Event-Driven Stocks

SUTRO BIOPHARMA, INC.

STRO

Other · Non-accelerated filer<br>Smaller reporting company · SEC filings ↗ · Compare ⊕

View price & chart on Yahoo Finance ↗
Signs● 3 good● 4 warning● 2 severedetails ↓

Financials

SEC XBRL · annual
 FY25FY24FY23FY22FY21FY20
Revenue$102.5M$62.0M$153.7M$67.8M$61.9M$7.2M
Operating income−$158.4M−$238.5M−$89.3M−$128.9M−$98.5M−$71.1M
Net income−$191.1M−$227.5M−$106.8M−$119.2M−$105.5M−$19.6M
Total assets$173.8M$387.2M$470.7M$406.9M$341.4M$394.1M
Total liabilities$306.3M$342.6M$321.1M$189.9M$88.8M$62.1M
Equity−$132.5M$44.6M$149.6M$217.0M$252.6M$332.0M
EPS (diluted)$-22.49$-29.40$-1.78$-2.35$-2.29$-0.84
Shares out.83.8M62.4M60.2M46.4M45.9M23.1M

Reported figures from the company's SEC filings (XBRL). Blank where a line item isn't cleanly tagged — never estimated.

Key ratios

from filings · FY2025
Operating margin
−154.5%
Net margin
−186.5%
Return on equity
144.3%
Return on assets
−109.9%
Return on capital (ROCE)
−160.5%
Liabilities / assets
176.2%
Debt / equity
—
Book value / share
$-1.58
Revenue growth (YoY)
65.2%
Net income growth (YoY)
—

Computed from the company's own SEC figures — no market price, so these are facts, not a valuation. Book value per share is reported equity ÷ shares; it is not the stock price.

Financial health

forensic scores · FY2025
Altman Z″ (distress)
-22.06distress
Accruals / assets
−8.0%clean
Piotroski F-Score
3/9weak

Altman Z″is a textbook bankruptcy-distress score from book values only (>2.6 safe · 1.1–2.6 grey · <1.1 distress). Accruals = (net income − operating cash flow) ÷ assets; persistently high accruals are an earnings-quality red flag. Beneish M-Scoreis an eight-ratio screen comparing this year with last (M > −1.78 = elevated manipulation-risk screen, not proof). Piotroski F-Scorecounts how many of nine fundamental-health checks pass (shown as passed / applicable; we use operating margin and total liabilities as documented proxies where the exact input isn't XBRL-tagged). Computed from SEC filings — descriptive factors, not advice or a forecast.

Quality score

EDS Score
49
/ 100
Profitability 20Growth 100Catalyst 33Earnings quality 67Financial strength 25

Our own multi-factor score from free SEC data — profitability, growth, financial strength, earnings quality, and event/ownership catalysts. No market price and no licensed model: each axis is the share of source-backed checks it passes. Descriptive factors, not advice or a forecast. What these scores mean →

Signs

● 2 severe● 4 warning● 3 good
  • Negative shareholder equity
  • Altman Z″ in the distress zone
  • Operating losses (negative operating margin)
  • Reported a net loss
  • High leverage (liabilities > 70% of assets)
  • Negative operating cash flow
  • Strong return on equity (>15%)
  • Revenue is growing year-over-year
  • Clean earnings (low accruals)

Derived from the company's own SEC figures (fundamentals, forensic scores, filing discipline) — descriptive factors, not advice or a forecast.

5%+ owners

SEC Schedule 13D / 13G · last 3 yrs

Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.

Insider transactions

SEC Form 4 · most recent
5 acquisitions0 disposalsnet +3,776 shares · last 5
InsiderDateTypeSharesPrice
Pauling DavidOfficer — Chief Admin. Ofcr. &amp; GCMar 4, 2026Option exercise675$0.00
Chung JaneOfficer — Chief Executive OfficerMar 4, 2026Option exercise788$0.00
Pauling DavidOfficer — Chief Admin. Ofcr. &amp; GCMar 1, 2026Option exercise500$0.00
Gerber Hans-PeterOfficer — CHIEF SCIENTIFIC OFFICERMar 1, 2026Option exercise1,125$0.00
Chung JaneOfficer — Chief Executive OfficerMar 1, 2026Option exercise688$0.00

Headline trade per Form 4 (officers, directors, 10%+ owners). Buy/sell read from the filing's structured data — blank where a field isn't cleanly tagged.

Short interest

FINRA · bi-monthly
SettlementShares shortDays to coverΔ vs prior
May 15, 20261.2M5.6+22.1%
Apr 30, 2026977,1083.9+30.5%
Apr 15, 2026748,6992.9+17.0%
Mar 31, 2026639,7142.8+20.1%
Mar 13, 2026532,6143.2+2.9%

Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.

Material events

SEC Form 8-K · most recent

Events the company reported on Form 8-K, labelled by the SEC item code it filed under — its own classification, not our interpretation.

Recent SEC filings

All filings ↗

Event-driven situations (1)

Spot an error in this record? Report it. Every correction is verified against the source filing before we change anything.