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Upstream Bio (UPB) Stock Chart & Stock Price History

Upstream Bio logo
$5.04 0.00 (0.00%)
Closing price 10/2/2026 04:00 PM Eastern
Extended Trading
$5.04 +0.00 (+0.10%)
As of 10/2/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.

Upstream Bio Stock Price Performance

The Upstream Bio (UPB) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 72.95%, with a year-to-date return of -81.44%. In the past month, the stock has decreased 16.14%, reflecting recent market activity.

As of the latest close, Upstream Bio traded at $5.04 with a market cap of $276.04 million and volume of 956,519 shares.

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5 Day
Performance
-2.89%
1 Month
Performance
-16.14%
3 Month
Performance
-32.89%
Year-To-Date
Performance
-81.44%
1 Year
Performance
-72.95%

UPB Stock Chart for Sunday, October, 4, 2026

Upstream Bio Stock Price History

DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
10/02/2026$5.04$5.04$5.21$4.86956,519 shs$276.04 million
10/01/2026$5.27$5.04
-4.36%
$5.35$4.98832,377 shs$276.04 million
09/30/2026$5.19$5.27
+1.54%
$5.46$5.15851,222 shs$288.64 million
09/29/2026$5.30$5.19
-2.08%
$5.31$4.99784,211 shs$284.26 million
09/28/2026$5.36$5.30
-1.12%
$5.39$5.12615,401 shs$290.28 million
09/25/2026$5.17$5.36
+3.68%
$5.39$5.07429,111 shs$293.57 million
09/24/2026$5.19$5.17
-0.39%
$5.20$5.05566,582 shs$283.17 million
09/23/2026$5.49$5.19
-5.46%
$5.49$4.99552,994 shs$284.26 million
09/22/2026$5.36$5.49
+2.43%
$5.56$5.38360,398 shs$300.69 million
09/21/2026$5.34$5.36
+0.37%
$5.44$5.27364,034 shs$293.57 million
09/18/2026$5.31$5.34
+0.56%
$5.41$5.211.00 million shs$292.48 million
09/17/2026$5.33$5.31
-0.38%
$5.48$5.24533,871 shs$290.83 million
09/16/2026$5.48$5.33
-2.74%
$5.54$5.27497,239 shs$291.92 million
09/15/2026$5.81$5.48
-5.68%
$5.81$5.46421,258 shs$300.15 million
09/14/2026$5.73$5.81
+1.40%
$5.87$5.70491,023 shs$318.21 million
09/11/2026$5.75$5.73
-0.35%
$5.84$5.65501,307 shs$313.83 million
09/10/2026$5.96$5.75
-3.52%
$5.86$5.67562,401 shs$314.93 million
09/09/2026$6.19$5.96
-3.72%
$6.20$5.77726,235 shs$326.44 million
09/08/2026$6.01$6.19
+3.00%
$6.21$5.77949,641 shs$339.03 million
09/07/2026$6.01$6.01$6.23$5.97642,852 shs$329.17 million
09/04/2026$6.08$6.01
-1.15%
$6.23$5.97642,852 shs$329.17 million
09/03/2026$6.48$6.08
-6.17%
$6.49$5.771.35 million shs$333.01 million

This page (NASDAQ:UPB) was last updated on 10/2/2026 by MarketBeat.com Staff.
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