What is UPB's dilution risk score?

UPB has a latest available DilutionScore record of 38/100, categorized as medium dilution risk by the DilutionWatch scoring model. DilutionWatch displays SEC filing and dilution indicators for UPB, including shelf registrations, ATM offerings, warrant exercises, PIPE deals, and reverse split signals when detected in source data.

What SEC filings does DilutionWatch track for UPB?

DilutionWatch tracks 25 SEC filing types for UPB including S-3 shelf registrations, 424B prospectuses (ATM offerings), S-1 registration statements, 8-K material events, warrant exercise notices, convertible note agreements, and Form 4 insider transactions. Alerts are delivered via email within minutes of a filing appearing on EDGAR.

How does stock dilution affect UPB shareholders?

Stock dilution occurs when a company issues new shares, reducing the ownership percentage of existing shareholders. For UPB, common dilution events include at-the-market (ATM) stock offerings, shelf registration drawdowns, warrant exercises, and convertible note conversions. Each event increases the share count and can pressure the stock price lower.

Is DilutionWatch free for UPB tracking?

DilutionWatch provides a free tier that shows DilutionScores and basic filing history for UPB. Premium plans ($19.95/month Basic, $39.95/month Premium) unlock real-time email alerts, the full Pulse™ feed, advanced dilution forecasts, and access to all 10,000+ tracked tickers.

UPB Dilution Risk Score: 38/100 (MEDIUM)

Score Breakdown

📋 Offering Ability

40

💰 Cash Runway

25

📊 Float Risk

40

⚠️ Warrant Exposure

40

🔄 Convertible Debt

60

Dilution Forecast

🌥️

Advisory

Moderate dilution signals present

model est. 20%

🔁 Convertible Conversion model 40%

• Significant convertible debt: 22% potential dilution

• Elevated convertible risk (60/100)

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Market Data

Market Cap$454.95M

Shares Outstanding54.77M

Float34.97M

Cash$261.31M

Debt$1.11M

Short InterestN/A

Source-Backed Evidence Depth

This public preview uses stored DilutionWatch fields and linked SEC/market records only. Missing values are not estimated.

Field	Current Value	Basis
DilutionScore	38/100	DilutionWatch score record
Shares Outstanding	54.77M	Verified float table or market cache
Public Float	34.97M	Verified float table or market cache
Market Cap	$454.95M	Market data cache
Cash Runway	23.5 months	DilutionWatch score inputs
Shelf Capacity	None in current score inputs	SEC-derived dilution fields
ATM Capacity	None in current score inputs	SEC-derived dilution fields
Outstanding Warrants	None in current score inputs	SEC-derived dilution fields

Recent source-backed SEC insight records available on this page: 1.

Recent SEC source mix: XBRL 1.

The page does not infer future share issuance, financing probability, cash needs, management intent, or price impact when source fields are absent.

Institutional Holdings

QoQ: ↓ 3.9% shares (2026Q1 vs prior)

144 institutional holders · 49.40M shares

#1 FMR LLC 8.10M shares

#2 ORBIMED ADVISORS LLC 5.69M shares

#3 VANGUARD CAPITAL MANAGEMENT LLC 3.75M shares

+ 17 more holders Sign up free to view →

Institutional holder totals are aggregated from ownership filings and may use a different share basis or reporting date than public float. They are not a reconciliation against tradeable float.

Short Interest

Short Interest4.10M

Days to Cover7.5

% of Float11.7%

FINRA data as of Aug 31, 2026

Insider Buy/Sell Ratio

Recent SEC Activity

xbrl XBRL CONVERTIBLE 2024-09-30

Full SEC filing analysis available with free account →

Recent News

No recent news

Factual UPB Dilution Snapshot

Upstream Bio, Inc. (UPB) has a DilutionScore of 38/100, rated Medium dilution risk. Score date: September 12, 2026.

Recent SEC activity tracked for UPB: xbrl on 2024-09-30.

This automatically generated snapshot is assembled from stored DilutionWatch data fields and may contain data-source errors or omissions. It is not financial advice, not investment research, and not a recommendation. Do your own research and review the full disclaimer and terms of service.