Chimovits Erez bought UPB

June 9, 2026 · Form 4 insider transaction

Chimovits Erez bought 17,096 shares of Upstream Bio, Inc. at $0.00 per share, a transaction worth N/A. The trade was recorded as grant or award and disclosed on an SEC Form 4, filed 2 days after the transaction.

Direction
Acquired (buy-side)
Shares
17,096
Price
$0.00
Total value
N/A
RoleDirector
SecurityStock Option (Right to Buy)
Transaction codeA: Grant or award
Transaction dateJune 9, 2026
Filing dateJune 11, 2026
Shares owned after17,096
OwnershipDirect
10b5-1 planNo
AmendedNo

Footnotes

The shares underlying this option shall vest in full upon the earlier of (i) June 9, 2027 and (ii) the date of the next Annual Meeting of Stockholders of the Issuer, subject to the Reporting Person's continued service on such vesting date.; Pursuant to an agreement with OrbiMed Advisors LLC, OrbiMed Capital GP VIII LLC, OrbiMed Israel GP II, L.P., and OrbiMed Advisors Israel II Limited, the Reporting Person is obligated to transfer any securities issued under any such stock options or other awards, or the economic benefit thereof, to OrbiMed Advisors LLC, OrbiMed Capital GP VIII LLC, OrbiMed Israel GP II, L.P., and OrbiMed Advisors Israel II Limited, which will in turn ensure that such securities or economic benefits are provided to OrbiMed Private Investments VIII, LP and OrbiMed Israel Partners II, L.P.

View the original Form 4 on SEC EDGAR