What is MPC's dilution risk score?

MPC has a latest available DilutionScore record of 8/100, categorized as low dilution risk by the DilutionWatch scoring model. DilutionWatch displays SEC filing and dilution indicators for MPC, 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 MPC?

DilutionWatch tracks 25 SEC filing types for MPC 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 MPC shareholders?

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

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

MPC Dilution Risk Score: 8/100 (LOW)

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 MPC.

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Market Data

Market Cap$128.85B

Shares Outstanding280.82M

Float291.02M

Cash$7.77B

Debt$5.42B

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	8/100	DilutionWatch score record
Shares Outstanding	280.82M	Verified float table or market cache
Public Float	291.02M	Verified float table or market cache
Market Cap	$128.85B	Market data cache
Cash Runway	Not applicable / unavailable	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: 5.

Recent SEC source mix: 4 5.

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: ↑ 22.6% shares (2026Q1 vs prior)

1893 institutional holders · 286.34M shares

#1 VANGUARD CAPITAL MANAGEMENT LLC 38.34M shares

#2 BlackRock, Inc. 24.39M shares

#3 STATE STREET CORP 19.03M 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 Interest7.04M

Days to Cover2.0

% of Float2.4%

FINRA data as of Sep 30, 2026

Recent SEC Activity

4 INSIDER TRANSACTION 2026-09-01

4 INSIDER TRANSACTION 2026-08-31

4 INSIDER TRANSACTION 2026-08-19

4 INSIDER TRANSACTION 2026-08-17

4 INSIDER TRANSACTION 2026-03-13

Full SEC filing analysis available with free account →

Recent News

No recent news available for this ticker.

Factual MPC Dilution Snapshot

Marathon Petroleum Corporation (MPC) has a DilutionScore of 8/100, rated Low dilution risk. Score date: October 13, 2026.

Recent SEC activity tracked for MPC: 4 on 2026-09-01; 4 on 2026-08-31; 4 on 2026-08-19.

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

MPC's DilutionScore has held steady at 8/100 (Low risk) for 89 consecutive days across the tracked period.

Period	Score	Risk Level	Duration
Jul 16 – Oct 13, 2026	8/100	LOW	89 days

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

Share Dilution History

MPC shares outstanding have decreased 0.0% from 291.94M (May 2026) to 291.94M (May 2026). Each increase represents potential dilution to existing shareholders.

Date	Shares Outstanding	Public Float	Change
May 19, 2026	291.94M	291.02M	▼ 0.01%
May 08, 2026	291.94M	291.06M	▼ 0.97%

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

Track MPC Dilution Risk in Real-Time

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