Rong Zhou sold $256K of Amphastar Pharmaceuticals (AMPH)

Executed Dec 17 2025, disclosed Dec 18 2025, 1 day later.

Value, as filed

$256K

9,787 sh × $26.20

Executed

Dec 17 2025

the trade date, as filed

Disclosed

Dec 18 2025

1 day after the trade

Return, 21 sessionsiFrom the disclosed entry session; derived

–

purchases only

Returns are measured on stock purchases only.

The filer

RZ Rong Zhou SENIOR EVP, PRODUCTION CENTER profile →

Rong Zhou (SENIOR EVP, PRODUCTION CENTER) filed 2 Form 4 reports in the trailing twelve months (0 purchases, 2 sales), most often in Amphastar Pharmaceuticals, Inc. (AMPH). The largest single filing was $256K of AMPH (9,787 sh × $26.20, as filed), executed Dec 17 2025.

The name

AMPH Amphastar Pharmaceuticals, Inc. AMPH · Healthcare · 13 filings in 24 months ticker →

Healthcare · Amphastar Pharmaceuticals, Inc., a bio-pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectabl…

More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→

Other filings by Rong Zhou in AMPH

AMPHSALE Amphastar Pharmaceuticals, Inc. $239K
10,000 sh × $23.94
Exec Sep 16
Filed Sep 17 · 6:19 PM ET AMPHSALE Amphastar Pharmaceuticals, Inc. $673K
15,000 sh across 2 lots
Exec Dec 12 2024
Filed Dec 16 2024 · 5:30 PM ET AMPHSALE Amphastar Pharmaceuticals, Inc. $337K
6,893 sh × $48.88
Exec Nov 12 2024
Filed Nov 13 2024 · 5:30 PM ET AMPHSALE Amphastar Pharmaceuticals, Inc. $145K
3,000 sh × $48.26
Exec Sep 13 2024
Filed Sep 17 2024 · 5:30 PM ET