$AMPH 4 SEC Filings

Filed On	Filing
23 Sep 2026	Form 4: Peters William J, Director Sold 4,139 shares ($103K)
17 Sep 2026	Form 4: Zhou Rong, SENIOR EVP, PRODUCTION CENTER Received 10,000 shares by exercise or conversion ($134K) · Sold 10,000 shares ($239K)
03 Sep 2026	Form 4: Zhou Rong, SENIOR EVP, PRODUCTION CENTER Sold 3,187 shares ($75.3K)
12 Aug 2026	Form 4: Prins Richard K, Director Sold 7,973 shares ($162K)
11 Aug 2026	Form 4: Peters William J, Director Received 5,053 shares by exercise or conversion ($100K) · Sold 8,180 shares ($184K)
13 Jul 2026	Form 4: Pierce Anthony T, Director Received 7,886 shares as a grant or award · Granted 16,646 Stock Option (right to buy)
03 Jun 2026	Form 4: Prins Richard K, Director Gave 1,500 shares as a gift · Received 8,143 shares as a grant or award · Granted 17,365 Stock Option (right to buy)
03 Jun 2026	Form 4: Lee Howard, Director Received 8,143 shares as a grant or award · Granted 17,365 Stock Option (right to buy) · Gave up 769 shares to cover exercise price or tax ($14.2K)
03 Jun 2026	Form 4: Gerst Diane G., Director Received 8,143 shares as a grant or award · Granted 17,365 Stock Option (right to buy)
03 Jun 2026	Form 4: Zasloff Michael A, Director Received 8,143 shares as a grant or award · Granted 17,365 Common Stock
03 Jun 2026	Form 4: Deflin Gayle, Director Received 8,143 shares as a grant or award · Granted 17,365 Stock Option (right to buy)
03 Jun 2026	Form 4: Gaugh David Russell, Director Received 8,143 shares as a grant or award · Granted 17,365 Stock Option (right to buy)
17 Mar 2026	Form 4: Liawatidewi Yakob, Director Gave up 1,033 shares to cover exercise price or tax ($18.8K)
17 Mar 2026	Form 4: Zhou Rong, SENIOR EVP, PRODUCTION CENTER Gave up 1,225 shares to cover exercise price or tax ($22.3K)
17 Mar 2026	Form 4: Peters William J, Director Gave up 1,973 shares to cover exercise price or tax ($35.9K)
17 Mar 2026	Form 4: Zhang Jack Y., Director and 1 other Gave up 12,692 shares to cover exercise price or tax ($231K)
11 Mar 2026	Form 4: Peters William J, Director Received 58,693 shares as a grant or award · Granted 121,071 Employee Stock Option (right to buy) · Gave up 3,297 shares to cover exercise price or tax ($62.3K)
11 Mar 2026	Form 4: Zhou Rong, SENIOR EVP, PRODUCTION CENTER Received 39,432 shares as a grant or award · Granted 81,341 Employee Stock Option (right to buy) · Gave up 2,215 shares to cover exercise price or tax ($41.9K)
11 Mar 2026	Form 4: Liawatidewi Yakob, Director Received 35,450 shares as a grant or award · Granted 73,126 Employee Stock Option (right to buy) · Gave up 1,870 shares to cover exercise price or tax ($35.4K)
11 Mar 2026	Form 4: Zhang Jack Y., Director and 1 other Received 252,966 shares as a grant or award · Granted 521,810 Employee Stock Option (right to buy) · Gave up 19,180 shares to cover exercise price or tax ($363K)

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