Form 4 Insider Trade Filings Lag by 2 Days on Average, Up to 8.6 Years at Worst

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An analysis of 10,951 SEC Form 4 insider trade filings from July 2026 found that the median delay between a transaction date and public dissemination on EDGAR is two days, though the gap can stretch to over eight years in extreme cases. While 92.9% of filings met the SEC's two-business-day deadline, roughly 4% arrived more than five calendar days late, and 110 filings were delayed beyond 90 days. Open-market purchase filings — the category most studied in insider-trading research — were the least punctual, with one in five missing the deadline window. By contrast, open-market sale filings were nearly always on time, likely due to streamlined broker-assisted paperwork pipelines. The study warns that financial backtests using transaction dates instead of filing dates risk look-ahead bias, effectively trading on information that was not yet publicly available.

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GPU Cloud Cost Goes Beyond Hourly Rates, Reddit Data Shows

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Shopify enables WebMCP agent tools by default across all Liquid storefronts

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ProgrammingDEV Community ·

Xiaomi Enters NAS Market with 4-Bay Smart Storage Device Priced at 2,699 RMB

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