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13F filing deadlines by quarter

Every institutional investor managing over $100M must disclose their holdings on Form 13F within 45 days after the end of each quarter. Here are the exact deadlines for 2026, 2027, and how to pull the filings via API within minutes of publication.

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The rule

Under Section 13(f) of the Securities Exchange Act, any institutional investor exercising discretion over $100 million or more in Section 13(f) securities (mostly US-listed equities and options) must file Form 13F within 45 calendar days after the end of each calendar quarter.

There are no early filings and no extensions. The deadline is the deadline.

Deadlines for 2026

| Quarter End | 13F Deadline | Reflects Positions Held As Of | |-------------|--------------|-------------------------------| | March 31, 2026 | May 15, 2026 | March 31, 2026 | | June 30, 2026 | August 14, 2026 | June 30, 2026 | | September 30, 2026 | November 14, 2026 | September 30, 2026 | | December 31, 2026 | February 14, 2027 | December 31, 2026 |

Deadlines for 2027

| Quarter End | 13F Deadline | Reflects Positions Held As Of | |-------------|--------------|-------------------------------| | March 31, 2027 | May 15, 2027 | March 31, 2027 | | June 30, 2027 | August 14, 2027 | June 30, 2027 | | September 30, 2027 | November 15, 2027 | September 30, 2027 | | December 31, 2027 | February 14, 2028 | December 31, 2027 |

Note: When the 45-day deadline lands on a weekend or federal holiday, filings are due the next business day.

What filers actually file

Form 13F contains:

  • All Section 13(f) securities held in discretionary accounts at quarter end
  • CUSIP and issuer name for each security
  • Number of shares held
  • Market value at quarter end (in thousands of USD)
  • Type of holding (Sole, Shared, or Discretion Only)
  • Investment discretion (Sole, Shared, None)

Form 13F does NOT contain:

  • Individual client holdings
  • Short positions
  • Cash balances
  • Non-US securities
  • Real estate or private holdings
  • Options if they are non-listed

Why 13F filings matter (and their limits)

13F is the closest thing to institutional transparency the SEC provides. Every quarter, you get to see what Berkshire Hathaway, Bridgewater, Renaissance Technologies, Two Sigma, and 5,000+ other hedge funds and asset managers actually owned. This is genuinely useful for:

  • Cloning strategies (imperfect, since it lags)
  • Identifying crowded trades
  • Tracking activist campaigns
  • Analyzing sector rotations
  • Detecting institutional accumulation or distribution

The limitations are severe:

  • 45-day lag: A March 31 snapshot doesn't file until May 15. A fund could have exited a position on April 1 and you would never know.
  • No short positions: You see longs only. A fund that is market-neutral looks 100% long on 13F.
  • No timing: You see quarter-end snapshots, not the intra-quarter transactions.
  • No conviction: You cannot tell from 13F whether a position is a core high-conviction bet or a residual small position.
  • Confidential filings: Some managers request confidential treatment for specific positions and file them separately with a delay.

How to get 13F data via API

The SEC publishes 13F filings on EDGAR as they arrive. Raw 13F is XML with a table of holdings. Parsing it correctly requires handling CUSIP-to-ticker mapping, share class distinctions, and derivative disclosures.

EdgarKit ingests every 13F filing within 30 seconds of SEC publication, parses the holdings table, resolves CUSIPs to tickers, and exposes it via JSON:

# Get Berkshire Hathaway's latest 13F
curl -H "x-api-key: $KEY" \
  "https://api.edgarkit.com/v1/filings?form_type=13F-HR&cik=1067983&limit=1"

# Get holdings by fund CIK
curl -H "x-api-key: $KEY" \
  "https://api.edgarkit.com/v1/13f/holdings?cik=1067983&quarter=2026Q1"

Alerting on filings from specific funds

The most common use case is: "tell me the second Berkshire files a new 13F." EdgarKit supports webhooks for this. Register a webhook URL against a fund CIK and you get a POST within seconds of the SEC accepting the filing.

See the Webhook Setup Guide for the working example.

The 13F universe by the numbers

As of the last complete quarter, the 13F universe includes:

  • ~5,000 filing entities
  • ~$40+ trillion in aggregate reported assets
  • ~9,000 distinct securities covered
  • Quarterly cadence, no exceptions

If you are building any product that touches institutional flow analysis, 13F is table stakes. Real-time access to the raw filings the moment they land is the differentiator.

Try it

Signup for a free EdgarKit key at edgarkit.com/#signup. Free tier covers 10,000 requests per month.