13F filings are quarterly SEC disclosures in which institutional investment managers with at least $100 million in qualifying US equity assets report their long holdings. Filed within 45 days of quarter-end, they reveal long equity positions but omit shorts, derivatives, cash, and non-US assets.
Under Section 13(f) of the 1934 Securities Exchange Act, managers exceeding the $100m threshold file Form 13F listing US-traded equities, options, and convertible holdings within 45 days after each calendar quarter. The disclosure is long-only and stale: it captures a single snapshot up to six weeks old, excludes short positions, and permits confidential-treatment delays for accumulating stakes.
In the 2025-2026 narrative cycle, 13F snapshots are routinely over-read — reporters infer billion-dollar short books or "crash calls" from disclosures that by construction show no shorts and are weeks stale, manufacturing positioning stories that the data cannot actually support.
When a high-profile manager's Q1 13F shows large put positions on an index ETF, headlines frequently print a "$1bn bearish bet." But 13F reports the notional of the underlying or the put's market value without revealing whether it hedges a larger long book, was closed days after quarter-end, or sits against offsetting shorts that 13F never discloses — so the inferred "short" is often an artefact of a one-sided, six-week-old snapshot.
Threshold: ≥ $100m in 13(f) securities. Deadline: within 45 days of quarter-end. Scope: long US equities/options/convertibles only — no shorts, cash, FX, or non-US assets.