Form 4 for MPLT MapLight Therapeutics, Inc.

Accepted 2026-08-18 18:55:39 ET · period of report 2026-08-14 · accession 0001900201-26-000005 · 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	2026-08-18 18:55	2026-08-14	MPLT	Catalyst4, Inc.	10%	P - Purchase	$11.38	+4.40M	25.31M	+21%	+$50.07M
DI	2026-08-18 18:55	2026-08-14	MPLT	Catalyst4, Inc.	10%	P - Purchase	$11.38	+2.93M	2.93M	New	+$33.33M

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	Voting Common Stock	2026-08-14	P	A	4,400,000	$11.38	25,306,689	I See footnote	—	—	(F1) The shares are held of record by Catalyst4, Inc. ("Catalyst4"). As the members of the board of directors of Catalyst4, Robert Brown, Ekemini Riley and Mark Vorsatz share voting and dispositive power with respect to the shares held by Catalyst4. Each of Mr. Brown, Ms. Riley and Mr. Vorsatz disclaims beneficial ownership of the shares reported herein.
2	Derivative	Warrants (right to buy)	2026-08-14	P	A	2,928,686	$11.38	2,928,686	I See footnote	$0.0001 · — to —	2,928,686 Voting Common Stock	(F2) The warrant is immediately exercisable, however, the warrant may not be exercised if the aggregate number of shares of voting common stock beneficially owned by the reporting person immediately following such exercise would exceed 49.99%. (F3) The warrants will not expire until exercised in full. (F1) The shares are held of record by Catalyst4, Inc. ("Catalyst4"). As the members of the board of directors of Catalyst4, Robert Brown, Ekemini Riley and Mark Vorsatz share voting and dispositive power with respect to the shares held by Catalyst4. Each of Mr. Brown, Ms. Riley and Mr. Vorsatz disclaims beneficial ownership of the shares reported herein.