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JANE STREET GROUP, LLC

Position in AMPH — Amphastar Pharmaceuticals, Inc.

CIK 1595888 NEW YORK, NY

Position in AMPH

as of Mar 31, 2026 · filed May 12, 2026
Position Value
$1,811,585
-$4,014,055 QoQ
Shares Held
92,475
-57.5% QoQ
Ownership
0.210%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Dec 2021
18 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
$1,194,990
CallShares
61,000
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

JANE STREET GROUP, LLC holds $181,878,118 across 41 Drug Manufacturers - Specialty & Generic names. AMPH ranks #17 (1.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in AMPH

Export CSV
22 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $1,811,585 92,475
2026-03-31 $1,194,990 61,000
2025-12-31 $353,496 13,200
2025-12-31 $5,825,640 217,537
2025-09-30 $1,553,695 58,300
2025-09-30 $3,956,431 148,459
2025-06-30 $3,675,481 160,082
2025-03-31 $1,352,817 46,665
2024-12-31 $3,693,951 99,487
2024-09-30 $839,569 17,300
2024-09-30 $3,087,185 63,614
2024-06-30 $3,868,560 96,714
2024-03-31 $1,706,341 38,860
2023-12-31 $3,214,900 51,979
2023-09-30 $1,844,703 40,111
2023-06-30 $966,299 16,814
2023-03-31 $1,062,862 28,343
2022-12-31 $231,136 8,249
2022-09-30 $1,047,989 37,295
2022-06-30 $611,782 17,585
2022-03-31 $333,008 9,276
2021-12-31 $451,034 19,366