Catalyst4, Inc. - 14 Aug 2026 Form 4 Insider Report for MapLight Therapeutics, Inc. (MPLT)

Reporting relationship: 10%+ Owner
Issuer ticker: MPLT
Reported as of: 14 Aug 2026
Net transaction value: +$83,400,154
SEC form: 4
Accepted by SEC: 18 Aug 2026, 18:55:39 UTC
Prior SEC filing: 30 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert Brown

Key filing fact

Catalyst4, Inc. filed Form 4 for MapLight Therapeutics, Inc. (MPLT) on 18 Aug 2026.

Key facts

This page summarizes Catalyst4, Inc.'s Form 4 filing for MapLight Therapeutics, Inc. (MPLT).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 18 Aug 2026, 18:55.

Change

Previous filing in this sequence was filed on 30 Jul 2026.
Current net transaction value: +$83,400,154.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001900201 Primary reporting owner

Catalyst4, Inc.

Relationship: 10%+ Owner
Address: 555 BRYANT STREET #376, PALO ALTO
Signature: /s/ Robert Brown
Signature date: 18 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MPLT transaction

Voting Common Stock

Purchase

Transaction value: $50,072,000
Shares: +4,400,000
Change %: +21%
Price: $11.38
Shares after: 25,306,689
Date: 14 Aug 2026
Ownership: See footnote
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MPLT transaction Derivative

Warrants (right to buy)

Purchase

Transaction value: $33,328,154
Shares: +2,928,686
Change %
Price: $11.38
Shares after: 2,928,686
Date: 14 Aug 2026
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 2,928,686
Exercise price: $0.000100
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

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.

Footnote 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%.

Footnote F3

The warrants will not expire until exercised in full.