activist_filings
Schedule 13D activist filings (initial + amendments). Returns filer name, ownership pct, and Item 4 'Purpose of Transaction' excerpt when parseable.
How to use it
activist_filings is exposed by the OpenInsider MCP MCP server. Add the server to your MCP client (Claude Desktop, Cursor, Windsurf and others), and the activist_filings tool becomes available to the model automatically. See the full listing for setup details and every tool this server provides.
Install OpenInsider MCP
claude mcp add openinsider -- npx -y openinsider-mcpOther tools in OpenInsider MCP (27)
string
Companies where multiple insiders bought stock in a short window. The strongest open-market signal on OpenInsider.
FINRA Reg SHO daily short-sale volume — daily flow (not standing position; for that, use shortinterest). Aggregated across CNMS, FNRA, FNYX, FNQC venues. Returns {date, shortVolume, totalVolume, shortRatio}[].
int
S-3 shelf registrations and 424B5 takedowns, with parsed shelf amount and use-of-proceeds excerpt.
boolean
SEC failures-to-deliver per bi-monthly period plus current Reg SHO threshold-list flag (>10K shares + >0.5% of TSO failed for 5 consecutive settlement days). Returns {date, ftdShares, ftdValue, onThresholdList}[].
Live stock quote for a ticker — price, previous close, 52-week range, today's volume + 3-month average volume, market cap, beta, trailing/forward P/E, dividend yield, ex-dividend date, next earnings date, currency, exchange, ISO timestamp.
bool (optional)
string
string[] (optional)
NT-10K / NT-10Q late filing notices, with parsed reason text and a heuristic category (accounting / corporate / multiple / unspecified). Accounting reasons are the strongest bearish variant.
Most recent insider filings across the whole market — the live firehose.
int
Recent purchases of ≥$25k by company officers (CEO, CFO, COO, etc.). Filters out 10%-owner buys, which are often institutional and lower-signal.
"day" \
int (optional)
Recent 8-K material event filings for a ticker, with parsed item codes (e.g. 1.02 contract terminated, 4.02 restatement, 5.02 officer change, 2.06 impairment).
Generic OpenInsider screener with flexible filters. Use this when none of the named tools fit.
All trades by a specific insider across all companies, identified by their SEC CIK.
All insider trades for one company.
FINRA bi-monthly short interest snapshots with delta vs prior period. Returns ShortSnapshot[].
string
Largest insider purchases by dollar value over a fixed window.
Largest insider sales by dollar value over a fixed window. Same period argument as topbuys.
"all" \
Array<"P"\