GRAY MICHAEL

PrivateCIK: 1271411
Location

LEXINGTON, MA

GRAY MICHAEL (CFO and COO) sold 2.9% of their position (853.00 shares) of UPSTREAM BIO, INC. on the open market

Open‑market sale worth $5.2K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderGRAY MICHAELCIK 1271411
IssuerUPSTREAM BIO, INC.CIK 2022626
Officer· CFO and COO
Since Oct 2024
-853.00
Net shares
Net seller
$5.2K
Total sold
1
Open market trades
0B · 1S
1
Total transactions
853.00 disposed
Non-Derivative Transactions1

Common Stock

Direct
S · Sale

Shares

853.00

Price / share

$6.10

Trade value

$5.20K

% of position

2.9%
6/16/2026
29.65K28.80K
Total

Net shares

853.00

Net value

-$5.20K

Derivative Transactions0
No derivative transactions reported
GRAY MICHAEL — Insider Transaction (Form 4) Filed Jun 17, 2026 | Finecho