Top insider buys: Aug 17 – Aug 23, 2026

The largest open-market purchases company insiders reported on SEC Form 4 between Aug 17 – Aug 23, 2026.

Week 34, 2026

#CompanyWho boughtSharesValueSource
1CDNL

Cardinal Infrastructure Group Inc.

7 officers/directors

Cluster buy

Richard Bennett Wimmer, Richard Melvin Lee Jr., Michael Bruce Rowe Jr., Anthony Leon Wood Jr., Jeremy Simmons Spivey, Ivy Zelman, Benjamin Wood

221,597

$8.5M

SEC filings
2APLM

Apollomics Inc.

3 officers/directors

Cluster buy

Yi-Kuei Chen, Peter Kuan-How Lin, Hung-Wen Chen

583,334

$8.3M

SEC filings
3GWRS

Global Water Resources, Inc.

2 officers/directors

Cluster buy

Jonathan L. Levine, Andrew M. Cohn

790,961

$7.0M

SEC filings
4ONON

On Holding AG

2 officers/directors

Cluster buy

Olivier Bernhard, Caspar Felix Coppetti

130,000

$4.0M

SEC filings
5ANGX

Angel Studios, Inc.

3 officers/directors

Cluster buy

Neal Harmon, Jeffrey Harmon, Steven I. Sarowitz

317,195

$1.3M

SEC filings
6MLAB

MESA LABORATORIES INC /CO/

2 officers/directors

Cluster buy

Siddhartha Kadia, R. Tony Tripeny

7,993

$902K

SEC filings
7REZI

RESIDEO TECHNOLOGIES, INC.

3 officers/directors

Cluster buy

Amit Ashvin Mehta, Joshua Peter Foster, Thomas A. Surran

41,245

$848K

SEC filings
8REFI

Chicago Atlantic Real Estate Finance, Inc.

2 officers/directors

Cluster buy

John Mazarakis, Anthony Cappell

70,000

$725K

SEC filings
9INV

Innventure, Inc.

2 officers/directors

Cluster buy

Michael Otworth, James O. Donnally

456,000

$687K

SEC filings
10DKL

Delek Logistics Partners, LP

3 officers/directors

Cluster buy

Avigal Soreq, Mark Wayne Hobbs, Ezra Uzi Yemin

12,500

$625K

SEC filings

Source: SEC Form 4 filings, aggregated per company over the week. Open-market purchases of $100K or more only; grants, awards, option exercises and likely IPO or offering allocations are excluded. Cluster buys (two or more officers or directors buying) rank first, then by dollar value.

Not investment advice. This page reports public SEC data and is not a recommendation to buy or sell any security.