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UPB
Upstream Bio, Inc. Common Stock
stockNASDAQ

Market OpenOct 5, 2026 10:50:19 AM EDT

4.74USD-6.139%(-0.31)156,025

4.7300Bid4.7500Ask0.0200Spread

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259.61M

Previous Close

$5.05

Beta

1.13

52-Week High

$33.68 2026-01-14

52-Week Low

$4.86 2026-10-02

SMA 50

$6.26

SMA 200

$11.83

Avg. Vol 10D

631,309

Avg. Vol 30D

620,754

Avg. Vol 90D

614,279

Relative Vol

0.24

54.77M

20.08M

36.67%

4,490,724

Short Interest %

22.36%

6.84

On/Off Exchange

59%/41%

43.84%

Short Vol % (off-exch)

33.35%

0.5500%

850,000

704

2,516

4,012

Nov 4, 2026 (30d)

Sep 24, 2026

03:40 PM EDTKBRA Assigns Preliminary Ratings to OBX 2026-INV6 Trust ·

Business Wire

Sep 21, 2026

03:14 PM EDTFannie Mae Announces Winners of its Latest Non-Performing Loan Sale ·

PR Newswire

Sep 8, 2026

03:30 AM EDTUpstream Bio Presents Results from the Phase 2 VALIANT Trial of Verekitug for the Treatment of Severe Asthma in Oral Presentation at ERS Congress 2026 ·

GlobeNewswire Inc.

UPB Performance

Period	Price	Date	Change	Beta
1W	5.30	2026-09-28	-10.57%	-0.113
1M	6.01	2026-09-04	-21.13%	1.428
3M	7.40	2026-07-06	-35.95%	1.410
6M	9.72	2026-04-06	-51.23%	0.874
1Y	18.97	2025-10-06	-75.01%	1.125
2Y	22.00	2024-10-11	-78.45%	—

UPB Stock Summary

Upstream Bio, Inc. Common Stock (NASDAQ:UPB) stock price today is $4.74, and today's volume is 150,265. UPB is down 5.952% today. The 30 day average volume is 620,754. UPB market cap is $259.61M with 54.77M shares outstanding.