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S-1 Registration Statement: Parse SEC Filings with Python

S-1 filings are full registration statements required any time a company wants to offer securities to the public without the abbreviated incorporation-by-reference that S-3 shelves allow. EdgarTools parses S-1, S-1/A, F-1, and F-1/A filings into a RegistrationS1 object, automatically classifying the offering type and extracting the cover page, fee table, and key financial tables.

from edgar import find

filing = find("0001213900-26-015175")   # Solidion Technology S-1 (IPO)
s1 = filing.obj()                       # RegistrationS1
s1

S-1 registration statement parsed with Python edgartools showing cover page and fee table

You can also reach an S-1 through a company search:

from edgar import Company

company = Company("WOLF")                        # Wolfspeed
filing = company.get_filings(form="S-1")[0]
s1 = filing.obj()                                # RegistrationS1

Classify the Offering Type

The first thing most analysts want to know is whether the filing is an IPO, a SPAC, a resale registration, or something else. The offering_type property answers that.

s1.offering_type              # S1OfferingType.IPO
s1.offering_type.display_name # "Initial Public Offering"
Value Display Name Typical use
IPO Initial Public Offering First-time listing; no prior public float
SPAC SPAC IPO Blank check company; trust account language
RESALE Resale Registration Selling stockholders; company receives no proceeds
DEBT Debt Offering Debt securities only
FOLLOW_ON Follow-On Offering Secondary offering by already-public company
UNKNOWN Unknown Classification could not determine type 
# SPAC example
filing = find("0001213900-26-025801")   # BEST SPAC II
s1 = filing.obj()
s1.offering_type              # S1OfferingType.SPAC
s1.total_offering             # 129375000.0

# Resale example
filing = find("0001193125-26-098748")   # Wolfspeed resale registration
s1 = filing.obj()
s1.offering_type              # S1OfferingType.RESALE

Read the Cover Page

The cover page captures who is filing, how the SEC classifies them, and which registration rules apply. This is the filer's self-reported profile at the time of filing.

cp = s1.cover_page                          # S1CoverPage

cp.company_name                             # "SOLIDION TECHNOLOGY INC."
cp.registration_number                      # "333-293402"
cp.state_of_incorporation                   # "Delaware"
cp.sic_code                                 # "3359"
cp.ein                                      # "87-1993879"

# Filer category checkboxes
cp.is_large_accelerated_filer               # False
cp.is_non_accelerated_filer                 # True
cp.is_smaller_reporting_company             # True
cp.is_emerging_growth_company               # True

# Rule checkboxes
cp.is_rule_415                              # True if delayed/continuous offering
cp.is_rule_462b                             # True if Rule 462(b) amendment

# Extraction quality indicator
cp.confidence                               # "high", "medium", or "low"

Shortcut properties on the RegistrationS1 object delegate to the cover page:

s1.registration_number        # same as s1.cover_page.registration_number
s1.state_of_incorporation     # same as s1.cover_page.state_of_incorporation
s1.sic_code                   # same as s1.cover_page.sic_code
s1.ein                        # same as s1.cover_page.ein
s1.is_amendment               # True when form contains "/A"

The confidence score reflects how many fields were successfully extracted: "high" (4+ fields), "medium" (2-3 fields), "low" (0-1 fields). Older filings with non-standard layouts tend to score lower.

Read the Fee Table

Every S-1 filed since 2022 includes Exhibit 107 (EX-FILING FEES) stating the total offering size and the SEC fee owed. EdgarTools extracts this from the exhibit automatically.

s1.total_offering    # 14490000.0   (total registered amount in dollars)
s1.net_fee           # 2001.07      (SEC registration fee owed)

# Per-security breakdown
for sec in s1.securities:
    print(sec.security_type, sec.security_title, sec.max_aggregate_amount)

For more detail, access the fee table object directly:

ft = s1.fee_table                   # RegistrationFeeTable | None
ft.total_offering_amount            # 14490000.0
ft.net_fee_due                      # 2001.07
len(ft.securities)                  # 3 (one row per registered security class)

fee_table is None for filings before the 2022 rule change requiring Exhibit 107.

Access IPO-Specific Tables

For IPO registrations, the S-1 body includes dilution and capitalization tables that summarize the company's pre- and post-offering financial position.

# Dilution table — shows NAV per share before and after offering
dilution = s1.dilution              # DilutionData | None
if dilution:
    print(dilution.net_tangible_book_value_per_share_after_offering)

# Capitalization table — total equity before and after
cap = s1.capitalization             # CapitalizationData | None
if cap:
    print(cap.total_stockholders_equity_actual)
    print(cap.total_stockholders_equity_as_adjusted)

These are parsed lazily on first access and cached. They return None when the filing does not contain the relevant tables (common for resale and debt registrations).

Access Resale Registration Data

For resale registrations, the S-1 identifies the selling stockholders who will offer shares. The company typically receives no proceeds.

sellers = s1.selling_stockholders   # SellingStockholdersData | None
if sellers:
    for holder in sellers.holders:
        print(holder.name, holder.shares_offered)

Get Underwriting Information

When the offering includes a bank or broker-dealer acting as underwriter, the underwriting section names them.

uw = s1.underwriting                # UnderwritingInfo | None
if uw:
    for entry in uw.underwriters:
        print(entry.name)

Check Effectiveness and Navigate to Takedowns

After filing, the SEC reviews the S-1 and issues an EFFECT notice when it is declared effective. From that point forward the company can sell shares. If they file follow-on 424B prospectuses under the same registration number, you can reach those from the RegistrationS1 object.

s1.is_effective       # True / False
s1.effective_date     # "2024-08-15" (date of EFFECT filing) or None

# 424B takedowns under this registration
takedowns = s1.takedowns        # Filings | None
if takedowns:
    for filing in takedowns:
        print(filing.form, filing.filing_date)
        prospectus = filing.obj()   # Prospectus424B

To see every filing under the same registration file number (including the EFFECT notice and any amendments):

all_filings = s1.related_filings    # Filings | None

Both .takedowns and .related_filings require a network call and are cached after first access.

Get AI-Friendly Context

.to_context() returns a structured text summary suitable for language model prompts:

print(s1.to_context())
# S-1 REGISTRATION STATEMENT: SOLIDION TECHNOLOGY INC. (S-1)
#
# Filed: 2026-02-27
# Offering Type: Initial Public Offering
# Registration No.: 333-293402
# State: Delaware
# SIC Code: 3359
# ...

print(s1.to_context(detail='full'))     # includes available properties/actions
print(s1.to_context(detail='minimal'))  # filing header only

Supported Form Variants

Form Description
S-1 Full registration statement (domestic companies)
S-1/A Amendment to an S-1
F-1 Full registration statement (foreign private issuers)
F-1/A Amendment to an F-1

All four are dispatched automatically by filing.obj(). F-1 forms follow the same structure as S-1 but are filed by foreign private issuers. The RegistrationS1 class handles all four.

Quick Reference

RegistrationS1 Properties

Property Type Description
form str Form type ("S-1", "S-1/A", "F-1", "F-1/A")
company str Company name from filing metadata
filing_date date Date the filing was submitted
accession_number str SEC accession number
offering_type S1OfferingType Classification enum
cover_page S1CoverPage Extracted cover page fields
fee_table RegistrationFeeTable \| None Parsed Exhibit 107
total_offering float \| None Total registered offering amount in dollars
net_fee float \| None Net SEC registration fee owed
securities list Per-security rows from fee table
registration_number str \| None File number ("333-XXXXXX")
state_of_incorporation str \| None State of incorporation
sic_code str \| None SIC industry code
ein str \| None Employer identification number
is_amendment bool True when form contains /A
is_effective bool True when an EFFECT filing exists

RegistrationS1 Cached Properties

Property Type Description
dilution DilutionData \| None Dilution table (IPO registrations)
capitalization CapitalizationData \| None Capitalization table (IPO registrations)
selling_stockholders SellingStockholdersData \| None Selling stockholder table (resale registrations)
underwriting UnderwritingInfo \| None Underwriter list
takedowns Filings \| None 424B filings under this registration (network call)
related_filings Filings \| None All filings under this file number (network call)
effective_date str \| None Date of EFFECT filing (network call)

RegistrationS1 Methods

Method Returns Description
to_context(detail) str AI-formatted text ('minimal', 'standard', 'full')

S1CoverPage Fields

Property Type Description
company_name str Company name
registration_number str \| None SEC file number
state_of_incorporation str \| None State of incorporation
sic_code str \| None SIC code
ein str \| None EIN
is_large_accelerated_filer bool \| None Checkbox state
is_accelerated_filer bool \| None Checkbox state
is_non_accelerated_filer bool \| None Checkbox state
is_smaller_reporting_company bool \| None Checkbox state
is_emerging_growth_company bool \| None Checkbox state
is_rule_415 bool Delayed/continuous offering
is_rule_462b bool Rule 462(b) amendment
is_rule_462e bool Rule 462(e)
security_description str \| None Description of securities from cover text
confidence str Extraction confidence ("low", "medium", "high")

S1OfferingType Values

Enum Value display_name When
IPO Initial Public Offering No prior public float; first listing
SPAC SPAC IPO Blank check company; trust account language
RESALE Resale Registration Selling stockholders; company receives no proceeds
DEBT Debt Offering Debt securities only
FOLLOW_ON Follow-On Offering Already-public company issuing additional shares
UNKNOWN Unknown Classification failed

Things to Know

Unlike S-3 filings, S-1s contain complete financial statements rather than incorporating them by reference from prior 10-K/10-Q filings. This makes them significantly larger documents (often 200KB to several MB).

The dilution, capitalization, selling stockholders, and underwriting properties are all parsed lazily on first access. Each makes one pass through the filing's HTML to extract tables. For large filings this can take a few seconds.

fee_table is None for S-1 filings submitted before the November 2022 rule change that required Exhibit 107. Older filings need the fee amount extracted from the cover page text, which the current extractor does not attempt.

The confidence field on cover_page reflects how many structured fields were found. A score of "low" does not mean the filing is invalid; it means the cover page HTML used a non-standard layout that the extractor could not fully parse.

Foreign private issuer F-1 filings use different country-of-incorporation conventions. The state_of_incorporation field may contain a full country name (e.g., "British Virgin Islands") rather than a US state.