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49 /100
MEDIUM RISK
Score updated Oct 13, 2026

STRO — Sutro Biopharma, Inc. Dilution Risk Tracker

Track STRO dilution risk with DilutionWatch's stock tracker. DilutionScore™ measures dilution risk across 5 factors — lower scores indicate higher risk of share dilution.

⚠️ Not financial advice. Do your own research before making any investment decisions.

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As of October 13, 2026, Sutro Biopharma, Inc. (STRO) has a DilutionWatch DilutionScore of 49/100, rated MEDIUM dilution risk. Sutro Biopharma, Inc. has a market capitalization of $220.20M, 16.58M shares outstanding, 12 institutional holders tracked.

This page includes automatically generated factual summaries from DilutionWatch data. It is not financial advice, not investment research, and not a recommendation. Do your own research. Read the full disclaimer and terms of service.

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$220.20M
Shares Outstanding16.58M
Float10.30M
Cash$164.35M
Debt$4.06M
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.

FieldCurrent ValueBasis
DilutionScore49/100DilutionWatch score record
Shares Outstanding16.58MVerified float table or market cache
Public Float10.30MVerified float table or market cache
Market Cap$220.20MMarket data cache
Cash Runway8.4 monthsDilutionWatch score inputs
Shelf CapacityNone in current score inputsSEC-derived dilution fields
ATM CapacityNone in current score inputsSEC-derived dilution fields
Outstanding WarrantsNone in current score inputsSEC-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: ↑ 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 Interest1.85M
Days to Cover6.5
% of Float17.9%
FINRA data as of Sep 30, 2026

Recent SEC Activity

xbrl XBRL CONVERTIBLE 2021-03-18
Full SEC filing analysis available with free account →

Recent News

No recent news available for this ticker.

Factual STRO Dilution Snapshot

Sutro Biopharma, Inc. (STRO) has a DilutionScore of 49/100, rated Medium dilution risk. Score date: October 13, 2026.

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.

DilutionScore History — Last 90 Days

STRO's DilutionScore is currently 49/100 (Medium risk), with 3 score changes tracked over 89 days. The score deteriorated from 50/100 (Medium risk).

Period Score Risk Level Duration
Oct 13, 202649/100MEDIUM1 day
Sep 30 – Oct 12, 202650/100MEDIUM13 days
Jul 17 – Sep 29, 202649/100MEDIUM74 days
Jul 16, 202648/100MEDIUM1 day

Score recalculated daily from SEC filings and market data. Sign up free for real-time score change alerts.

Share Dilution History

STRO shares outstanding have increased 1.1% from 16.39M (Mar 2026) to 16.57M (May 2026). Each increase represents potential dilution to existing shareholders.

Date Shares Outstanding Public Float Change
May 29, 202616.57M10.30M▼ 1.96%
May 17, 202616.57M10.51M▼ 21.03%
May 04, 202616.57M13.31M▼ 6.64%
Apr 26, 202616.57M14.25M▼ 5.93%
Mar 28, 202616.57M15.15M▲ 0.10%
Mar 27, 202616.57M15.14M▲ 92.99%
Mar 26, 202616.45M7.84M▲ 0.83%
Mar 17, 202616.39M7.78M▼ 0.02%
Mar 09, 202616.39M7.78M▼ 0.02%
Mar 05, 202616.39M7.78M▼ 0.05%

Share counts sourced from verified regulatory filings. Increases indicate dilution events.

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