How many insider purchases were disclosed in August 2026?

745 open-market insider purchases of $50K or more were disclosed across 357 companies by 491 distinct insiders in SEC Form 4 filings during August 2026, totaling $2.0B.

What was the biggest insider buy in August 2026?

The largest open-market insider purchase disclosed in August 2026 was $324.0M by SUMITOMO MITSUI FINANCIAL GROUP, INC. at Jefferies Financial Group Inc. (JEF), filed with the SEC on Form 4.

Biggest Insider Buys: August 2026

The largest open-market insider purchases disclosed in SEC Form 4 filings, ranked by dollar value.

In August 2026, 745 open-market insider purchases of $50K or more were disclosed across 357 companies in SEC Form 4 filings, totaling $2.0B. The largest single purchase was $324.0M by SUMITOMO MITSUI FINANCIAL GROUP, INC. at Jefferies Financial Group Inc. (JEF).

← All monthly rankings

Largest purchases · August 2026

							Source
JEF	SUMITOMO MITSUI FINANCIAL GROUP, INC.	Director	Purchase	5,906,542	$324.0M	Aug 21	SEC ↗
MAIR	BERTARELLI ERNESTO	10% Owner	Purchase	8,770,524	$219.0M	Aug 27	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	301,639	$67.2M	Aug 26	SEC ↗
BRVE	Forbion Growth Opportunities Fund III Cooperatief U.A.	10% Owner	Purchase	3,600,000	$64.8M	Aug 7	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	284,600	$62.5M	Aug 28	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	275,500	$61.0M	Aug 28	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	269,477	$59.8M	Aug 26	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	261,664	$56.2M	Aug 12	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	240,000	$51.9M	Aug 12	SEC ↗
MLPT	Catalyst4, Inc.	10% Owner	Purchase	4,400,000	$50.1M	Aug 18	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	208,925	$46.0M	Aug 24	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	206,800	$44.4M	Aug 18	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	200,125	$43.6M	Aug 20	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	191,361	$42.2M	Aug 24	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	188,460	$40.7M	Aug 14	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	178,844	$39.8M	Aug 20	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	174,500	$37.7M	Aug 14	SEC ↗
BRVE	ORBIMED ADVISORS LLC	Director, 10% Owner	Purchase	1,940,000	$34.9M	Aug 11	SEC ↗
RSG	CASCADE INVESTMENT, L.L.C.	10% Owner	Purchase	149,250	$32.2M	Aug 18	SEC ↗
CCD	MetLife Investment Management, LLC	10% Owner	Purchase	880,000	$22.0M	Aug 26	SEC ↗
BRVE	AH Bio Fund IV, L.P.	10% Owner	Purchase	1,100,000	$19.8M	Aug 11	SEC ↗
ZNTL	WALTERS GROUP	10% Owner	Purchase	4,335,000	$15.2M	Aug 19	SEC ↗
ET	WARREN KELCY L	Director	Purchase	647,968	$13.8M	Aug 20	SEC ↗
PNAQ	Hudson Steven Kenneth	Chief Executive Officer	Purchase	1,250,000	$12.5M	Aug 12	SEC ↗
CHW	MetLife Investment Management, LLC	10% Owner	Purchase	440,000	$11.0M	Aug 26	SEC ↗

Showing 1–25 of 25

1 / 1