A completed week, fixed in place. The live page covers the rolling last seven days.
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Over the past seven days, corporate insiders reported 186 open-market purchases across 53 companies, by 85 distinct insiders, for a combined $243.58M of stock bought with personal capital. That is up 91% on the $127.47M bought the week before.
The largest single purchase: EcoR1 Capital, LLC (Director) bought $37.40M of Aktis Oncology, Inc. (AKTS).
5 of this week's names saw cluster buying (two or more insiders in the same window): AKTS (6 insiders), SRZN (2 insiders), GLO (3 insiders), NEWT (4 insiders), ACRV (3 insiders). See all current clusters on the cluster page.
The figures on this page describe SEC Form 4 open-market purchases (transaction code P) reported between 2026-01-12 and 2026-01-18, and will not change. Grants, option exercises and shares withheld for tax are excluded: they are compensation mechanics rather than a decision to buy.