DOSSIER · 13F-HR · Q1 2026

ECP ControlCo, LLC

$6.3B in tracked AUM across 4 positions as of Q1 2026.

EC
CIK 0001707921 · last filed Mar 31, 2026
Total AUM
$6.3B
as of Q1 2026
Holdings
4
positions
Whale Score
83
83
strong
Activity
no data
changes this Q
AI Analysis · Q1 2026

Portfolio Overview

ECP ControlCo, LLC presents a highly concentrated investment portfolio characterized by a low number of holdings and significant conviction in specific assets. As of the reporting period ending September 30, 2025, the firm managed total assets of approximately $152.76 million across a mere two positions. This structure indicates a "high-conviction" strategy, where capital is allocated to a narrow set of ideas rather than broad diversification. The portfolio experienced po...

Key Holdings

The portfolio is dominated by PCG (PG&E Corp), which constitutes the overwhelming majority of the portfolio at 70.33%, or approximately $107.44 million. The position consists of 7.12 million shares. This massive weighting indicates that the firm views PCG as a core holding, likely focusing on the utility's recovery trajectory, regulatory environment, or infrastructure stability. Given the size of the stake relative to the total portfolio, PCG is the primary driver of performance.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
CEG
CONSTELLATION ENERGY CORP
$6.2B22.0M97.1%
02
PCG
PG&E CORP
$125M7.1M2.0%
03
SHEN
SHENANDOAH TELECOMMUNICATION
$53M3.5M0.8%
04
CLNE
CLEAN ENERGY FUELS CORP
$6M2.6M0.1%

Filing history

2026Q1Mar 31
$6.3B 2994.4%
4 positionsView →
2025Q4Dec 31
$205M 0.2%
4 positionsView →
2025Q3Sep 30
$205M 15.1%
4 positionsView →
2025Q2Jun 30
$178M 10.8%
4 positionsLocked
2025Q1Mar 31
$200M 22.9%
4 positionsLocked
2024Q4Dec 31
$260M 21.0%
4 positionsLocked
2024Q3Sep 30
$329M 1.5%
6 positionsLocked
2024Q2Jun 30
$324M 10.7%
7 positionsLocked
2024Q1Mar 31
$363M 21.3%
7 positionsLocked
2023Q4Dec 31
$461M 5.6%
8 positionsLocked
2023Q3Sep 30
$436M 12.1%
9 positionsLocked
2023Q2Jun 30
$496M 0.6%
9 positionsLocked
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