--- license: apache-2.0 language: - en pretty_name: US Security Master — dated identifiers for SEC filers size_categories: - 1M str | None: hit = spans.filter( (pl.col("kind") == "ticker") & (pl.col("value") == ticker) & (pl.col("valid_from") <= pl.lit(on).str.to_date()) & (pl.col("valid_to") >= pl.lit(on).str.to_date()) ).sort("observations", descending=True) return hit["cik"][0] if hit.height else None cik_for("FB", "2015-06-30") # Meta, under its old symbol cik_for("META", "2015-06-30") # None — the symbol did not exist yet ``` ## What a span means, and what it does not `valid_from` and `valid_to` are the **first and last filing that stated the identifier**, not registry dates. Nobody publishes the day a ticker changed hands. A gap inside a span means nobody filed, not that the identifier lapsed, and `observations` says how much evidence stands behind it. Two flags answer two different questions: * `is_latest_for_filer` — the newest value this company gave. Use it to ask *what did this company last call itself*, including companies that stopped filing in 2011. * `is_current` — that, **and** the company still files. Use it to ask *who owns this ticker now*. Defining current without the second condition left 1 218 tickers current for two companies at once; with it, 54 remain, and those are genuine dual filers. ## The CUSIP bridge 13F and N-PORT identify a holding by CUSIP. Everything else identifies a company by CIK. No free source maps between them, so this one is built: settlement records tie a CUSIP to a ticker on a date, filings tie a ticker to a filer over a span, and the two compose. | Match | Rows | Meaning | |---|---|---| | `ticker_and_dates` | 23 074 | the ticker matched and the dates overlap — **high** | | `cusip6_inherited` | 13 105 | another security of the same issuer resolved — **medium** | | `ticker_only` | 4 145 | the ticker matched, the dates do not overlap — **low** | | `name_conflict` | 683 | a fund, and the filer holding its ticker was never called anything like it — **none** | | `unmatched` | 33 807 | no filer found — **none** | **53.9% of CUSIP-ticker pairs resolve to a filer; 74.8% weighted by how often the CUSIP appears in settlement records, counting only the pairs that are not funds — which is what the build gates on.** Measured against real 13F holdings, the matched set covers **83.1% of holding rows and 87.5% of position value** (82.2% and 86.7% keeping only `high` and `medium`). Every one of those was higher a release ago — 68.8%, 78.7%, 93.9% and 95.0% — because the issuer-prefix rule was lending fund families a stranger's CIK and a coverage metric counts a wrong filer as a hit. Dropping the wrong matches reads as lost coverage. [PIPELINE.md](PIPELINE.md) has what happened. Counting raw CUSIPs understates it badly, and the reason is worth knowing: 10 679 of these rows are funds. A fund settles like a share, and most file nothing under a ticker of their own — `IVV`, `IWM` and `VOO` are lines inside a registrant trust's filings, not filers. They carry `looks_like_fund = true` and are excluded from the coverage the build gates on. Some funds *are* their own trust and do file: `SPY`, `GLD`, `DIA` and `MDY` each resolve to the trust that issues them, and 749 fund rows carry a CIK on that basis. A fund that matched a company only by sharing its ticker is refused instead: `MDY` pointed at Midway Gold until the name check was added. A further 8 527 rows carry a settlement symbol that nobody trades under — clearing placeholders (`XCEMZZZZ`), preferred lines (`BACPRS`), CUSIP fragments. They are real evidence about the instrument and are marked `standard_symbol = false` rather than dropped. ```python bridge = pl.read_parquet("data/cusip_map/*.parquet") holdings = holdings.join( bridge.filter(pl.col("match_confidence").is_in(["high", "medium"])) .select("cusip", "cik"), on="cusip", how="left", ) # now 13F joins to fundamentals and insider trades on `cik` ``` ## Configs | Config | Rows | What one row is | |---|---|---| | `issuers` | 23 553 | one filer: current name, ticker, industry, and how long it has filed | | `identifiers` | 144 054 | one identifier and the span of filings that stated it | | `cusip_map` | 74 814 | one CUSIP, the ticker it settles under, the filer behind it | | `observations` | 10 061 784 | one dated statement — the evidence the spans are built from | | `pit` | 144 054 | one point-in-time identifier event, plus a Delta table for ziplime | `observations` is published so that anyone who disagrees with how the spans were derived can derive their own. It is the only honest way to ship a judgement. ## Where the evidence comes from | Source | Observations | What it gives | |---|---|---| | Form 4 filings, via [ZipLime/insider-trading](https://huggingface.co/datasets/ZipLime/insider-trading) | 8 129 289 | the ticker a company printed on a filing, on that day — the only free source of ticker **history** | | XBRL filings, via [ZipLime/company-fundamentals](https://huggingface.co/datasets/ZipLime/company-fundamentals) | 1 901 363 | names, former names with change dates, industry, incorporation, fiscal year end | | SEC `company_tickers_exchange.json` | 31 132 | today's listings, including companies that never filed a Form 4 | | SEC fails-to-deliver records, 411 archives | 23.5M records | CUSIP to ticker, twice a month since 2004 | `company_tickers.json` alone is what most projects use, and it is a snapshot: it states today and carries no past, so a company that changed symbol appears under the new one for its entire life. The history here comes from four million filings that each stated a symbol on a known date. ## Coverage and honest gaps * **81% of filers have a ticker; 93% of *active* filers do.** The rest are funds, trusts and private filers that never printed one. * **Exchange is sparse** — 8 228 spans. Filers rarely name the venue, and SEC's current map only covers live listings. * **Coverage starts in 1960** only because a filing header stated a name change from then. Ticker evidence effectively begins in 2006 with Form 4, and identifiers before that are not in EDGAR to be found. * **A span is evidence, not a registry.** See above. * **Most fund CUSIPs do not resolve, by construction.** See above. * **54 tickers are current for two filers.** Dual filers and reorganisations mid-transfer; the raw observations let you decide. ## Provenance and updates Sources: SEC EDGAR (Form 4 and XBRL filings, both via sibling ZipLime datasets), `company_tickers_exchange.json`, and the fails-to-deliver files — all US Government works in the public domain. Rebuilt weekly, Monday 07:40 UTC, by a Hugging Face Job ([`jobs/run.py`](jobs/run.py)) that lints, tests, rebuilds, verifies and only then publishes.