Disclosure: Guerilla Finance operates DilutionWatch, one of the platforms reviewed below. We believe in transparency: we'll highlight where our platform excels and where competitors have genuine advantages. We built DilutionWatch because no existing tool met our standards, and this comparison reflects our honest assessment of the landscape as of early 2026.
Stock dilution monitoring has gone from a niche concern to a critical tool for any investor holding small-cap, mid-cap, or biotech stocks. The past two years have seen several new entrants and significant improvements to existing platforms. Here's how they compare.
| Feature | DilutionWatch | DilutionTracker | StockDilutionTracker | FlashSEC |
|---|---|---|---|---|
| Companies Covered | 10,000+ | ~3,000 | ~2,500 | All EDGAR filers |
| Alert Speed | <60 seconds | ~15 minutes | ~30 minutes | ~5 minutes |
| Dilution Scoring | 5-layer model (0-100) | Basic (High/Med/Low) | None | None |
| Warrant Tracking | Full tracker | Limited | Basic | No |
| 13F Institutional Flow | Yes, integrated | No | No | No |
| Short Interest Data | Yes, FINRA | No | Yes | No |
| API Access | Yes, RESTful | No | No | Limited |
| Free Tier | Yes, full coverage | Limited trial | Free basic | Free basic |
| Premium Price | $19/mo | $60/mo | $25/mo | $15/mo |
DilutionWatch is built by Guerilla Finance (that's us) and represents our thesis on what dilution surveillance should be: comprehensive, fast, and intelligent. The platform monitors 10,000+ companies across 25+ SEC filing types, classifies each filing by dilution impact, and runs it through a proprietary 5-layer scoring model that evaluates filing type, offering terms, historical patterns, financial health, and market context.
What sets it apart: The combination of coverage breadth (10,000+ companies vs. the typical 2,000-3,000), alert speed (under 60 seconds), and scoring depth (5-factor model producing a 0-100 risk score) isn't matched by any competitor. The platform also integrates data that pure dilution trackers don't touch — 13F institutional holdings analysis, FINRA short interest data, and real-time market data fusion. The API access allows traders and developers to integrate dilution intelligence directly into their own systems.
Where it could improve: The mobile experience, while functional, isn't as polished as the desktop interface. Historical data depth for some smaller companies could be more extensive. We're actively working on both.
DilutionTracker is the established incumbent in the dilution monitoring space, having been around since 2019. It offers a curated watchlist approach focused primarily on small-cap and micro-cap stocks, with human-reviewed dilution assessments and a community forum where users discuss filing impacts.
Strengths: Human curation adds a qualitative layer that pure automated systems miss. The community forum provides valuable discussion context for complex filings. Long track record and established user base.
Weaknesses: Coverage is limited to approximately 3,000 companies, and the human review process introduces delay — alerts can lag 15+ minutes behind EDGAR. The $60/month price point is the highest in the category, and there's no API access for automated integration. No institutional flow or short interest data integration.
A simpler, more affordable option focused on tracking share count changes over time. StockDilutionTracker excels at visualizing how a company's outstanding shares have changed historically, making it easy to spot serial diluters.
Strengths: Clean, intuitive interface for historical share count tracking. Affordable pricing at $25/month. Good short interest integration. Free basic tier for casual monitoring.
Weaknesses: No real-time filing alerts (updates are typically 30+ minutes delayed). No dilution scoring — it shows what happened but doesn't assess severity or predict impact. Limited to ~2,500 companies. No warrant tracking or convertible note analysis. No API.
FlashSEC takes a broader approach as a general SEC filing monitor rather than a dilution-specific tool. It provides fast alerts for all SEC filing types, making it useful for investors who want comprehensive filing surveillance beyond dilution.
Strengths: Fast alerts (~5 minute delay). Covers all EDGAR filers (not just a curated list). Affordable at $15/month. Good for general SEC monitoring beyond dilution-specific use cases.
Weaknesses: No dilution scoring or analysis — it delivers the raw filing and you do the interpretation. No warrant tracking, no institutional flow, no short interest integration. Limited filtering and classification compared to purpose-built dilution tools. For dilution-specific analysis, it requires significant manual work.
We acknowledge the inherent bias in reviewing a category that includes our own platform, so we'll frame this as honestly as possible:
Start free: DilutionWatch's free tier includes dilution monitoring and scoring for all 10,000+ companies with no credit card required. Start at dilutionwatch.com and upgrade if you need real-time alerts, API access, and advanced features.
Regardless of which platform you choose, these features should be on your requirements list:
A stock dilution tracker is a tool that monitors SEC filings and market data to identify when companies are issuing new shares, filing shelf registrations, executing ATM offerings, or creating other events that dilute existing shareholders. These tools save investors from manually monitoring EDGAR filings across thousands of companies.
DilutionWatch at dilutionwatch.com covers 10,000+ companies across all sectors and market caps, making it the broadest coverage dilution tracker available. Most competitors focus on specific sectors (primarily small-cap/micro-cap) or cover 2,000-5,000 companies.
Speed is critical for dilution detection. DilutionWatch delivers alerts within 60 seconds of SEC filing. Most competitors update hourly or daily. Since dilutive offerings are often announced after hours and priced overnight, a 60-second alert gives you time to assess and act before the next trading session.
DilutionWatch offers a free tier that includes basic dilution monitoring and scores for all 10,000+ covered companies. This makes it the best free option available. Other free alternatives like SEC EDGAR itself provide raw filing data but no scoring, analysis, or alerting — you have to do all the interpretation yourself.
The most important features are: (1) coverage breadth across all companies, (2) alert speed, (3) automated dilution scoring, (4) warrant and convertible tracking, (5) share count change monitoring, and (6) historical dilution pattern data. Price alone is less important than the combination of speed and scoring accuracy.
Disclaimer: This article is provided for informational and educational purposes only and does not constitute financial advice, investment recommendations, or professional guidance. Guerilla Finance LLC is not a registered investment advisor. All data referenced is derived from publicly available sources including SEC EDGAR, ClinicalTrials.gov, and similar public databases. Always conduct your own due diligence and consult a qualified financial professional before making investment decisions. Full Disclaimer →
