Weekly

Insider buying, week by week

The most notable insider buying disclosed in SEC filings each week — cluster buys, large purchases, and catalyst-backed names. Pick a week to read the full breakdown.

Bucketed by the week each Form 4 was filed. Not investment advice — SEC data is public.

Jun 15–212026-W24

Pharma cluster leads modest insider week

PCSA drew a cluster of 5 insiders buying $24.7K, while XRAY and GABC each saw 4-person clusters with stronger dollar volumes ($416K and $4K respectively).

44 names

Jun 8–142026-W23

Summit's $100M insider buy dominates quiet week

Summit Therapeutics (SMMT) drew the week's headline with a single $99.97M insider purchase tied to a material 8-K filing, dwarfing all other activity.

49 names

Jun 1–72026-W22

Biotech and Defense Lead Insider Buying Week

SMMT (Summit Therapeutics) led the week with $3.6M in insider buying across 3 buyers, including a 10% owner, paired with a material 8-K filing.

52 names

May 25–312026-W21

Small-cap clusters dominate modest week

UBCP led with an 8-insider cluster totaling $185,864, while OTLK saw four insiders buy $243,631 following an 8-K filing.

51 names

May 18–242026-W20

Digital Infrastructure and Food Retail Drive Active Week

BXDC led the week with 8 insiders deploying $191.2M following an 8-K catalyst, signaling confidence from a 10% stakeholder.

91 names

Mar 2–82026-W09

Biotech Dominates Week with Two Mega-Buys

GENB led the week with a striking $150M insider cluster of four buyers including a 10% owner, while fellow biotech LRMR saw four insiders deploy $25.5M in a similar pattern.

43 names

Feb 23 – Mar 12026-W08

BDC and PE platforms lead insider buying week

HCXY drew an 8-insider cluster totaling $1.4M, while HLNE saw a concentrated 5-insider group (including a 10% owner) buy $4.2M combined—both signaling notable confidence from multiple decision-makers.

62 names

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