Data on firm headquarters based on SEC EDGAR filings

Data on firm headquarters based on SEC EDGAR filings. Dates related to SEC filing dates. Rather than provide dates for all filings, data are aggregated into groups of filings by state and CIK and dates are collapsed into windows over which all filings for a given CIK were associated with a given state. For example, CIK 0000037755 has filings with a CA headquarters from 1994-06-02 until 1996-03-25, then filings with an OH headquarters from 1996-05-30 until 1999-04-05, then filings with a CA headquarters from 1999-06-11 onwards. To ensure continuous coverage over the sample period, it is assumed that any change in state occurs the day after the last observed filing for the previous state.

Usage

from era_pl import load_data

data = load_data("state_hq")

Use from era_py import load_data for a pandas dataframe.

Format

53,133 rows and 4 columns. Column types below describe the stored Parquet data; loaders also restore categories and date types using the packaged metadata.

Column	Stored type	Description
cik	string	SEC’s Central Index Key (CIK)
ba_state	string	Two-letter abbreviation of state
min_date	date32[day]	Date of first filing with CIK-state combination in a contiguous series of filings
max_date	date32[day]	Date of last filing with CIK-state combination in a contiguous series of filings

Source

https://sraf.nd.edu/sec-edgar-data/10-x-header-data/

Related R documentation.