InsiderTrades

Form 4 for MPLT MapLight Therapeutics, Inc.

Accepted 2025-10-29 00:00:00 ET · period of report 2025-10-28 · accession 0001900201-25-000008 · 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 2025-10-29 2025-10-28 MPLT Catalyst4, Inc. 10% P - Purchase $17.00 +5.44M 19.70M +38% +$92.50M
DI 2025-10-29 2025-10-28 MPLT Catalyst4, Inc. 10% C - Cnv Deriv — +14.26M 14.26M New —
DMI 2025-10-29 2025-10-28 MPLT Catalyst4, Inc. 10% C - Cnv Deriv — -14.26M 0 -100% —

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Voting Common Stock 2025-10-28 P A 5,441,176 $17.00 19,697,464 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.
2 Common Voting Common Stock 2025-10-28 C A 14,256,288 — 14,256,288 I See 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. (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 Derivative Series A-1 Preferred Stock 2025-10-28 C D 444,846 — 0 I See footnote — · — to — 444,846 Voting Common Stock (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. (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 Derivative Series A Preferred Stock 2025-10-28 C D 148,809 — 0 I See footnote — · — to — 148,809 Voting Common Stock (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. (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.
5 Derivative Series B-1 Preferred Stock 2025-10-28 C D 275,148 — 0 I See footnote — · — to — 275,148 Voting Common Stock (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. (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.
6 Derivative Series C Preferred Stock 2025-10-28 C D 5,444,807 — 0 I See footnote — · — to — 5,444,807 Voting Common Stock (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. (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.
7 Derivative Series D Preferred Stock 2025-10-28 C D 6,678,910 — 0 I See footnote — · — to — 6,678,910 Voting Common Stock (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. (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.
8 Derivative Series B Preferred Stock 2025-10-28 C D 1,263,768 — 0 I See footnote — · — to — 1,263,768 Voting Common Stock (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. (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.