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.

Built from public SEC EDGAR filings — every name traces to a Form 4.

Aug 3–9

2026-W31

SPAC cluster leads quiet insider week

EWAV drew a five-insider cluster this week, though no dollar volume was reported; the activity included a 10% owner.

8 names

Jul 27 – Aug 2

2026-W30

Biotech cluster leads insider buying week

SCTX dominated with a 6-insider cluster purchasing $71.3M, signaling coordinated confidence in the therapeutics play.

24 names

Jul 20–26

Quiet week — nothing met the bar.

Jul 13–19

Quiet week — nothing met the bar.

Jul 6–12

2026-W27

TSM's 31-insider cluster dominates quiet week

Taiwan Semiconductor Manufacturing saw a remarkable 31-insider buying cluster totaling $122.6M, the week's most significant coordinated activity.

16 names

Jun 29 – Jul 5

2026-W26

SPG leads broad insider buying week

Simon Property Group (SPG) dominated with an 11-insider cluster purchasing $533K, signaling coordinated confidence in the REIT.

29 names

Jun 22–28

2026-W25

DPC and KARD lead insider buying surge

DPC Holdings drew six insiders buying $51.6M in stock, while Kardigan's 10% owner led a three-person cluster spending $90M—the week's two largest transactions.

37 names

Jun 15–21

2026-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 8–14

2026-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.