The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

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OMB Number: 3235-0006
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Report for the Calendar Year or Quarter Ended: 03-31-2023
Check here if Amendment X Amendment Number: 1
This Amendment (Check only one.): X is a restatement.
   adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: ECP ControlCo, LLC
Address: 40 Beechwood Road
Summit, NJ  07901
Form 13F File Number: 028-18131
CRD Number (if applicable):
SEC File Number (if applicable):

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:
Name: Christopher Leininger
Title: General Counsel
Phone: 858-703-4400
Signature, Place, and Date of Signing:
/s/ Christopher Leininger San DiegoCA 08-14-2023
[Signature] [City, State] [Date]
This restatement amendment filing removes the following notification from the summary page: "Confidential Treatment Requested. (The Manager has omitted from this public Form 13F one or more holding(s) for which it is requesting confidential treatment from the U.S. Securities and Exchange Commission pursuant to section 13(f) of the Exchange Act and rule 24b-2 thereunder)." ECP ControlCo, LLC neither requested confidential treatment for any holdings nor omitted any holdings in Q1 2023. This is the only change that is made in this amendment filing to the original filing.
Report Type (Check only one.):
X 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.)
   13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).)
   13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 6
Form 13F Information Table Entry Total: 8
Form 13F Information Table Value Total: 499,387,384
(round to nearest dollar)
List of Other Included Managers:
Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.
[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]
No. Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
1 Energy Capital Partners GP III, LP 028-17890     0001697506
2 ENERGY CAPITAL PARTNERS III, LLC 028-17889     0001621292
3 Energy Capital Partners IV, LLC 028-20831     0001845291
4 Energy Capital Partners GP IV, LP 028-20830     0001844921
5 ECP V, LLC 028-23006     0001965163
6 ECP GP V, LP 028-23003     0001965168