Retrieve standardized SEC EDGAR fundamental financial metrics for a US public company. Returns revenue, gross profit, operating income, net income, EPS (diluted), total assets, total liabilities, stockholders' equity, cash & equivalents, total debt, operating cash flow, and capital expenditures for one or more fiscal periods. Data sourced from 10-K (annual) and 10-Q (quarterly) filings. Point-in-time: no look-ahead bias — pass `as_of_date` (YYYY-MM-DD) to reconstruct exactly the information set known on that date. This returns the raw as-reported line items; for pipeline-computed ratios (margins, ROE, ROIC, leverage, per-share) use `get_financial_ratios`, and for margins combined with DCF/DDM model inputs use `get_valuation_metrics` — both derive from the figures this tool returns.