What is RIO's dilution risk score?

RIO has a latest available DilutionScore record of 15/100, categorized as low dilution risk by the DilutionWatch scoring model. DilutionWatch displays SEC filing and dilution indicators for RIO, 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 RIO?

DilutionWatch tracks 25 SEC filing types for RIO 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 RIO shareholders?

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

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

RIO Dilution Risk Score: 15/100

Score Breakdown

📋 Offering Ability

💰 Cash Runway

📊Float Risk—

⚠️ Warrant Exposure

🔄 Convertible Debt

Dilution Forecast

☀️

Clear

No significant dilution signals

model est. 0%

No significant dilution signals detected for RIO.

🔔 Track RIO — Get forecast alerts →

Market Data

Market Cap$118.44B

Shares Outstanding1.26B

FloatN/A

Cash$9.42B

Debt$23.75B

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	15/100	DilutionWatch score record
Shares Outstanding	1.26B	Verified float table or market cache
Public Float	Not available	Verified float table or market cache
Market Cap	$118.44B	Market data cache
Cash Runway	Not available	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: 0.

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: ↑ 62.5% shares (2026Q1 vs prior)

87 institutional holders · 52.19M shares

#1 FMR LLC 6.82M shares

#2 Tidal Investments LLC 5.98M shares

#3 FRANKLIN RESOURCES INC 5.02M 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 Interest9.33M

Days to Cover5.2

% of FloatN/A

FINRA data as of Sep 30, 2026

Recent SEC Activity

No recent SEC insights

Recent News

No recent news available for this ticker.

DilutionScore History — Last 90 Days

RIO's DilutionScore is currently 15/100 (Low risk), with 1 score change tracked over 89 days. The score improved from 12/100 (Low risk).

Period	Score	Risk Level	Duration
Aug 19 – Oct 13, 2026	15/100	LOW	56 days
Jul 16 – Aug 18, 2026	12/100	LOW	33 days

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

Share Dilution History

RIO shares outstanding have decreased 0.0% from 1.63B (Apr 2026) to 1.63B (Apr 2026). Each increase represents potential dilution to existing shareholders.

Date	Shares Outstanding	Public Float	Change
Apr 26, 2026	1.63B	1.43B	▲ 0.02%
Apr 07, 2026	1.63B	1.43B	▼ 0.01%

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

Track RIO Dilution Risk in Real-Time

DilutionWatch monitors SEC filings 24/7 and alerts you the moment RIO files a shelf registration, ATM offering, warrant notice, or convertible note. Free tier available — no credit card required.

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📖 Dilution Education

→ Complete Dilution Guide for Retail Investors → Anti-Dilution Provisions Explained → Stock Dilution Red Flags to Watch → Understanding Shelf Registrations

Score Coverage Note

Float Risk is excluded because public-float data is unavailable.

RIO — Rio Tinto Group Dilution Risk Tracker