Form 4 for AEIS ADVANCED ENERGY INDUSTRIES INC

Accepted 2026-05-05 20:43:30 ET · period of report 2026-05-02 · accession 0001175993-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
DI	2026-05-05 20:43	2026-05-02	AEIS	BALL FREDERICK	Dir	M - OptEx	—	+2,313	3,820	+153%	—
D	2026-05-05 20:43	2026-05-02	AEIS	BALL FREDERICK	Dir	M - OptEx	$0.00	-2,313	0	-100%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-05-02	M	A	2,313	—	3,820	I By 1998 Ball Family Trust	—	—	(F1) On May 2, 2025, the reporting person was granted 2,313 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units convert to common stock on a one-for-one basis. (F2) Of this total amount of 3,820 shares: (A) 2,313 shares were issued and are held directly by the reporting person, and the reporting person has instructions in place to transfer the 2,313 shares to the 1998 Ball Family Trust; and (B) 1,507 shares are held indirectly by the 1998 Ball Family Trust, which includes a total of 189 shares acquired through the Dividend Reinvestment Plan.
2	Derivative	Restricted Stock Units	2026-05-02	M	D	2,313	$0.00	0	D	— · — to —	2,313 Common Stock	(F1) On May 2, 2025, the reporting person was granted 2,313 restricted stock units, which vested on the one-year anniversary of the grant date. Restricted stock units convert to common stock on a one-for-one basis. (F4) Restricted stock units are not exercisable and do not have an expiration date. (F4) Restricted stock units are not exercisable and do not have an expiration date.