Filer Snapshot

ECP ControlCo, LLC

CIK 0001707921. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Company

Total filings

71

Latest filing

15 May 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13F-HR for Q1 2026. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

CEG

$6.16B reported value

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13D/G large stake

CEG

07 Jan 2026 · 6.1% ownership

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Source: SEC Form 13F

13F-HR filed on 15 May 2026 for CIK 0001707921.

View source filing
Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

13F portfolio$6.34B

Quarterly institutional holdings reported on Form 13F.

Forms 3/4/5 positions$321.07M

Reporting-owner positions with enough filing detail to estimate value.

Latest reported 13F value

13F
$6.34B

Reported market value from the latest parsed Form 13F information table; this is not total assets under management.

Forms 3/4/5 position value

3/4/5
$321.07M

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Largest 13F holdings

13F
CEG PCG SHEN CLNE

Largest symbols in the latest parsed Form 13F information table.

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

NOVA CTOS SHEN

Largest 13F holdings

Largest symbols in the latest parsed Form 13F information table.

CEG PCG SHEN CLNE

Largest active 13D stakes

Active large-stake positions disclosed in parsed Schedule 13D filings.

SHEN CTOS

Largest active 13G stakes

Passive or institutional large-stake positions disclosed in parsed Schedule 13G filings.

CEG NOVA
How to read these SEC ownership signals
  • Read each filing family separately: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different SEC disclosure questions.
  • Open the linked research path when you need the filing, CIK, issuer, or CUSIP trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 1 identity field
Business address
40 Beechwood Road, Summit, NJ, 07901
EDGAR profile Static EDGAR fields kept behind disclosure so the main profile stays readable. 2 profile fields available
Incorporated in
DE
Fiscal year end
31 December

Filer intelligence

What SEC filings say about ECP ControlCo, LLC

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

Open 13F portfolio Save filer

Quick read

  • Latest parsed 13F shows $6.34B across 4 reported holdings for Q1 2026.
  • Largest parsed 13F holding: CEG at $6.16B.
  • 4 recent 13D/G stake rows found; top row is CEG at 6.1% ownership.
  • Forms 3/4/5 show insider context for NOVA worth $194.86M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio 4 rows

Quarterly institutional portfolio holdings.

Open
13D/G stakes 4 rows

Beneficial ownership and large-stake disclosures.

Open
Forms 3/4/5 4 rows

Officer, director, and 10% owner holdings or transactions.

Open

Top parsed 13F holdings

Visual share of the latest parsed 13F portfolio. Values are reported market value, not a recommendation.

Q1 2026 - 15 May 2026

Top 5 concentration

100%

Share of latest parsed 13F value represented by the visible holdings below.

Top 5 reported value

$6.34B

Compared with $6.34B total 13F value.

Top 5 net change

+$6.11B

Position-value change inside the visible top holdings only.

13F concentration map

A simple visual split of the latest parsed 13F portfolio.

Largest add: CEG · Largest trim: XIFR

CEG PCG SHEN CLNE XIFR

CEG

97.1%

Constellation Energy Corp

$6.16B

PCG

2%

Pg&E Corp

$125.18M

SHEN

0.8%

Shenandoah Telecommunication

$53.31M

CLNE

0.1%

Clean Energy Fuels Corp

$6.44M

XIFR

0%

Xplr Infrastructure Lp

$0

13D/G large-stake context

CEG

07 Jan 2026 · Common Stock

6.1%
Issuer page 13D/G history

SHEN

08 Aug 2025 · Common Stock

12%
Issuer page 13D/G history

CTOS

30 Jan 2025 · Common Stock

0%
Issuer page 13D/G history

NOVA

31 Dec 2024 · Common Stock, $0.0001 par value per share

0%
Issuer page 13D/G history

Forms 3/4/5 insider context

NOVA

01 Nov 2021 · 10% owner

$194.86M
Issuer page Owner page

CTOS

05 Sep 2024 · 10% owner

$80.1M
Issuer page Owner page

SHEN

10 Sep 2025 · 10% owner

$46.12M
Issuer page Owner page

FSRD

04 Feb 2022 · 10% owner

Issuer page Owner page

Latest update

What changed recently for ECP ControlCo, LLC

New filing available

Latest 13F period: Q1 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

15 May 2026

Page type

Filer profile

Latest period

Q1 2026

Institutional portfolio context was refreshed from a 13F filing filed on 15 May 2026.

Open filer profile Browse recent public updates

Benchmark Context

Benchmark context for this company

ECP ControlCo, LLC has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

Compared with

Start on the facts page for period-to-period context, then open a metric ranking when you want to compare the same reported fact across other SEC-reporting companies.

Why this is notable

Latest 13F period: Q1 2026. That gives you a fresh baseline before you compare this company with peers.

  • Peer comparisons stay conservative: same metric, compatible units, latest valid company row only.
  • Open the facts page first if you want the cleanest path to verification.

Benchmark context is only shown where the app has enough comparable SEC-backed data to keep the interpretation honest.

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SEC filing record

CIK 0001707921 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
71
First seen
14 Aug 2017
Latest filing
15 May 2026
Entity
Company

Observed form types

13F-HR 13F-HR/A 13F-NT 4 4/A SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A

CIK-linked evidence first

ECP ControlCo, LLC SEC filings ECP ControlCo, LLC 13F portfolio ECP ControlCo, LLC 13D/G history ECP ControlCo, LLC owner filings Open SEC filing index

Latest Filings

Showing the latest 12 of 71 SEC filings for ECP ControlCo, LLC.

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13F-HR

13F-HR filing

Filing date
15 May 2026
Reporting date
31 Mar 2026
SEC evidence
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13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
30 Sep 2025
SEC evidence
Open document Open filing
Next action
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13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
30 Sep 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
30 Jun 2025
SEC evidence
Open document Open filing
Next action
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13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
30 Jun 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
31 Mar 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
13F-HR/A

13F-HR/A filing

Filing date
17 Feb 2026
Reporting date
31 Mar 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
13F-HR

13F-HR filing

Filing date
17 Feb 2026
Reporting date
31 Dec 2025
SEC evidence
Open document Open filing
Next action
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SCHEDULE 13G

SCHEDULE 13G filing

Filing date
14 Jan 2026
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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13F-HR

13F-HR filing

Filing date
14 Nov 2025
Reporting date
30 Sep 2025
SEC evidence
Open document Open filing
Next action
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13F-HR

13F-HR filing

Filing date
14 Aug 2025
Reporting date
30 Jun 2025
SEC evidence
Open document Open filing
Next action
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
12 Aug 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
Verify source filing
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