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

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

221,597

$8.5M

SEC filings
2APLM

Apollomics Inc.

3 officers/directors

Cluster buy

Chen Yi-Kuei, LIN PETER KUAN-HOW, Chen Hung-Wen

583,334

$8.3M

SEC filings
3GWRS

Global Water Resources, Inc.

2 officers/directors

Cluster buy

Levine Jonathan L, Cohn Andrew M.

790,961

$7.0M

SEC filings
4ONON

On Holding AG

2 officers/directors

Cluster buy

Bernhard Olivier, Coppetti Caspar Felix

130,000

$4.0M

SEC filings
5ANGX

Angel Studios, Inc.

3 officers/directors

Cluster buy

Harmon Neal, Harmon Jeffrey, Sarowitz Steven I

317,195

$1.3M

SEC filings
6MLAB

MESA LABORATORIES INC /CO/

2 officers/directors

Cluster buy

Kadia Siddhartha, Tripeny R Tony

7,993

$902K

SEC filings
7REZI

RESIDEO TECHNOLOGIES, INC.

3 officers/directors

Cluster buy

Mehta Amit Ashvin, Foster Joshua Peter, SURRAN THOMAS A

41,245

$848K

SEC filings
8REFI

Chicago Atlantic Real Estate Finance, Inc.

2 officers/directors

Cluster buy

Mazarakis John, Cappell Anthony

70,000

$725K

SEC filings
9INV

Innventure, Inc.

2 officers/directors

Cluster buy

Otworth Michael, Donnally James O

456,000

$687K

SEC filings
10DKL

Delek Logistics Partners, LP

3 officers/directors

Cluster buy

Soreq Avigal, Hobbs Mark Wayne, Yemin Ezra Uzi

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.