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D. E. Shaw & Co., Inc.

Position in IRWD — Ironwood Pharmaceuticals Inc

CIK 1009207 New York, NY

Position in IRWD

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$517,438
+$349,176 QoQ
Shares Held
122,907
+156.4% QoQ
Ownership
0.074%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#88
of 212 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 99% Shared 0% None 1%

Common Shares in IRWD Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Jun 30, 2026

D. E. Shaw & Co., Inc. holds $657,589,731 across 42 Drug Manufacturers - Specialty & Generic names. IRWD ranks #38 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in IRWD

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $517,438 122,907
2026-03-31 $168,262 47,938
2025-12-31 $395,793 117,446
2025-09-30 $487,673 372,270
2025-06-30 $1,202,139 1,669,639
2025-03-31 $161,294 109,724
2024-12-31 $300,145 67,753
2024-09-30 $1,008,084 244,681
2024-06-30 $2,509,867 384,949
2024-03-31 $2,514,167 288,653
2023-12-31 $2,620,103 229,030
2023-09-30 $4,201,212 436,263
2023-06-30 $9,778,138 918,998
2023-03-31 $8,423,605 800,723
2022-12-31 $7,773,311 627,386
2022-09-30 $5,775,015 557,434
2022-06-30 $8,663,975 751,429
2022-03-31 $14,924,685 1,186,382
2021-12-31 $10,308,535 884,094
2021-09-30 $17,310,075 1,325,427
2021-06-30 $12,667,143 984,238
2021-03-31 $17,005,227 1,521,040
2020-12-31 $24,365,795 2,139,227
2020-09-30 $16,616,261 1,848,305
2020-06-30 $17,690,409 1,714,187
2020-03-31 $16,838,080 1,668,789