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D. E. Shaw & Co., Inc.

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1009207 New York, NY

Position in AMPH

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$13,037,966
-$1,880,261 QoQ
Shares Held
665,542
+19.5% QoQ
Ownership
1.51%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Dec 2020
19 quarters on record
Voting authority Sole 99.90984791342996.ToString("F0")% Shared 0.ToString("F0")% None 0.09015208657004366.ToString("F0")%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

D. E. Shaw & Co., Inc. holds $613,305,594 across 42 Drug Manufacturers - Specialty & Generic names. AMPH ranks #16 (2.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in AMPH

Export CSV
19 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $13,037,966 665,542
2025-12-31 $14,918,227 557,066
2025-09-30 $13,783,965 517,222
2025-06-30 $6,748,586 293,928
2025-03-31 $846,160 29,188
2024-12-31 $4,412,937 118,851
2024-09-30 $1,148,171 23,659
2023-12-31 $4,767,398 77,080
2023-09-30 $4,606,956 100,173
2023-06-30 $7,103,234 123,599
2023-03-31 $5,149,237 137,313
2022-12-31 $1,623,702 57,948
2022-09-30 $1,626,399 57,879
2022-06-30 $2,147,760 61,735
2022-03-31 $2,338,490 65,139
2021-12-31 $623,450 26,769
2021-06-30 $719,691 35,699
2021-03-31 $325,692 17,778
2020-12-31 $259,157 12,887