SEC 13-F Analysis Skill

Overview

SEC Form 13-F datasets consist of TSV files downloaded from EDGAR. Each quarter has the same file structure.

Key Files

File	Purpose
COVERPAGE.tsv	Fund identity: FILINGMANAGER_NAME, ACCESSION_NUMBER, REPORTCALENDARORQUARTER
SUMMARYPAGE.tsv	Aggregated stats: TABLEVALUETOTAL (AUM in thousands), TABLEENTRYTOTAL (number of holdings)
INFOTABLE.tsv	Individual holdings: CUSIP, NAMEOFISSUER, VALUE (thousands), SSHPRNAMT (shares)
SUBMISSION.tsv	Filer metadata

Common Tasks

Load data with pandas

import pandas as pd

q3_dir = "/root/2025-q3"
coverpage = pd.read_csv(f"{q3_dir}/COVERPAGE.tsv", sep="\t", dtype=str)
summarypage = pd.read_csv(f"{q3_dir}/SUMMARYPAGE.tsv", sep="\t", dtype=str)
infotable = pd.read_csv(f"{q3_dir}/INFOTABLE.tsv", sep="\t", dtype=str)

Get AUM for a fund (by accession_number)

row = summarypage[summarypage["ACCESSION_NUMBER"] == accession_number]
aum_thousands = int(row["TABLEVALUETOTAL"].iloc[0])
aum_dollars = aum_thousands * 1000

Get holdings count

holdings = infotable[infotable["ACCESSION_NUMBER"] == accession_number]
num_holdings = len(holdings)
# Or use TABLEENTRYTOTAL from SUMMARYPAGE for the reported count

Get holdings detail

holdings = infotable[infotable["ACCESSION_NUMBER"] == accession_number].copy()
holdings["VALUE"] = pd.to_numeric(holdings["VALUE"], errors="coerce")
holdings["SSHPRNAMT"] = pd.to_numeric(holdings["SSHPRNAMT"], errors="coerce")

Notes

• VALUE in INFOTABLE is in thousands of USD
• TABLEVALUETOTAL in SUMMARYPAGE is also in thousands of USD
• TABLEENTRYTOTAL is the number of positions reported