---
title: "One fund's portfolio Δ between two retained quarters"
method: GET
path: "/api/v1/sec/13f/{cik}/changes"
tags: ["Hedge Fund Intelligence"]
---

# One fund's portfolio Δ between two retained quarters

`GET /api/v1/sec/13f/{cik}/changes`

Position-level delta between two quarters for one institutional manager (CIK). Without query params: latest 2 quarters from the manifest (most-recent vs previous). With `from_quarter` + `to_quarter`: both stems validated against the manifest. Composite diff key is `(cusip, put_call, title)`; multiple INFOTABLE rows with the same key but different investment_discretion / voting / co-manager are aggregated by sum(value)+sum(shares) before diff. `filer_status_*` is `filed` or `not_filed` per quarter - useful for spotting deregistration or new filings. 409 when manifest has <2 quarters and no params provided; 404 when CIK absent from BOTH stems.

## Path parameters

- `cik` string, required — SEC EDGAR CIK; leading zeros optional.

## Query parameters

- `from_quarter` string, nullable — Older stem (`ddmmmyyyy-ddmmmyyyy` or `yyyyqN`). Default: prior to most-recent.
- `to_quarter` string, nullable — Newer stem. Default: most-recent stem in retention.

## Response `200`

Composite-key position delta for one CIK across two quarters.

- EnvelopeSec13fCikChanges
  - `data` Sec13fCikChanges, required — Delta-positions between two quarters for one fund (CIK).
    - `cik` string, required
    - `manager_name` string, required
    - `from_stem` string, required
    - `to_stem` string, required
    - `filer_status_from` string, required — Whether CIK filed in from_stem.
    - `filer_status_to` string, required — Whether CIK filed in to_stem.
    - `positions_added` Sec13fPosition[], required — In to_stem only (composite-key aggregation).
      - `issuer` string, required
      - `title` string, required — Class title (e.g. COM = common stock).
      - `cusip` string, required
      - `figi` string, nullable — Bloomberg FIGI; often empty in SEC bulk.
      - `value_usd_thousands` integer, nullable — Holding market value in $thousands as filed.
      - `shares` integer, nullable — Share/principal amount.
      - `shares_type` string, required — SH = shares; PRN = principal amount (debt).
      - `put_call` string, nullable — None for direct holdings.
      - `investment_discretion` string, required
      - `voting_sole` integer, required — Voting authority: shares with sole voting power.
      - `voting_shared` integer, required — Voting authority: shares with shared voting power.
      - `voting_none` integer, required — Voting authority: shares with no voting power.
      - `accession` string, required
      - `period_of_report` string, required
      - `other_manager_cik` string, nullable — OWNER_CIK resolved from OTHERMANAGERS.tsv via INFOTABLE.OTHERMANAGER sequence number JOIN, 10-digit zero-padded string (matches Sec13fFiler.cik and Sec13fPosition.cik). Null when no co-manager OR seq unresolved. String type preserves leading zeros so joins to EDGAR / W3 SEC ADV string CIK keys work; an int field stripped 0001067983 -> 1067983 and broke those joins.
      - `other_manager_name` string, nullable — OTHER_INCLUDED_MANAGERS_NAME resolved from OTHERMANAGERS.tsv. Null when no co-manager OR seq unresolved.
      - `other_manager_seq` integer, nullable — Raw INFOTABLE.OTHERMANAGER sequence number, retained for debugging. Null when INFOTABLE row had no OTHERMANAGER reference.
    - `positions_removed` Sec13fPosition[], required — In from_stem only (composite-key aggregation).
      - `issuer` string, required
      - `title` string, required — Class title (e.g. COM = common stock).
      - `cusip` string, required
      - `figi` string, nullable — Bloomberg FIGI; often empty in SEC bulk.
      - `value_usd_thousands` integer, nullable — Holding market value in $thousands as filed.
      - `shares` integer, nullable — Share/principal amount.
      - `shares_type` string, required — SH = shares; PRN = principal amount (debt).
      - `put_call` string, nullable — None for direct holdings.
      - `investment_discretion` string, required
      - `voting_sole` integer, required — Voting authority: shares with sole voting power.
      - `voting_shared` integer, required — Voting authority: shares with shared voting power.
      - `voting_none` integer, required — Voting authority: shares with no voting power.
      - `accession` string, required
      - `period_of_report` string, required
      - `other_manager_cik` string, nullable — OWNER_CIK resolved from OTHERMANAGERS.tsv via INFOTABLE.OTHERMANAGER sequence number JOIN, 10-digit zero-padded string (matches Sec13fFiler.cik and Sec13fPosition.cik). Null when no co-manager OR seq unresolved. String type preserves leading zeros so joins to EDGAR / W3 SEC ADV string CIK keys work; an int field stripped 0001067983 -> 1067983 and broke those joins.
      - `other_manager_name` string, nullable — OTHER_INCLUDED_MANAGERS_NAME resolved from OTHERMANAGERS.tsv. Null when no co-manager OR seq unresolved.
      - `other_manager_seq` integer, nullable — Raw INFOTABLE.OTHERMANAGER sequence number, retained for debugging. Null when INFOTABLE row had no OTHERMANAGER reference.
    - `positions_changed` Sec13fPositionDelta[], required — In both, value or shares differ.
      - `cusip` string, required
      - `title` string, required
      - `put_call` string, nullable
      - `value_usd_thousands_from` integer, nullable
      - `value_usd_thousands_to` integer, nullable
      - `value_usd_thousands_delta` integer, nullable
      - `shares_from` integer, nullable
      - `shares_to` integer, nullable
      - `shares_delta` integer, nullable
      - `raw_row_count_from` integer, required — Distinct INFOTABLE rows aggregated into this key in from_stem.
      - `raw_row_count_to` integer, required — Distinct INFOTABLE rows aggregated into this key in to_stem.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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