SEC Form 13H: Large Trader Registration & LTID Engineer Guide 2026
Engineer's guide to SEC Form 13H: large trader thresholds, LTID assignment, broker-dealer monitoring, and why this confidential filing sits outside the public EDGAR feed.
Investing
Stock market, ETFs, bonds, and investment strategies
SEC Form S-3 Shelf Registration: An Engineer's Guide for 2026
From the perspective of an engineer building a SEC EDGAR aggregator: what Form S-3 is, who can file it, how 424B takedowns chain off a shelf, WKSI eligibility, ATM mechanics, and common pipeline pitfalls. Educational only.
SEC Form 3 and Form 5 Insider Filings: An Engineer's 2026 Guide
What SEC Form 3 and Form 5 actually disclose, when they are due, and how to read them on EDGAR alongside the more famous Form 4.
SEC Form 25 Stock Delisting Notification: Engineer Guide 2026
SEC Form 25 is the official notification that removes a security from a national securities exchange. Engineer breakdown: who files it, the 10-day effectiveness rule, Form 25 vs Form 15, and EDGAR pipeline mechanics for tracking delistings.
SEC Form 6-K: Foreign Private Issuer Current Reports — 2026 Engineer's Guide to EDGAR Aggregation
Building FinanceTrackDaily on the SEC EDGAR API exposed an interesting filing pattern: foreign companies listed on US exchanges do not file 8-K. They file Form 6-K instead. This guide walks through Form 6-K from an engineer's perspective — structure, timing, EDGAR endpoints, and what the filing actually tells investors.
SEC EDGAR Full-Text Search API: An Engineer's Guide for 2026
An engineer's view of SEC EDGAR's Full-Text Search API: endpoints, rate limits, pagination quirks, and educational research workflows for retail investors. Educational only, not financial advice.
SEC Form NT Late Filing Notification: An Engineer's 2026 Guide to Rule 12b-25 Filings
When I was building FinanceTrackDaily on top of the SEC EDGAR API, one of the more curious form types I kept encountering in the daily filing feed was Form NT 10-K and Form NT 10-Q. Aggregating filings for over 3,400 US-listed stocks, I...
SEC Form S-4 Explained: M&A Registration Filings 2026 Guide for Investors
How to read SEC Form S-4 merger registration statements on EDGAR — written by the engineer who built FinanceTrackDaily's filing aggregator. Educational, not investment advice.
SEC XBRL Filing Format: Engineer's Guide to Reading 10-K Data 2026
An engineer's walkthrough of the SEC's XBRL machine-readable filing format: what it is, why the SEC requires it, how iXBRL 10-Ks are structured, and what aggregating thousands of filings reveals about the data layer underneath public-company financial statements.
SEC Schedule TO Tender Offer Filings: 2026 Investor Guide to Reading Hostile Takeovers and Buyout Bids
An engineer's guide to SEC Schedule TO — the form a bidder files when launching a tender offer. Covers Williams Act timing, Schedule 14D-9 target responses, friendly vs hostile bids, EDGAR access, and the conditions that decide whether a deal closes. Educational only — not investment advice.
SEC Form D Explained: A Reg D Private Placement Filings Guide for Investors (2026)
An engineer's guide to SEC Form D — the short notice issuers file when claiming a Regulation D exemption. Covers Rules 504, 506(b), and 506(c), the accredited investor thresholds, what's actually in a filing, and how to read Form D on EDGAR. Educational only — not investment advice.
SEC Form 20-F Explained: The Foreign Private Issuer Annual Report Investor Guide (2026)
An engineer's guide to SEC Form 20-F — the annual report foreign private issuers file with the SEC. Covers structure, IFRS vs US GAAP, the 4-month deadline, EDGAR access, and how 20-F differs from 10-K. Educational only — not investment advice.