Catalyst4, Inc. - 28 Oct 2025 Form 4 Insider Report for MapLight Therapeutics, Inc. (MPLT)

Reporting relationship: 10%+ Owner
Issuer ticker: MPLT
Reported as of: 28 Oct 2025
Net transaction value: +$92,499,992
SEC form: 4
Accepted by SEC: 29 Oct 2025, 16:16:55 UTC
Prior SEC filing: 27 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 29 Oct 2025.

Key facts

This page summarizes Catalyst4, Inc.'s Form 4 filing for MapLight Therapeutics, Inc. (MPLT).
8 reported transactions and 6 derivative rows are listed below.
Accepted by SEC: 29 Oct 2025, 16:16.

Change

Previous filing in this sequence was filed on 27 Oct 2025.
Current net transaction value: +$92,499,992.

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: 29 Oct 2025

Reported non-derivative transactions

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

MLPT transaction

Voting Common Stock

Conversion of derivative security

Transaction value
Shares: +14,256,288
Change %
Price
Shares after: 14,256,288
Date: 28 Oct 2025
Ownership: See footnote
Footnotes: F1, F2

MLPT transaction

Voting Common Stock

Purchase

Transaction value: $92,499,992
Shares: +5,441,176
Change %: +38%
Price: $17.00
Shares after: 19,697,464
Date: 28 Oct 2025
Ownership: See footnote
Footnotes: F2

Reported derivative securities

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

MLPT transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares: -148,809
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 148,809
Exercise price
Footnotes: F2, F3

MLPT transaction Derivative

Series A-1 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -444,846
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 444,846
Exercise price
Footnotes: F2, F4

MLPT transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares: -1,263,768
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 1,263,768
Exercise price
Footnotes: F2, F5

MLPT transaction Derivative

Series B-1 Preferred Stock

Conversion of derivative security

Transaction value
Shares: -275,148
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 275,148
Exercise price
Footnotes: F2, F6

MLPT transaction Derivative

Series C Preferred Stock

Conversion of derivative security

Transaction value
Shares: -5,444,807
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 5,444,807
Exercise price
Footnotes: F2, F7

MLPT transaction Derivative

Series D Preferred Stock

Conversion of derivative security

Transaction value
Shares: -6,678,910
Change %: -100%
Price
Shares after: 0
Date: 28 Oct 2025
Ownership: See footnote
Underlying class: Voting Common Stock
Underlying amount: 6,678,910
Exercise price
Footnotes: F2, F8

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 8 footnotes

Footnote F1

The Series A, A-1, B, B-1, C and D Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.

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 Series A Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.

Footnote F4

The Series A-1 Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.

Footnote F5

The Series B Preferred Stock is convertible on a 1-for-16.8 basis into voting common stock at any time at the holder's election and will convert automatically upon the closing of the Issuer's initial public offering and has no expiration date.

Footnote F6

The Series B-1 Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.

Footnote F7

The Series C Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.

Footnote F8

The Series D Preferred Stock automatically converted into voting common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-16.8 basis, and had no expiration date.