SEC Filing Types
Every public company must file documents with the SEC on a regular schedule. Understanding what each filing is and when it appears tells you where to look — and what to look for — at each stage of a company's life.
Regular Reports
Every public company must file these on a fixed schedule. They are the primary source of financial data — revenue, earnings, cash flow, and management commentary.
Filed annually after fiscal year end
60 days (large companies) or 90 days after year end
Contains
Full audited financials for the year: income statement, balance sheet, cash flow. Auditor sign-off. Business description, risk factors, and management's discussion of what happened and why.
What to look for
Revenue and profit trends year over year. Whether auditors flagged anything unusual. How management explains a bad year — are they honest or making excuses? Risk factors that are genuinely new vs. boilerplate.
Filed after each of the first three fiscal quarters
40 days after quarter end (large companies)
Contains
Unaudited quarterly financials. Year-to-date comparisons. Management's commentary on the quarter. Any material changes since the last 10-K.
What to look for
Whether the quarter is tracking toward or away from full-year expectations. Changes in gross margin quarter over quarter. Any new risks or litigation mentioned.
Any material event (earnings, M&A, leadership change, etc.)
Within 4 business days of the event
Contains
A brief disclosure of a specific event: earnings results, an acquisition, a CEO departure, a debt issuance, a regulatory action, or any other development the SEC deems material.
What to look for
CEO/CFO departures are often the most revealing. Debt issuances tell you whether the company is funding growth or patching problems. Acquisitions — what are they paying and why?
Insider & Ownership
Filed by directors, executives, and large shareholders. Insider buying is one of the few reliable signals in investing — insiders only buy when they think the stock is cheap.
When an executive, director, or 10%+ shareholder first becomes an insider
Within 10 days of becoming an insider
Contains
Initial statement of how many shares the insider owns at the time they join.
What to look for
How much skin in the game does the new CEO or director actually have? A large initial stake aligns incentives.
Any time an insider buys or sells shares
Within 2 business days of the transaction
Contains
Exactly how many shares were bought or sold, at what price, and whether it was a direct purchase or exercise of options.
What to look for
Insider buying with personal cash (not option exercises) is the strongest signal — executives are spending their own money because they believe in the stock. Cluster buying (multiple insiders buying in the same window) is even more significant. Selling is harder to interpret — could be diversification or could be a warning.
Any investor acquires more than 5% of a company with active intent
Within 10 days of crossing the 5% threshold
Contains
Who owns the stake, why they bought it, and what they plan to do — which could include pushing for a sale, board changes, or a spin-off.
What to look for
The 'purpose of transaction' section. Activist investors file 13Ds, and their stated intentions often drive the stock. Are they pushing for a buyback, a sale, or a management change?
Any passive investor acquires more than 5%
Within 45 days of year end (or 10 days if crossing 10%)
Contains
Who owns more than 5%, but filed passively — no stated intent to influence the company.
What to look for
Large institutional holders (index funds, mutual funds) filing 13Gs. The composition of a company's major shareholders shapes governance even without activism.
Institutional Holdings
Large investment managers must report their entire portfolio quarterly. This reveals what the smartest money is buying and selling — with a 45-day lag.
Quarterly requirement for institutional managers with >$100M under management
45 days after quarter end
Contains
Every long equity position held by the fund: stock name, shares held, and market value. Does not include short positions or non-US securities.
What to look for
What Berkshire Hathaway, large hedge funds, or concentrated value investors are buying. New positions are most interesting — they represent a fresh conviction bet. Position sizing matters: a 0.1% position is noise; a 5% position is conviction.
Registration & IPO
Filed before a company goes public or issues new shares. These contain historical financial data and the company's own description of its business and risks.
Filed when a company intends to go public (IPO)
Before the IPO — typically filed weeks to months in advance
Contains
The company's full business description, several years of historical financials, risk factors, how they plan to use IPO proceeds, and the management team's background. This is the most detailed document a company ever files.
What to look for
Historical revenue growth and whether the business was profitable before going public. How they plan to use proceeds — R&D and growth is good; 'repay existing debt' or 'pay existing investors' is a yellow flag. Risk factors that are genuinely unusual, not boilerplate. How insiders are compensated.
The final prospectus — filed on IPO day
Same day as pricing
Contains
The final version of the S-1 with the actual IPO price and share count filled in. Legally binding version that investors receive.
What to look for
The final price vs. the initial filing range tells you whether demand was strong (priced above range) or weak (priced below). Underwriter list — tier-1 banks (Goldman, Morgan Stanley) doing IPOs tend to do more rigorous due diligence.
Amendment to an S-1, often filed multiple times before going public
Filed in response to SEC comments or to update information
Contains
Updated financials, revised risk factors, responses to SEC examiner questions. Each amendment can narrow the price range as demand becomes clearer.
What to look for
How many amendments were filed — many rounds of SEC comments can signal issues with the disclosure. Watch whether revenue or profit figures change between amendments.
Proxy & Governance
Filed before the annual shareholder meeting. Covers executive pay, board composition, and shareholder votes. Often ignored — but this is where corporate governance lives.
Filed before the annual shareholder meeting
At least 40 days before the meeting
Contains
Exact compensation for each named executive (salary, bonus, stock awards, options, perks). Board director backgrounds and independence. All proposals shareholders will vote on. Related-party transactions — business dealings between the company and its insiders.
What to look for
CEO pay vs. company performance — are they paying for results or paying regardless? Related-party transactions are the biggest governance red flag: is the CEO paying rent to a property owned by the company, or sending business to a firm a board member runs? Pay attention to the ratio of base salary to performance-linked pay.
Additional proxy materials after the original DEF 14A
Filed as needed
Contains
Supplemental materials: investor presentations, letters to shareholders, or responses to activist campaigns.
What to look for
If filed in response to an activist, it signals a proxy fight — management trying to convince shareholders to vote with them over an activist investor pushing for change.
Amendments & Late Filings
Companies sometimes correct past filings or request extensions. These are worth noting — frequent amendments or late filings are a governance signal.
Filed to correct or restate a prior annual or quarterly report
As soon as the error is discovered
Contains
A corrected version of the original filing, with changes marked. Can be minor (a typo, a classification error) or major (a full earnings restatement).
What to look for
The reason for the restatement. Revenue or profit restatements that are material in size are serious red flags — they mean the numbers investors relied on were wrong. Check if the CFO or auditor changed around the same time.
Filed when a company cannot meet the filing deadline
Filed on or before the original deadline, requesting a 15-day extension
Contains
Notice that the company needs more time to file. Usually includes a brief reason.
What to look for
Occasional late filings happen. Repeated NT filings or vague explanations ('we need more time to compile information') can signal accounting problems, auditor disagreements, or internal control issues.