Unified position tracking across Form 4, 13F, and 13D/G with event-sourced ledger and point-in-time calculations.
/api/v1/ownership/positions/{holder_uuid}/issuer/{issuer_cik}
/api/v1/ownership/positions/{holder_uuid}/issuer/{issuer_cik}/history
/api/v1/ownership/positions/issuer/{issuer_cik}/holders
/api/v1/ownership/positions/issuer/{issuer_cik}/timeline
/api/v1/ownership/cross-reference/{holder_uuid}