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Who

Gayle Deflin

Director

Company insider

Files Form 4 as: Director, Amphastar Pharmaceuticals.

In numbers

Trades disclosed
17
Buys
0
Sells
3
Bought
$0
Sold
$494K
Companies
1
Companies where not an officer
1
First trade
7 Jun 2021
Last trade
1 Jun 2026
Last filed
3 Jun 2026

Companies traded

Everywhere else they filed: board seats, 10% stakes, other companies
AMPH Amphastar PharmaceuticalsDirector · Pharmaceuticals · last 1 Jun 20260 buys · 3 sells

Activity over time

1 Nov 2024 – 1 Oct 2026
101Nov 24May 25Nov 25Apr 26Oct 26

Buys above the line, sells below, each month.

Every trade

TradedCompanyWhatAmount
1 Jun 2026filed 3 Jun 2026AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—8,143 at $0.00filing
1 Jun 2026filed 3 Jun 2026AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—17,365 at $0.00filing
1 Jun 2026filed 3 Jun 2026AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—17,365 at $0.00filing
1 Jun 2026filed 3 Jun 2026AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—8,143 at $0.00filing
2 Jun 2025filed 4 Jun 2025AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—11,402 at $0.00filing
2 Jun 2025filed 4 Jun 2025AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—5,122 at $0.00filing
3 Jun 2024filed 5 Jun 2024AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—6,864 at $0.00filing
3 Jun 2024filed 5 Jun 2024AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—3,076 at $0.00filing
14 Nov 2023filed 15 Nov 2023AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Sold$231K4,163 at $55.45filing
5 Jun 2023filed 7 Jun 2023AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—7,016 at $0.00filing
5 Jun 2023filed 7 Jun 2023AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—2,716 at $0.00filing
18 May 2023filed 19 May 2023AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Sold$199K4,519 at $44.01filing
15 May 2023filed 17 May 2023AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Sold$65K1,500 at $43.15filing
10 Jun 2022filed 14 Jun 2022AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—10,984 at $0.00filing
10 Jun 2022filed 14 Jun 2022AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—4,163 at $0.00filing
7 Jun 2021filed 8 Jun 2021AMPH Amphastar Pharmaceuticalsoption or derivative · PharmaceuticalsSEC FORM 4 Code A—17,182 at $0.00filing
7 Jun 2021filed 8 Jun 2021AMPH Amphastar PharmaceuticalsPharmaceuticalsSEC FORM 4 Code A—6,019 at $0.00filing

News

Comparing Amphastar Pharmaceuticals (NASDAQ:AMPH) & Enanta Pharmaceuticals (NASDAQ:ENTA)AMPH · tickerreport.com · 13 Oct 2026

0 headlines in the last 90 days name Gayle Deflin; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.

Sectors

Health Care3

Buys in green, sells in red, by the company’s sector.

Related people

William J. PetersCFO, EVP & Treasurer · CFO, EVP & Treasurer at Amphastar Pharmaceuticals, filing Form 4 there in the last year
Rong ZhouSenior EVP, Production Center · Senior EVP, Production Center at Amphastar Pharmaceuticals, filing Form 4 there in the last year
Richard K. PrinsDirector · Director at Amphastar Pharmaceuticals, filing Form 4 there in the last year
Anthony T. PierceDirector · Director at Amphastar Pharmaceuticals, filing Form 4 there in the last year
Diane G. GerstDirector · Director at Amphastar Pharmaceuticals, filing Form 4 there in the last year