insider-radar

A lookup tool for SEC Form 4 filings, which report stock trades by company officers, directors, and major shareholders, and 13F filings, which report changes in large funds’ stock holdings.

In plain words
What is it for?
Use it to check insider buying or selling for a stock, review institutional ownership changes, or sweep a watchlist over a chosen time period.
Why use it?
It brings insider and institutional ownership changes into one review and helps separate potentially meaningful purchases from routine or scheduled sales.

Skill for Claude CodeCodex

Part of the alphai plugin — 5 skills, 1 MCP server shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/ccplugins/awesome-claude-code-plugins/insider-radar
Any agent
npx skills add ccplugins/awesome-claude-code-plugins --skill insider-radar
Clone the repo
git clone --depth 1 https://github.com/ccplugins/awesome-claude-code-plugins

Made for: Claude Code, Codex.

Or install alphai, the plugin that ships this one along with the rest of its 5 skills, 1 MCP server.

Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 555 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00074 $0.00555
Opus 5 $0.00037 $0.00278
Sonnet 5 $0.00015 $0.00111
Haiku 4.5 $0.00007 $0.00056

Measured 3d ago against content hash fd84f2762296, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

insider-radar scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/alphai/skills/insider-radar/SKILL.md · 45 lines

What it actually says

Insider radar

Surface ownership-change signal: SEC Form 4 trades (officers, directors, 10% owners trading their own stock) and 13F moves (funds and foundations adjusting stakes). AlphaAI templates each filing into a relevance-scored news row, so the read-across is already done.

Steps

  1. Single ticker. Call alphai_insider_news(ticker="<SYM>"). If the user wants only the strongest signal, raise the floor with min_relevance=8.
  2. Watchlist. Call alphai_insider_news(ticker=...) once per name. If the user gave none, call alphai_insider_news() unfiltered for the broad tape.
  3. Time-box on request. For "this week" / "since earnings", pass from_date (ISO, UTC). Paginate with cursor only if they ask for more.
  4. Distinguish buys from sells. Open-market purchases by insiders are the higher-signal event; routine 10b5-1 scheduled sales and option-exercise sales are noise more often than not. Call that out — don't treat every sale as bearish.

Output

  • Notable buys — insider purchases first: ticker · who/role · size if given · relevance. These are what most users actually want.
  • Notable sells — flag whether each looks like a discretionary sale vs a scheduled/10b5-1 or option-related sale, where the feed says.
  • Institutional (13F) — any fund stake increases/trims worth a mention.
  • Read — one line: is the cluster leaning accumulation or distribution, or is it just routine?

Guardrails

  • An insider sale is not automatically bearish (taxes, diversification, scheduled plans). Say what the filing shows; don't over-read it.
  • One filing can span several tranches sharing a row — report the event, not a count of line items.
  • Lead with relevance_score; "no notable insider activity in the window" is a valid, useful answer.
  • News, not advice.
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 45 lines · 74 tokens per session scan A fd84f2762296

Subscribe to this mod's changes

insider-radar is a skill published in the GitHub repository ccplugins/awesome-claude-code-plugins (929 stars, last pushed 21d ago), licensed Apache-2.0. It adds 74 tokens to every session and 555 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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