ECP ControlCo, LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

Stocks Covered

Latest Filing

Jan 14, 2026

Filings

Constellation Energy Corp

SC 13G · Jan 14, 2026

6.1%

22.0M shares

Custom Truck One Source, Inc.

SC 13D/A · Dec 10, 2024

8.7%

20.3M shares

Custom Truck One Source, Inc.

SC 13D/A · Sep 9, 2024

9.9%

23.4M shares

Shenandoah Telecommunications Company

SC 13D/A · Aug 1, 2024

10.0%

5.8M shares

Shenandoah Telecommunications Company

SC 13D · Apr 8, 2024

9.9%

5.8M shares

Sunlight Financial Holdings Inc.

SC 13G · Feb 10, 2023

5.1%

4.2M shares

N/A

Fast Radius, Inc.

SC 13D · Mar 9, 2022

19.8%

15.6M shares