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CITADEL ADVISORS LLC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1423053 MIAMI, FL

Position in AMPH

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$1,283,928
-$4,841,300 QoQ
Shares Held
65,540
-71.3% QoQ
Ownership
0.149%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in AMPH Over Time

Shares Held

Position Value (USD)

Derivatives in AMPH

reported options exposure · as of Mar 31, 2026
CallValue
$389,841
CallShares
19,900
PutValue
$0
PutShares
0

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

CITADEL ADVISORS LLC holds $927,090,430 across 59 Drug Manufacturers - Specialty & Generic names. AMPH ranks #34 (0.1% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in AMPH

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $1,283,928 65,540
2026-03-31 $389,841 19,900
2025-12-31 $329,394 12,300
2025-12-31 $6,125,228 228,724
2025-09-30 $402,415 15,100
2025-09-30 $6,043,552 226,775
2025-09-30 $317,135 11,900
2025-06-30 $282,408 12,300
2025-06-30 $420,168 18,300
2025-06-30 $6,712,240 292,345
2025-03-31 $336,284 11,600
2025-03-31 $602,992 20,800
2025-03-31 $4,521,830 155,979
2024-12-31 $293,327 7,900
2024-12-31 $5,213,534 140,413
2024-12-31 $452,986 12,200
2024-09-30 $6,563,050 135,237
2024-09-30 $1,193,838 24,600
2024-09-30 $169,855 3,500
2024-06-30 $176,000 4,400
2024-06-30 $10,526,040 263,151
2024-06-30 $296,000 7,400
2024-03-31 $2,972,574 67,697
2024-03-31 $654,259 14,900
2024-03-31 $535,702 12,200
2023-12-31 $7,186,907 116,199
2023-12-31 $531,910 8,600
2023-12-31 $698,905 11,300
2023-09-30 $101,178 2,200
2023-09-30 $5,919,602 128,715
2023-09-30 $423,108 9,200
2023-06-30 $229,880 4,000
2023-06-30 $10,226,786 177,950
2023-06-30 $396,543 6,900
2023-03-31 $1,175,287 31,341
2023-03-31 $120,000 3,200
2023-03-31 $213,750 5,700
2022-12-31 $1,191,045 42,507
2022-12-31 $42,030 1,500
2022-12-31 $226,962 8,100
2022-09-30 $595,720 21,200
2022-09-30 $4,924,945 175,265
2022-06-30 $1,161,986 33,400
2022-06-30 $1,440,236 41,398
2022-06-30 $427,917 12,300
2022-03-31 $502,600 14,000
2022-03-31 $319,510 8,900
2022-03-31 $8,539,999 237,883
2021-12-31 $4,972,926 213,522
2021-06-30 $491,359 24,373