Marcio Souza

CIK: 0001707657

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)4 (36.4%)

Compensation grants

Other (G, F, J, C, D, …)7 (63.6%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

PRAX

Praxis Precision Medicines, Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (11 total)

PRAX
Praxis Precision Medicines, Inc.
Jul 8, 2026
Gift(G)
Direct
20.5K shares-
PRAX
Praxis Precision Medicines, Inc.
Jul 8, 2026
Gift(G)
Indirect
2.6K shares-
PRAX
Praxis Precision Medicines, Inc.
May 14, 2026
Award(A)
Direct
126 shares at avg. $167.94$21K
PRAX
Praxis Precision Medicines, Inc.
Jan 10, 2026
Tax Payment(F)
Direct
4.3K shares at avg. $288.45$1.2M
PRAX
Praxis Precision Medicines, Inc.
Jan 8, 2026
Award(A)
Direct
27.6K shares-
PRAX
Praxis Precision Medicines, Inc.
Jan 7, 2026
Tax Payment(F)
Direct
405 shares at avg. $292.63$119K
PRAX
Praxis Precision Medicines, Inc.
Dec 30, 2025
Gift(G)
Indirect
400 shares-
PRAX
Praxis Precision Medicines, Inc.
May 14, 2025
Award(A)
Direct
348 shares at avg. $31.54$11K
PRAX
Praxis Precision Medicines, Inc.
Feb 12, 2025
Tax Payment(F)
Direct
401 shares at avg. $85.40$34K
PRAX
Praxis Precision Medicines, Inc.
Jan 10, 2025
Award(A)
Direct
37.5K shares-
PRAX
Praxis Precision Medicines, Inc.
Jan 7, 2025
Tax Payment(F)
Direct
434 shares at avg. $77.52$34K

		Type	Shares	Price		Ownership
Jul 8, 2026	PRAX Praxis Precision Medicines, Inc.	Gift(G)	20,521	-	$0	Direct
Jul 8, 2026	PRAX Praxis Precision Medicines, Inc.	Gift(G)	2,600	-	$0	Indirect
May 14, 2026	PRAX Praxis Precision Medicines, Inc.	Award(A)	126	$167.94	$21,161	Direct
Jan 10, 2026	PRAX Praxis Precision Medicines, Inc.	Tax Payment(F)	4,252	$288.45	$1,226,489	Direct
Jan 8, 2026	PRAX Praxis Precision Medicines, Inc.	Award(A)	27,640	-	$0	Direct
Jan 7, 2026	PRAX Praxis Precision Medicines, Inc.	Tax Payment(F)	405	$292.63	$118,515	Direct
Dec 30, 2025	PRAX Praxis Precision Medicines, Inc.	Gift(G)	400	-	-	Indirect
May 14, 2025	PRAX Praxis Precision Medicines, Inc.	Award(A)	348	$31.54	$10,974	Direct
Feb 12, 2025	PRAX Praxis Precision Medicines, Inc.	Tax Payment(F)	401	$85.40	$34,245	Direct
Jan 10, 2025	PRAX Praxis Precision Medicines, Inc.	Award(A)	37,500	-	$0	Direct
Jan 7, 2025	PRAX Praxis Precision Medicines, Inc.	Tax Payment(F)	434	$77.52	$33,644	Direct

1-11 of 11 transactions

About Souza Marcio

Souza Marcio (SEC CIK 0001707657) files insider reports with the SEC as Chief Executive Officer of Praxis Precision Medicines, Inc. (PRAX).

Signal8 holds 9 ownership filings by Souza Marcio, all Form 4s, filed between Jan 8, 2025 and Jul 8, 2026. Those filings report 11 transactions, from Jan 7, 2025 to Jul 8, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Souza Marcio's filings is in BOSTON, MA.

Recent filings by Souza Marcio

Jul 8, 2026: Gifts of PRAX shares (2 lines, Form 4, code G).
May 14, 2026: Grant or award of PRAX shares (Form 4, code A).
Jan 10, 2026: Tax withholding of PRAX shares (Form 4, code F).
Jan 8, 2026: Grant or award of PRAX shares (Form 4, code A).
Jan 7, 2026: Tax withholding of PRAX shares (Form 4, code F).

Other insiders filing for Praxis Precision Medicines, Inc. (PRAX)

How to read Form 4 transaction codes