What is STRO's dilution risk score?

STRO has a latest available DilutionScore record of 49/100, categorized as medium dilution risk by the DilutionWatch scoring model. DilutionWatch displays SEC filing and dilution indicators for STRO, 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 STRO?

DilutionWatch tracks 25 SEC filing types for STRO 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 STRO shareholders?

Stock dilution occurs when a company issues new shares, reducing the ownership percentage of existing shareholders. For STRO, 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 STRO tracking?

DilutionWatch provides a free tier that shows DilutionScores and basic filing history for STRO. 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.

STRO Dilution Risk Score: 49/100 (MEDIUM)

Score Breakdown

📋 Offering Ability

40

💰 Cash Runway

65

📊 Float Risk

30

⚠️ Warrant Exposure

40

🔄 Convertible Debt

40

Dilution Forecast

☀️

Clear

No significant dilution signals

model est. 7%

💰 Capital Raise model 15%

• Under 12 months cash (8mo)

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Market Data

Market Cap$484.35M

Shares Outstanding16.58M

Float10.30M

Cash$164.35M

Debt$4.06M

Short InterestN/A

Institutional Holdings

QoQ: ↑ 367.3% shares (2026Q1 vs prior)

12 institutional holders · 1.99M shares

#1 BARCLAYS PLC 1.40M shares

#2 Merck & Co., Inc. 272.4K shares

#3 MORGAN STANLEY 241.9K shares

+ 9 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 Interest1.74M

Days to Cover6.3

% of Float16.9%

FINRA data as of Jul 31, 2026

Insider Buy/Sell Ratio

Recent SEC Activity

xbrl XBRL CONVERTIBLE 2018-12-31

Full SEC filing analysis available with free account →

Recent News

No recent news

Factual STRO Dilution Snapshot

Sutro Biopharma, Inc. (STRO) has a DilutionScore of 49/100, rated Medium dilution risk. Score date: August 28, 2026.

Recent SEC activity tracked for STRO: xbrl on 2018-12-31.

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.