Upstream Bio, Inc. — Director's Dealing 2024

Oct 11, 2024

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Upstream Bio, Inc. (UPB)
CIK: 0002022626
Period of Report: 2024-10-10

Reporting Person: Renaud Ronald C JR (N/A)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$3.45	2032-01-01	Common Stock (164502)		Direct
Stock Option (Right to Buy)	$3.45	2032-01-01	Common Stock (107312)		Direct
Stock Option (Right to Buy)	$4.27	2033-03-01	Common Stock (9563)		Direct
Stock Option (Right to Buy)	$4.87	2033-08-13	Common Stock (31470)		Direct
Stock Option (Right to Buy)	$6.59	2034-05-04	Common Stock (113554)		Direct

Footnotes

F1: 25% of the shares underlying this option vested on November 17, 2022, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.

F2: 25% of the shares underlying this option vested on February 14, 2024, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.

F3: 25% of the shares underlying this option vested on March 2, 2024, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.

F4: 25% of the shares underlying this option vested on August 10, 2024, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.

F5: 25% of the shares underlying this option shall vest on May 5, 2025, with the remainder vesting in thirty-six equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.