Supply Chain Map
AMPHCIK 1297184

Amphastar Pharmaceuticals, Inc.

EDGAR filings
Customers
3
3 active
Suppliers
0
None disclosed
Largest customer
28%
COR · 3M to 2026-06-30
Named-customer revenue
$125.1M
3 customers · 3M to 2026-06-30
Latest period
Jun 30, 2026
10-Q filed 2026-08-06
SuppliersCustomersNo supplier discloses itMCK24% · $172.8MMCK · 24% of AMPH revenue · $172.8M · FY to 2025-12-31 · 10-K filed 2026-02-26COR22% · $158.4MCOR · 22% of AMPH revenue · $158.4M · FY to 2025-12-31 · 10-K filed 2026-02-26CAH19% · $136.8MCAH · 19% of AMPH revenue · $136.8M · FY to 2025-12-31 · 10-K filed 2026-02-26AMPH
Band height is the estimated dollar value: the disclosed share × the discloser's revenue for that period (latest full year where available). Thin bands are named without a figure. Click a band to open its filing.

Customers 3

Companies AMPH discloses as major customers, as a share of AMPH revenue. 3 active, 0 lapsed.

Company% of AMPH revenueEst. revenuePeriodTrendStatusSource
COR Distributor
Cencora, Inc.
 28%$51.5M 3M 2026-06-30
3M ending 2024-09-30: 21%3M ending 2025-03-31: 21%3M ending 2025-06-30: 23%3M ending 2025-09-30: 22%3M ending 2026-03-31: 21%3M ending 2026-06-30: 28%+7.0pp
Active 10-Q 2026-08-06
Cencora 30 % 28 % 28 % 23 % 25 % 22 %
10-Q filed 2026-08-06 Period 3M 2026-04-01 to 2026-06-30 (28%), 3M 2025-04-01 to 2025-06-30 (23%)Accession 0001297184-26-000047
Cencora 25 % 28 % 21 % 21 %
10-Q filed 2026-05-07 Period 3M 2026-01-01 to 2026-03-31 (21%), 3M 2025-01-01 to 2025-03-31 (21%)Accession 0001297184-26-000033
Cencora 22 % 20 % 20 %
10-K filed 2026-02-26 Period FY 2025-01-01 to 2025-12-31 (22%), FY 2024-01-01 to 2024-12-31 (20%), FY 2023-01-01 to 2023-12-31 (20%)Accession 0001297184-26-000009
Cencora 30 % 23 % 22 % 21 % 22 % 20 %
10-Q filed 2025-11-06 Period 3M 2025-07-01 to 2025-09-30 (22%), 3M 2024-07-01 to 2024-09-30 (21%)Accession 0001297184-25-000064
MCK Distributor
MCKESSON CORP
 24%$44.1M 3M 2026-06-30
3M ending 2024-09-30: 26%3M ending 2025-03-31: 24%3M ending 2025-06-30: 24%3M ending 2025-09-30: 22%3M ending 2026-03-31: 20%3M ending 2026-06-30: 24%+4.0pp
Active 10-Q 2026-08-06
McKesson 29 % 28 % 24 % 24 % 22 % 24 %
10-Q filed 2026-08-06 Period 3M 2026-04-01 to 2026-06-30 (24%), 3M 2025-04-01 to 2025-06-30 (24%)Accession 0001297184-26-000047
McKesson 23 % 28 % 20 % 24 %
10-Q filed 2026-05-07 Period 3M 2026-01-01 to 2026-03-31 (20%), 3M 2025-01-01 to 2025-03-31 (24%)Accession 0001297184-26-000033
McKesson 24 % 25 % 25 %
10-K filed 2026-02-26 Period FY 2025-01-01 to 2025-12-31 (24%), FY 2024-01-01 to 2024-12-31 (25%), FY 2023-01-01 to 2023-12-31 (25%)Accession 0001297184-26-000009
McKesson 26 % 34 % 22 % 26 % 23 % 25 %
10-Q filed 2025-11-06 Period 3M 2025-07-01 to 2025-09-30 (22%), 3M 2024-07-01 to 2024-09-30 (26%)Accession 0001297184-25-000064
CAH Distributor
CARDINAL HEALTH INC
 16%$29.4M 3M 2026-06-30
3M ending 2024-09-30: 20%3M ending 2025-03-31: 20%3M ending 2025-06-30: 21%3M ending 2025-09-30: 21%3M ending 2026-03-31: 19%3M ending 2026-06-30: 16%−3.0pp
Active 10-Q 2026-08-06
Cardinal Health 11 % 12 % 16 % 21 % 17 % 20 %
10-Q filed 2026-08-06 Period 3M 2026-04-01 to 2026-06-30 (16%), 3M 2025-04-01 to 2025-06-30 (21%)Accession 0001297184-26-000047
Cardinal Health 14 % 12 % 19 % 20 %
10-Q filed 2026-05-07 Period 3M 2026-01-01 to 2026-03-31 (19%), 3M 2025-01-01 to 2025-03-31 (20%)Accession 0001297184-26-000033
Cardinal Health 19 % 19 % 15 %
10-K filed 2026-02-26 Period FY 2025-01-01 to 2025-12-31 (19%), FY 2024-01-01 to 2024-12-31 (19%), FY 2023-01-01 to 2023-12-31 (15%)Accession 0001297184-26-000009
Cardinal Health 16 % 16 % 21 % 20 % 20 % 20 %
10-Q filed 2025-11-06 Period 3M 2025-07-01 to 2025-09-30 (21%), 3M 2024-07-01 to 2024-09-30 (20%)Accession 0001297184-25-000064

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