VOL. XCIV, NO. 247

★ FINANCIAL TOOLS & SERVICES DIRECTORY ★

PRICE: 5 CENTS

Sunday, December 7, 2025

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Tool Comparison

CatalystWire vs InsideArbitrage comparison

Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.

Quick takeaways

InsideArbitrage includes Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Dividends, Splits, Insider Data, Institutional Data, 13F, 13D/13G, Screeners, Data Visualizations, Portfolio, Watchlist, Blogs, Newsletters, Videos, Playbooks & Case Studies, and PDF Annotation categories that CatalystWire omits.

InsideArbitrage keeps a free entry point that CatalystWire lacks.

In depth comparison

CatalystWire logo

CatalystWire

catalystwire.co

RNS-first discovery tool for UK equities. Uses AI to scan and categorize London Stock Exchange RNS announcements in real time (e.g., management changes, turnarounds). Best suited to event‑driven and small/mid‑cap investors tracking UK market catalysts. Public docs do not show a pricing table or API; fields left intentionally minimal pending vendor confirmation.

Platforms

Web

Pricing

Subscription

Quick highlights

  • AI scanning of hundreds of RNS announcements per day to surface potential catalysts.
  • Real‑time classification of market‑moving events as they are released.
  • UK‑centric focus aligned to LSE’s Regulatory News Service (Main Market & AIM).

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InsideArbitrage logo

InsideArbitrage

insidearbitrage.com

Event‑driven research platform by Asif Suria focused on merger arbitrage, insider transactions, spinoffs, buybacks, activists, and related special situations. Premium includes tools like the Merger Arbitrage Tool, CVR database, buyback & spinoff trackers, premium screens (IA Score, cluster buys, ‘double dipper’), ‘Deals‑in‑the‑Works’ and deal calendars. IA Professional adds pro‑only features (e.g., CVR outcomes, activist tracker, reverse‑splits tracker, Insider Performance Score) and multi‑seat licensing.

Platforms

Web

Pricing

FreeSubscription

Quick highlights

  • Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
  • Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
  • Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
  • Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.
  • Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards.

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Where they differ

InsideArbitrage

Distinct strengths include:

AlertsCalendarAcquisitionsSpin-offsBuybacks & AuthorizationsDividendsSplitsInsider Data
  • Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
  • Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
  • Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
  • Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.

Feature-by-feature breakdown

AttributeCatalystWireInsideArbitrage
Categories

Which research workflows each platform targets

Shared: News, Regulatory Filings Monitoring

Shared: News, Regulatory Filings Monitoring

Unique: Alerts, Calendar, Acquisitions, Spin-offs, Buybacks & Authorizations, Dividends, Splits, Insider Data, Institutional Data, 13F, 13D/13G, Screeners, Data Visualizations, Portfolio, Watchlist, Blogs, Newsletters, Videos, Playbooks & Case Studies, PDF Annotation

Asset types

Supported asset classes and universes

Stocks

Stocks, ETFs

Experience levels

Who each product is built for

Intermediate, Advanced

Beginner, Intermediate, Advanced

Platforms

Where you can access the product

Web

Web

Pricing

High-level pricing models

Subscription

Free, Subscription

Key features

Core capabilities called out by each vendor

Unique

  • AI scanning of hundreds of RNS announcements per day to surface potential catalysts.
  • Real‑time classification of market‑moving events as they are released.
  • UK‑centric focus aligned to LSE’s Regulatory News Service (Main Market & AIM).

Unique

  • Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems.
  • Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map.
  • Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks).
  • Spinoff suite: upcoming/completed spinoffs and ‘Spinsider’ screen; CVR deals database with outcomes.
  • Gurus/Institutional holdings pages aggregating 13F/13D/13G and Form 4 into manager dashboards.
  • Event‑driven monitor & M&A news feed; earnings calendar; tender‑offers tracker; activist‑campaign tracker; C‑suite transitions tool.
Tested

Verified by hands-on testing inside Find My Moat

Not yet

Not yet

Editor pick

Featured inside curated shortlists

Standard listing

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Frequently Asked Questions

Which workflows do CatalystWire and InsideArbitrage both support?

Both platforms cover News, and Regulatory Filings Monitoring workflows, so you can research those use cases in either tool before digging into the feature differences below.

Which tool offers a free plan?

InsideArbitrage offers a free entry point, while CatalystWire requires a paid subscription. Review the pricing table to see how the paid tiers compare.

How can you access CatalystWire and InsideArbitrage?

Both CatalystWire and InsideArbitrage prioritize web or desktop access. Investors wanting a mobile-first workflow may need to rely on responsive web views.

What unique strengths set the two platforms apart?

CatalystWire differentiates itself with AI scanning of hundreds of RNS announcements per day to surface potential catalysts., Real‑time classification of market‑moving events as they are released., and UK‑centric focus aligned to LSE’s Regulatory News Service (Main Market & AIM)., whereas InsideArbitrage stands out for Merger Arbitrage Tool with announced‑deal lists, spread tracking, calendars and deal updates; ‘Deals in the Works’ and deal post‑mortems., Insider data hub with ‘Insider Weekends’, cluster buys, buys near highs, flip‑floppers, top‑performing insiders and sector heat‑map., and Buyback suite: daily buyback announcements, searchable buyback history, ‘Buyback Wednesdays’, and ‘Double Dipper’ (insiders + buybacks)..

Keep exploring

Keep exploring

Stay on top of related tools

Browse the categories and profiles that overlap most with this comparison to round out your shortlist.

Recommended tools

These profiles share overlapping coverage with both sides of this matchup.

Curation & Accuracy

This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).

Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.