Form 4 for STDN Standard Nuclear, Inc.

Accepted 2026-07-17 20:58:58 ET · period of report 2026-07-15 · accession 0001628280-26-048734 · 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
M	2026-07-17 20:58	2026-07-15	STDN	GHASEMIAN SHAHRAM	CLO	A - Grant	$0.00	+600.0K	600.0K	New	$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	Class A common stock	2026-07-15	A	A	40,000	$0.00	40,000	D	—	—	(F1) Represents shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). The RSUs vested in full upon pricing of the Issuer's initial public offering.
2	Common	Class A common stock	2026-07-15	A	A	360,000	$0.00	400,000	D	—	—	(F2) Represents shares of Class A Common Stock underlying an award of RSUs. The RSUs will vest over four years with 25% vesting on May 4, 2027 and the remainder vesting in equal quarterly installments thereafter, subject to the Reporting Persons continued service through each vesting date.
3	Common	Class A common stock	2026-07-15	A	A	100,000	$0.00	500,000	D	—	—	(F3) Represents shares of Class A Common Stock underlying an award of RSUs. The RSUs will vest over 18 months in quarterly installments of 1/6th, subject to the Reporting Person's continued service through each vesting date.
4	Common	Class A common stock	2026-07-15	A	A	100,000	$0.00	600,000	D	—	—	(F4) Represents shares of Class A Common Stock underlying an award of RSUs. The RSUs will vest over four years with 25% vesting on June 1, 2027 and the remainder vesting in equal monthly installments thereafter, subject to the Reporting Person's continued service through each vesting date.