Catalyst4, Inc. - 28 Jul 2026 Form 4 Insider Report for MapLight Therapeutics, Inc. (MPLT)

Reporting relationship: 10%+ Owner
Issuer ticker: MPLT
Reported as of: 28 Jul 2026
Net transaction value: +$15,314,794
SEC form: 4
Accepted by SEC: 30 Jul 2026, 18:39:21 UTC
Prior SEC filing: 29 Oct 2025
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 30 Jul 2026.

Key facts

This page summarizes Catalyst4, Inc.'s Form 4 filing for MapLight Therapeutics, Inc. (MPLT).
4 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 30 Jul 2026, 18:39.

Change

Previous filing in this sequence was filed on 29 Oct 2025.
Current net transaction value: +$15,314,794.

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: 30 Jul 2026

Reported non-derivative transactions

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

MPLT transaction

Voting Common Stock

Purchase

Transaction value: $1,515,511
Shares: +141,088
Change %: +0.72%
Price: $10.74
Shares after: 19,838,552
Date: 28 Jul 2026
Ownership: See footnote
Footnotes: F1, F2

MPLT transaction

Voting Common Stock

Purchase

Transaction value: $761,393
Shares: +65,137
Change %: +0.33%
Price: $11.69
Shares after: 19,903,689
Date: 28 Jul 2026
Ownership: See footnote
Footnotes: F2, F3

MPLT transaction

Voting Common Stock

Purchase

Transaction value: $37,890
Shares: +3,000
Change %: +0.02%
Price: $12.63
Shares after: 19,906,689
Date: 29 Jul 2026
Ownership: See footnote
Footnotes: F2

MPLT transaction

Voting Common Stock

Purchase

Transaction value: $13,000,000
Shares: +1,000,000
Change %: +5%
Price: $13.00
Shares after: 20,906,689
Date: 30 Jul 2026
Ownership: See footnote
Footnotes: F2

^* 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 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.

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.

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.