Form 4 for AEIS ADVANCED ENERGY INDUSTRIES INC

Accepted 2026-05-05 20:37:59 ET · period of report 2025-05-02 · accession 0001770310-26-000006 · 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 20:37	2026-05-02	AEIS	DelSanto Anne	Dir	M - OptEx	—	+2,313	8,487	+37%	—
D	2026-05-05 20:37	2026-05-02	AEIS	DelSanto Anne	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	—	8,487	I By The Delsanto 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 covert to common stock on a one-for-one basis. (F2) Of this total amount of 8,487 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 Delsanto Family Trust; and (B) 6,174 shares are held indirectly by The Delsanto Family Trust, for which the reporting person serves as a trustee.
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 covert to common stock on a one-for-one basis. (F3) Restricted stock units are not exercisable and do not have an expiration date. (F3) Restricted stock units are not exercisable and do not have an expiration date.