SEC Filing Types Explained

Understanding SEC filing types is essential for any serious investor. Each form type serves a different purpose and contains unique information that can impact investment decisions. Use this glossary to learn what each filing type contains and why it matters.

10-K

Annual report filed by public companies with comprehensive financial statements, management discussion, and risk factors.

10-Q

Quarterly report with unaudited financial statements and updates on company operations and financial condition.

8-K

Current report disclosing material events — CEO changes, acquisitions, earnings, bankruptcy, and other market-moving news.

S-1

Registration statement for initial public offerings (IPOs) and other first-time securities registrations.

DEF 14A

Definitive proxy statement with executive compensation, board nominees, and shareholder voting proposals.

Form 3

Initial statement of beneficial ownership filed when someone first becomes an officer, director, or 10% owner — the baseline before any Form 4 trades.

Form 4

Insider transaction report filed within two days of an officer, director, or 10% owner buying or selling shares.

Form 144

Notice of proposed sale of securities filed by insiders before selling restricted or control shares. A forward-looking signal that precedes Form 4 disclosures.

SC 13D / 13G

Beneficial ownership reports filed when an investor acquires more than 5% of a company's shares.

Form 13F

Quarterly holdings report from institutional investment managers with $100M+ in assets, listing every reportable position.

F-1

Registration statement a foreign private issuer files for its first US public offering. The foreign version of the S-1 and the start of most ADR IPOs.

S-3

Short-form shelf registration that lets a seasoned public company register securities now and sell them later, an early sign of dilution or insider resale.

6-K

Report of a foreign private issuer covering interim results, press releases, dividends, and material agreements. The foreign counterpart of the 8-K and 10-Q.

RW

Request to withdraw a registration statement before it goes effective. The formal record of a pulled IPO, shelf, or other planned offering.

EFFECT

SEC notice that a registration statement has been declared effective, the moment an issuer is legally cleared to sell the registered securities.

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