Form 13F Holdings Reports API
Form 13F is a quarterly report that must be filed by institutional investment managers who exercise investment discretion over $100 million or more in "13F securities." This includes equity securities traded on national exchanges and certain over-the-counter securities.
These filings provide unprecedented transparency into the holdings of major institutional investors including hedge funds, pension funds, mutual funds, and other large asset managers.
Form 13F Document Structure
Each section of a Form 13F highlights a different angle of institutional portfolio holdings. Use this breakdown to map filings directly into your data warehouse or dashboards.
Cover Page
Manager identity & filing reference
| Manager | Berkshire Hathaway Inc |
| Report Date | 2024-03-31 |
| Total Value | $372,000,000,000 |
| Manager CIK | 0001067983 |
Use this block to cross-check manager metadata and portfolio value integrity before downstream processing.
Summary Page
Portfolio overview & management authority
| Securities | 47 different holdings |
| Management | Sole voting authority |
| Discretion | Full investment discretion |
| Other Mgrs | None |
Summary data enables quick portfolio composition analysis and manager authority verification.
Holdings Detail
Individual positions & market values
| Security | Apple Inc (AAPL) |
| CUSIP | 037833100 |
| Shares | 789,482,611 |
| Mkt Value | $135,400,000,000 |
| Put/Call | None |
| Inv. Discr. | Sole |
Position-level data enables tracking of smart money movements and portfolio concentration analysis.
Decode the signals
Build a smart money tracking dashboard by chaining these fields with your market data. Start with manager_cik, cusip, and market_value, then layer derived metrics from our metric endpoint.
Position changes
Compare quarter-over-quarter holdings to identify new positions, exits, and size adjustments.
Concentration analysis
Calculate portfolio concentration metrics to assess risk exposure and investment style.
Manager tracking
Follow top institutional investors to identify trends and potential market-moving positions.
Form 13F Filing Lifecycle
Understanding how institutional holdings move from quarter-end to API availability
Quarter Ends
Institutional managers snapshot holdings
Filed with SEC
Within 45 days of quarter end
API Available
Holdings data accessible via API
Filing Requirements & Schedule
Who Must File
Filing Schedule
Holdings Data Structure
Each 13F filing contains detailed holdings information for every qualifying position
Position Details
Security name and CUSIP identifier, share count and market value, investment discretion type, and voting authority details
Manager Information
Institutional manager name and CIK, report date and filing date, total portfolio value, and number of holdings disclosed
Important Notes
Reporting Lag
Holdings are as of quarter-end but filed up to 45 days later. Positions may have changed significantly since the report date.
Limited Scope
Only covers 13F securities (mainly equities). Bonds, commodities, derivatives, and private investments are not included.
Best Practices
| Practice | Benefit | Implementation |
|---|---|---|
| Track position changes | Focus on new positions, exits, and significant size changes | Quarter-over-quarter position analysis |
| Analyze concentration | Monitor portfolio concentration and position sizing | Calculate position size relative to total AUM |
| Aggregate multiple managers | Look for consensus among top institutions | Cross-reference holdings across managers |