Form 4 for MPLT MapLight Therapeutics, Inc.

Accepted 2026-07-30 18:39:21 ET · period of report 2026-07-28 · accession 0001900201-26-000003 · 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
MI	2026-07-30 18:39	2026-07-28+	MPLT	Catalyst4, Inc.	10%	P - Purchase	$12.66	+1.21M	20.91M	+6%	+$15.31M

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Voting Common Stock	2026-07-28	P	A	141,088	$10.74	19,838,552	I See footnote	—	—	(F1) The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $10.295 to $11.28, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1) and (3) to this Form 4. (F2) 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	Common	Voting Common Stock	2026-07-28	P	A	65,137	$11.69	19,903,689	I See footnote	—	—	(F3) The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $11.31 to $12.00, inclusive. (F2) 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.
3	Common	Voting Common Stock	2026-07-29	P	A	3,000	$12.63	19,906,689	I See footnote	—	—	(F2) 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.
4	Common	Voting Common Stock	2026-07-30	P	A	1,000,000	$13.00	20,906,689	I See footnote	—	—	(F2) 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.