EC
ECP ControlCo, LLC Investment Portfolio (Q2 2026) — 13F Stock Holdings
ECP ControlCo, LLCCIK: 0001707921
Concentrated strategySector-focusedContrarian
Total reported value
$4.7B
Reporting period: 2026-06-30 · Number of holdings: 5
ECP ControlCo, LLC disclosed 5 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $4.7B and a quarterly turnover rate of 63.9%.
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Personality snowflake
- Concentration
- 100
- Portfolio Stability
- 63.88
- Momentum
- 0
- Sector conviction
- 100
- Diversification
- 10
- Sizing Uniformity
- 83.72
ECP ControlCo, LLC's disclosed holdings carry a Herfindahl concentration index of 0.624 — mathematically equivalent to about 2 equally-sized positions, well below its 5 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.63), with a handful of outsized bets alongside many smaller positions.
Recent activity leans toward initiating meaningfully larger new positions than it adds to existing ones (a 19.8 percentage-point tilt) — a pattern consistent with a more contrarian, new-idea-driven approach.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govTrim CEG
-34.8% -$2.6B
New buy TLN
Add PCG
0.0% -$5.3M
Add SHEN
0.0% -$1.2M
Add CLNE
0.0% -$1.1M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | CEG | Constellation Energy | Stock-Utilities | 76.45% | -20.63% | -34.81% | |
| 2 | TLN | Talen Energy CORP | Stock-Utilities | 19.75% | +19.75% | NEW | |
| 3 | PCG | P G & E CORP | Stock-Utilities | 2.57% | +0.60% | — | |
| 4 | SHEN | Shenandoah Telecommunication | Stock-Other | 1.12% | +0.28% | — | |
| 5 | CLNE | Clean Energy Fuels CORP | Stock-Other | 0.11% | +0.01% | — |
Portfolio Performance
Performance for Q3 2026
-3.7%
Performance Last 4 Quarters
+0.6%
- Stdev
- +27.2%
- Beta
- +0.36
- Alpha
- -12.6%
- Max Drawdown
- -31.1%
- Annualized Perf
- -8.4%
- Batting Avg vs S&P
- +36.1%
- Sortino
- -0.29
- Stutzer
- -0.06
- Treynor
- -0.15
- Sterling
- -0.27
- Calmar
- -0.27
- Information Ratio
- -0.9
- Tracking Error
- +28%
- Stdev Down
- +18.1%
- Winning Months %
- +41.7%
- Losing Months %
- +58.3%
- Best 12 Months
- +8.7%
- Worst 12 Months
- -30.3%
- Efficiency Ratio
- +0.1
- Sharpe
- -0.19
- Stdev Sectors
- 0%
- Skewness
- +0.66
- Kurtosis
- +0.23
- Upside Potential
- +1.95
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 5 | $4.7B | 64 | ||
| 2026 Q1 | 4 | $6.3B | 100 | ||
| 2025 Q4 | 4 | $204.9M | 7 | ||
| 2025 Q3 | 4 | $205.2M | 100 | ||
| 2025 Q2 | 1 | $36.9M | 100 | ||
| 2025 Q1 | 4 | $200.0M | 100 | ||
| 2024 Q4 | 4 | $259.6M | 0 | ||
| 2024 Q3 | 6 | $328.6M | 0 | ||
| 2024 Q2 | 7 | $323.8M | 0 | ||
| 2024 Q1 | 7 | $362.7M | 0 | ||
| 2023 Q4 | 8 | $460.6M | 0 | ||
| 2023 Q3 | 9 | $436.2M | 0 | ||
| 2023 Q2 | 9 | $496.3M | 0 | ||
| 2023 Q1 | 8 | $499.4M | 0 | ||
| 2022 Q4 | 6 | $456.0M | 0 | ||
| 2022 Q3 | 7 | $441.6M | 0 | ||
| 2022 Q2 | 6 | $386.9M | 0 | ||
| 2022 Q1 | 6 | $537.1M | 0 | ||
| 2021 Q4 | 6 | $6.2B | 0 | ||
| 2021 Q3 | 6 | $998.1M | 0 | ||
| 2021 Q2 | 4 | $1.0B | 100 | ||
| 2021 Q1 | 5 | $1.0B | 40 | ||
| 2020 Q4 | 6 | $1.3B | 100 | ||
| 2020 Q3 | 4 | $991.0M | 0 | ||
| 2020 Q2 | 3 | $770.2M | 100 | ||
| 2020 Q1 | 4 | $486.2M | 0 | ||
| 2019 Q4 | 3 | $554.0M | 11 | ||
| 2019 Q3 | 3 | $587.3M | 100 | ||
| 2019 Q2 | 1 | $30.0M | 9 | ||
| 2019 Q1 | 1 | $32.7M | 16 | ||
| 2018 Q4 | 1 | $27.9M | 40 | ||
| 2018 Q3 | 1 | $42.0M | 7 | ||
| 2018 Q2 | 1 | $39.2M | 100 | ||
| 2018 Q1 | 2 | $233.7M | 79 | ||
| 2017 Q4 | 3 | $535.1M | 9 | ||
| 2017 Q3 | 3 | $486.8M | 0 |
Holding changes this quarter
ECP ControlCo, LLC's most significant position changes for 2026-06-30: New buy: Talen Energy CORP (TLN); Trim: Constellation Energy (CEG) — shares -34.81%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | TLN | Talen Energy CORP | +19.8% | NEW | New buy |
| 2 | PCG | P G & E CORP | +0.6% | — | Unchanged |
| 3 | SHEN | Shenandoah Telecommunication | +0.3% | — | Unchanged |
| 4 | CLNE | Clean Energy Fuels CORP | 0% | — | Unchanged |
| 5 | CEG | Constellation Energy | -20.6% | -34.81% | Trim |
Filing History
FAQ
What is ECP ControlCo, LLC and what type of investor is it?
ECP ControlCo, LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $4.7B, spread across 5 disclosed positions.
What are ECP ControlCo, LLC's largest equity positions?
Based on the latest 13F filing, ECP ControlCo, LLC's top holdings by market value are:
1. Constellation Energy (CEG) — $3.6B (76.5%)
2. Talen Energy CORP (TLN) — $922.2M (19.8%)
3. P G & E CORP (PCG) — $119.8M (2.6%)
4. Shenandoah Telecommunication (SHEN) — $52.1M (1.1%)
5. Clean Energy Fuels CORP (CLNE) — $5.3M (0.1%)
What changes did ECP ControlCo, LLC make in its most recent portfolio filing?
In the latest reported quarter, ECP ControlCo, LLC made 2 notable position adjustments: 1 new positions were initiated, 0 existing holdings were added to, 1 positions were partially reduced, and 0 were completely exited. The largest of these moves: New buy: Talen Energy CORP (TLN); Trim: Constellation Energy (CEG) — shares -34.81%
What sectors does ECP ControlCo, LLC focus on?
ECP ControlCo, LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Utilities: 100.0%
Investment Profile
ECP ControlCo, LLC returned an annualized -8.4% over the trailing 36 months — underperforming the S&P 500 by 12.6 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.36 (less volatile than the market) and a 36% quarterly batting average against the index.
Its portfolio is concentrated and fast-trading, with 100.0% of the portfolio concentrated in Utilities.
Its turnover score has fallen from 100 to 64 over the past 4 quarters — a shift toward longer holding periods.
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Developer Access
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REST API
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