★ BEST INVESTING TOOLS COMPARISON ★
VOL. XCIV, NO. 247
Tool comparison edition
Tool Comparison
AUM 13F vs InsideArbitrage
Pick AUM 13F instead if
AUM 13F
Free • From $29/mo · Web
- You'd rather start free and only pay if you outgrow it
- You want the cheaper way in: plans start at $29/mo instead of $100/mo
Start here
InsideArbitrage
From $100/mo · Web
- Delayed quotes won't cut it; you need real-time data
- You care about news, calendar, and corporate actions & special situations, things AUM 13F doesn't offer
- You're newer to investing and want something approachable
Skip both if: Neither one clicks with how you research; there are strong third options.
See alternativesOutbound links may include affiliate or sponsor codes.
Our take
The bottom line
AUM 13F and InsideArbitrage cover a lot of the same ground (5 shared categories, including institutional ownership, insider data, and watchlist), so for the basics you won't go far wrong with either. InsideArbitrage simply does more: 18 categories to AUM 13F's 6, including news, calendar, and corporate actions & special situations. AUM 13F counters by letting you start free.
What readers say
AUM 13F
Vote once to reveal the community verdict.
InsideArbitrage
Vote once to reveal the community verdict.
Key differences at a glance
- Free plan
- AUM 13F
- Cheaper paid plan
- AUM 13F$29/mo vs $100/mo
- Broader coverage
- InsideArbitrage18 vs 6 categories
- Real-time data
- InsideArbitrage
- Asset coverage
- AUM 13FAdds hedge funds and private funds
- Beginner friendly
- InsideArbitrage
See for yourself
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.ShowHide
How they stack up
The side-by-side table: pricing, platforms, data, and coverage at a glance.| Attribute | ||
|---|---|---|
| Pricing & plans | ||
Starting price | Free • From $29/mo | From $100/mo |
Free tier | Yes | No |
Free trial | — | — |
Plan limits | Free: daily views: Limited (not disclosed) | — |
| Platforms & access | ||
Web app | Yes | Yes |
Mobile app | No | No |
API access | No | No |
Broker sync | — | No |
| Audience & fit | ||
Experience level | Intermediate, Advanced | Beginner, Intermediate, Advanced |
Best for | Institutional Investors and Analysts | — |
Categories covered | 6 | 18 |
Regions | — | North America |
| Data & capabilities | ||
Data quality | — | 4 signals: Latency: Real-time and End of Day, Granularity: EOD +2 more |
Capabilities | — | Universe builder |
| Try it | Visit AUM 13F | Visit InsideArbitrage |
Where each one shines
What AUM 13F and InsideArbitrage each do best.ShowHide
Where each one shines
What AUM 13F and InsideArbitrage each do best.What AUM 13F does best
- Research asset managers using public filing sources such as EDGAR, IAPD, and CAFR-linked records.
- Browse large-manager AUM rankings, firm profiles, AUM history, AUM breakdowns, and manager-level holdings context.
- Filter managers by fund type, tags, location, AUM size, and related public-filing attributes.
- Open firm pages that combine AUM data, Form 13F holdings, sector views, and links to underlying filing documents.
- Use the latest EDGAR filings feed with filing-type filters for 13F, Form D, 8-K, 10-Q, 10-K, insider forms, and other disclosures.
What InsideArbitrage does best
- Track announced merger-arbitrage deals with spread context, calendars, deal updates, Deals in the Works, and post-mortem research.
- Use tracked-deal workflows to filter relevant news, SEC filings, and tweets around the active-deal symbols a premium user follows.
- Research insider activity with Insider Weekends, cluster buys, buys near highs, flip-floppers, top-performing insiders, sector heat maps, and premium insider screens.
- Monitor buyback situations through daily buyback announcements, searchable buyback history, Buyback Wednesdays, and Double Dipper screens that combine insider buying with repurchases.
- Follow spinoffs, completed spinoffs, Spinsider ideas, CVR deals, CVR outcomes, tender offers, reverse splits, activist campaigns, C-suite transitions, and M&A news feeds.
Every detail we compared
Every tracked attribute for AUM 13F and InsideArbitrage, side by side.ShowHide
Every detail we compared
Every tracked attribute for AUM 13F and InsideArbitrage, side by side.| Attribute | ||
|---|---|---|
| Coverage & fit | ||
Asset types | StocksETFsHedge FundsPrivate FundsReal EstateFunds | StocksETFs |
Experience | IntermediateAdvanced | BeginnerIntermediateAdvanced |
Target audience | Institutional InvestorsAnalysts | Not specified |
Regions | Not specified | North America |
Coverage details | Identifiers: CIK, CUSIP, and Ticker | Countries: USExchanges: XNYS, XNAS, and ARCXIdentifiers: Ticker and CIK |
| Data | ||
Data freshness | Not specified | Real-timeEnd of Day |
Data granularity | Not specified | EOD |
| Access & integrations | ||
Import methods | Not specified | Manual |
| Plans & trust | ||
Capability signals | Not specified | Universe builder |
Vendor & support | Chen Software LLCSupport: Email | InsideArbitrageCountry: USSupport: Email |
Curation ratings | Not specified | Methodology 3/5Reliability 3/5UX 4/5 |
Green tags are exclusive to that tool in this comparison.
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.ShowHide
What you'll actually pay
Plans, billing, trials, and per-month pricing for both tools.| Tier | ||
|---|---|---|
| Free plan | Freedaily views: Limited (not disclosed) | — |
| Entry paid plan | $29/mo“Subscription” | $100/mo“Premium – Annual” |
| Tier 2 | — | $150/mo“Premium – Monthly” |
| Tier 3 | — | $300/mo“IA Professional – Annual” |
| Top plan | — | $400/mo“IA Professional (4 seats)” |
Questions we keep getting
What's the difference between AUM 13F and InsideArbitrage?
AUM 13F leans toward institutional ownership, insider data, and improved filings, while InsideArbitrage puts more weight on news, alerts, and calendar. They overlap in 5 categories, so for most people it comes down to workflow preference and price.
Is AUM 13F or InsideArbitrage free to use?
AUM 13F has a free tier, so you can get started without paying anything. InsideArbitrage is paid-only. If budget matters, start with AUM 13F and see how far it takes you before opening your wallet.
Which is better for beginners: AUM 13F or InsideArbitrage?
InsideArbitrage is the friendlier place to start; its interface takes less getting used to. Both work fine once you're past the basics.
Should I choose AUM 13F or InsideArbitrage?
It depends on what you're after. Pick AUM 13F if improved filings matter to you; go with InsideArbitrage if you'd rather have news and calendar. And if you only need the basics both share, let price decide.
What asset classes do AUM 13F and InsideArbitrage cover?
Both cover stocks and ETFs. AUM 13F also handles hedge funds, private funds, and real estate.
Does AUM 13F or InsideArbitrage have real-time data?
InsideArbitrage offers real-time data, which matters if you trade actively. AUM 13F runs on delayed or end-of-day data, which is perfectly fine for longer-term investors who don't live and die by the tick.
Which has a better stock screener: AUM 13F or InsideArbitrage?
InsideArbitrage has a stock screener for surfacing ideas; AUM 13F doesn't, and focuses its energy elsewhere.
Can I track my portfolio with AUM 13F or InsideArbitrage?
InsideArbitrage handles portfolio tracking. AUM 13F is really a research tool; you'd track your portfolio elsewhere.
Keep researching
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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.