Form 4 for RBRK Rubrik, Inc.

Accepted 2026-01-16 00:00:00 ET · period of report 2026-01-14 · accession 0001207433-26-000004 · 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	2026-01-16	2026-01-14	RBRK	THOMPSON JOHN WENDELL	Dir	C - Cnv Deriv	$0.00	+27.5K	28.5K	+2,756%	$0
D	2026-01-16	2026-01-15	RBRK	THOMPSON JOHN WENDELL	Dir	A - Grant	$0.00	-953	3,655	-21%	$0
DI	2026-01-16	2026-01-14	RBRK	THOMPSON JOHN WENDELL	Dir	C - Cnv Deriv	—	-27.5K	815.3K	-3%	—

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	2026-01-14	C	A	27,500	$0.00	28,498	I By John and Sandra Thompson Trust	—	—	(F1) The shares are held of record by John and Sandra Thompson Trust, for which the Reporting Person serves as a co-trustee and shares voting and dispositive power with his spouse.
2	Common	Class A Common Stock	2026-01-15	A	D	953	$0.00	3,655	D	—	—
3	Derivative	Class B Common Stock	2026-01-14	C	D	27,500	—	815,338	I By John and Sandra Thompson Trust	— · — to —	27,500 Class A Common Stock	(F3) Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock. (F1) The shares are held of record by John and Sandra Thompson Trust, for which the Reporting Person serves as a co-trustee and shares voting and dispositive power with his spouse.