Form 4 for DFTX Definium Therapeutics, Inc.

Accepted 2026-06-15 16:30:21 ET · period of report 2026-06-11 · accession 0001193125-26-271163 · 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
D	2026-06-15 16:30	2026-06-11	DFTX	GRYSKA DAVID W	Dir	A - Grant	$0.00	+4,666	19.9K	+31%	$0
D	2026-06-15 16:30	2026-06-11	DFTX	GRYSKA DAVID W	Dir	A - Grant	$0.00	+19.2K	19.2K	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	Common Shares	2026-06-11	A	A	4,666	$0.00	19,900	D	—	—	(F1) These shares represent restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one common share of the Issuer. The RSUs vest as to 1/12th of the underlying shares on each monthly anniversary of the date of the grant, provided, that if the Issuer's annual meeting immediately following the date of grant takes place prior to the first anniversary of the date of grant, any unvested RSUs will vest immediately prior to the Issuer's annual meeting following the date of grant, subject the Reporting Person's continued service through the applicable vesting date.
2	Derivative	Stock Option (Right to Buy)	2026-06-11	A	A	19,188	$0.00	19,188	D	$24.11 · — to 2036-06-10	19,188 Common Shares	(F2) The Stock Option vests and becomes exercisable as to 1/12th of the underlying shares on each monthly anniversary of the date of the grant, provided, that if the Issuer's annual meeting immediately following the date of grant takes place prior to the first anniversary of the date of grant, the Stock Option will vest and become exercisable immediately prior to the Issuer's annual meeting following the date of grant, subject to the Reporting Person's continued service through the applicable vesting date.