Simulator: what following the filings would have done

A replay of one rule on the past: buy every disclosed insider purchase that fits, at the close of the day it was filed (nobody can act before a filing is public), hold a fixed number of days, sell at the close. Equal stakes, a round-trip cost, the S&P 500 over the same days as the yardstick. A replay is not a forecast, and nothing here is a recommendation.

Purchase of at least$25K $100K $250K $1M

byofficers and directors any filer

hold30 days 90 days 180 days

filed in the last6 months 12 months 24 months

costs0.1% each way none

Buying every open-market insider purchase of at least $100K by an officer or director filed in the last 12 months, at the close of the filing day, and holding 90 days: 1,760 purchases at 540 companies have matured. 36% beat the S&P 500 over the same days; the median result is −3.6% (−7.1% against the index). $1,000 in each became $1.71M after costs, against $1.83M in the S&P 500. 692 more fit the rule but have not reached 90 days yet.

Purchases replayed: 1,760; 540 companies
Beat the S&P 500: 36%; 44% ended above the entry
Median after 90 days: −3.6%; −7.1% vs the index
$1,000 in each became: $1.71M; S&P 500: $1.83M (mean −2.6% vs +3.9%)

Median result against the S&P 500, by month filed

Oct 25+1.00%
Nov 25−8.80%

How this is built

The rule. Open-market purchases (transaction code P) reported on SEC Form 4, with the value as filed (price times shares), from Oct 20, 2025. The entry is the adjusted close of the filing day, the exit the adjusted close 90 calendar days later (the next trading day when markets were closed); the S&P 500 is measured over the same two dates. Costs: 0.1% at entry and 0.1% at exit. Each purchase is one equal stake; the same insider buying twice is two stakes. Results come from the nightly computation behind the track records; a purchase appears once its 90 days have passed.

Caveats. Past filings, past prices: nothing here says what the next purchase will do. The replay ignores dividends, taxes, liquidity and whether the stock could be bought at the close. Survivorship: a company that was delisted after a purchase keeps its last close. Congress purchases are replayed on the Congress Index page and per member on the leaderboard. Not investment advice.

Simulator: what following the filings would have done

How this is built

Simulator: what following the filings would have done

Simulator: what following the filings would have done

Did best against the index

Did worst against the index