
+405,520
+3,038% +$4.64M 0.02% 796
2021
Q1 		$149K Buy
+13,350
New +$141K ﹤0.01% 2315
2020
Q4 		– Sell
-174,084
Closed -$1.56M – 2021
2020
Q3 		$1.56M Buy
174,084
+61,440
+55% +$611K 0.01% 875
2020
Q2 		$1.16M Sell
112,644
-55,652
-33% -$570K 0.01% 955
2020
Q1 		$1.7M Sell
168,296
-915,880
-84% -$10.8M 0.02% 681
2019
Q4 		$14.4M Sell
1,084,176
-18,855
-2% -$208K 0.1% 233
2019
Q3 		$9.47M Buy
1,103,031
+1,024,762
+1,309% +$9.96M 0.07% 312
2019
Q2 		$856K Sell
78,269
-69,489
-47% -$778K 0.01% 972
2019
Q1 		$1.67M Buy
+147,758
New +$1.65M 0.02% 799
2017
Q1 		– Sell
-397,551
Closed -$5.09M – 524
2016
Q4 		$5.09M Buy
+397,551
New +$5.02M 0.03% 468
2016
Q1 		– Sell
-12,233
Closed -$119K – 1103
2015
Q4 		$119K Buy
+12,233
New +$118K ﹤0.01% 941
2015
Q2 		– Sell
-51,463
Closed -$690K – 965
2015
Q1 		$690K Buy
+51,463
New +$675K 0.01% 631

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

Marshall Wace's IRWD Position: Q1 2026 in Review

Marshall Wace increased its Ironwood Pharmaceuticals (IRWD) stake by 2.3% in Q1 2026, buying an estimated $414K and bringing the position to 4,525,064 shares worth $15.9M. The position accounts for 0.02% of the portfolio, ranked #784.

Marshall Wace first reported a position in IRWD in Q1 2015 and has held it in 21 quarters since. 226 funds tracked by Wall St. Rank hold IRWD as of Q1 2026.

  • Marshall Wace held 4,525,064 shares of Ironwood Pharmaceuticals worth $15.9M as of Q1 2026.
  • Marshall Wace bought 101,062 Ironwood Pharmaceuticals shares in Q1 2026, an estimated $414K.
  • Ironwood Pharmaceuticals made up 0.02% of Marshall Wace's portfolio in Q1 2026, its #784 holding.
  • Marshall Wace first reported a position in Ironwood Pharmaceuticals in Q1 2015 and has held it in 21 quarters since.
  • 226 funds tracked by Wall St. Rank held Ironwood Pharmaceuticals as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.