Find and update company information (Companies House) adds Alerts, and Data APIs coverage that PCAOB AuditorSearch skips.
VOL. XCIV, NO. 247
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Sunday, October 5, 2025
Head-to-head
Find and update company information (Companies House) vs PCAOB AuditorSearch comparison
Compare pricing, supported platforms, categories, and standout capabilities to decide which tool fits your workflow.
Quick takeaways
Find and update company information (Companies House) highlights: Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data., Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history., and Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express)..
PCAOB AuditorSearch is known for: Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers., Displays engagement partner details, audit firm name and location, and the extent of participation of other firms., and Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time..
Find and update company information (Companies House)
find-and-update.company-information.service.gov.uk
The official UK companies register, providing free search and access to filing histories, document images, and company information. Users can follow companies for email alerts on new filings, and bulk data is available via monthly downloads. Certified copies and certificates are offered for a fee. Developers have access to REST and Streaming APIs with clear rate limits, making the service a reliable, real-time regulatory source.
Platforms
Web
API
Pricing
Free
Quick highlights
- Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data.
- Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history.
- Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express).
- Bulk data available as monthly CSV snapshots of the entire UK companies register.
- Public REST API providing structured access to company data (companies, officers, persons of significant control, etc.), authenticated via API key; some flows support OAuth2. Rate limit of 600 requests per 5 minutes.
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PCAOB AuditorSearch
pcaobus.org
Free public database built from Form AP filings. Users can search audit engagements by company, firm, or partner, or download the full dataset as a CSV file updated daily. Bulk downloads are timestamped in Eastern Time and do not include the ticker field.
Categories
Platforms
Web
Pricing
Free
Quick highlights
- Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers.
- Displays engagement partner details, audit firm name and location, and the extent of participation of other firms.
- Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time.
- Form AP filings are required for each audit of a public company, forming the core of the database.
- Advanced search tools and a contact form are available for deeper queries and user support.
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Overlap
Shared focus areas
1 overlapBoth tools cover this research theme.
Where they differ
Find and update company information (Companies House)
Distinct strengths include:
- Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data.
- Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history.
- Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express).
- Bulk data available as monthly CSV snapshots of the entire UK companies register.
Feature-by-feature breakdown
| Attribute | Find and update company information (Companies House) | PCAOB AuditorSearch |
|---|---|---|
Categories Which research workflows each platform targets | Shared: Regulatory Filings Monitoring Unique: Alerts, Data APIs | Shared: Regulatory Filings Monitoring |
Asset types Supported asset classes and universes | Other | Other |
Experience levels Who each product is built for | Beginner, Intermediate, Advanced | Beginner, Intermediate, Advanced |
Platforms Where you can access the product | Web, API | Web |
Pricing High-level pricing models | Free | Free |
Key features Core capabilities called out by each vendor | Unique
| Unique
|
Tested Verified by hands-on testing inside Find My Moat | Not yet | Not yet |
Editor pick Featured inside curated shortlists | Standard listing | Standard listing |
Frequently Asked Questions
Which workflows do Find and update company information (Companies House) and PCAOB AuditorSearch both support?
Both platforms cover Regulatory Filings Monitoring workflows, so you can research those use cases in either tool before digging into the feature differences below.
Do Find and update company information (Companies House) and PCAOB AuditorSearch require subscriptions?
Both Find and update company information (Companies House) and PCAOB AuditorSearch keep freemium access with optional paid upgrades, so you can trial each platform before committing.
How can you access Find and update company information (Companies House) and PCAOB AuditorSearch?
Both Find and update company information (Companies House) and PCAOB AuditorSearch 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?
Find and update company information (Companies House) differentiates itself with Free search and viewing of company information including registered details, officers, filing history, document images, mortgage charges, and insolvency data., Follow companies and receive email alerts when new filings are accepted, with direct links to the filing history., and Order certified copies and certificates (fees apply, e.g. £15 standard / £50 express)., whereas PCAOB AuditorSearch stands out for Searchable by engagement partner, audit firm, or public company, with support for company name, CIK, ticker, and firm identifiers., Displays engagement partner details, audit firm name and location, and the extent of participation of other firms., and Bulk dataset download in CSV format, updated daily. The file includes all Form AP data fields documented in the dictionary, with timestamps in Eastern Time..
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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.