William Chou - 08 Jan 2026 Form 4 Insider Report for Passage BIO, Inc. (PASG)

Reporting relationship: PRESIDENT AND CEO, Director
Issuer ticker: PASG
Reported as of: 08 Jan 2026
Net transaction value: -$75,159
SEC form: 4
Accepted by SEC: 12 Jan 2026, 16:03:52 UTC
Prior SEC filing: 18 Mar 2025
Next SEC filing: 18 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ William Chou

Key filing fact

William Chou filed Form 4 for Passage BIO, Inc. (PASG) on 12 Jan 2026.

Key facts

This page summarizes William Chou's Form 4 filing for Passage BIO, Inc. (PASG).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 12 Jan 2026, 16:03.

Change

Previous filing in this sequence was filed on 18 Mar 2025.
Current net transaction value: -$75,159.

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 0001949693 Primary reporting owner

Chou William

Relationship: PRESIDENT AND CEO, Director
Address: ONE COMMERCE SQUARE, 2005 MARKET STREET, 39TH FLOOR, PHILADELPHIA
Signature: /s/ William Chou
Signature date: 12 Jan 2026

Reported non-derivative transactions

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

PASG transaction

Common Stock

Options Exercise

Transaction value
Shares: +10,000
Change %: +1667%
Price
Shares after: 10,600
Date: 08 Jan 2026
Ownership: Direct
Footnotes: F1, F2

PASG transaction

Common Stock

Sale

Transaction value: $75,159
Shares: -4,076
Change %: -38%
Price: $18.44
Shares after: 6,524
Date: 08 Jan 2026
Ownership: Direct
Footnotes: F3, F4

Reported derivative securities

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

PASG transaction Derivative

Restricted Stock Unit

Options Exercise

Transaction value: $0
Shares: -10,000
Change %: -50%
Price: $0.000000
Shares after: 10,000
Date: 08 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,000
Exercise price
Footnotes: F1, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Restricted stock units ("RSUs") convert into common stock on a one-for-one basis.

Footnote F2

Includes 200 shares acquired on May 16, 2024, 200 shares acquired on May 15, 2025 and 200 shares acquired on November 15, 2025 under the 2020 Employee Stock Purchase Plan.

Footnote F3

The sale reported on this Form 4 represents an Issuer mandated sale by the Reporting Person to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs; it does not represent a discretionary trade by the Reporting Person. Pursuant to the Issuer's equity incentive plan, an award recipient's tax withholding obligations must be funded by a "sell to cover" transaction.

Footnote F4

The reported price in Column 4 is a weighted average price. These shares were sold as part of a block trade for multiple security holders of the Issuer in multiple transactions at prices ranging from $18.13 to $19.3061 per share, inclusive. The Reporting Person undertakes to provide to 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 sold at each separate price within the range set forth in this footnote 4 with regard to the block trade.

Footnote F5

50% of the total RSUs will vest on January 8, 2026 and the remaining 50% of the RSUs will vest on January 8, 2027, subject to the Reporting Person's provision of service to the Issuer on each vesting date.