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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Report for the Calendar Year or Quarter Ended: 06-30-2026
Check here if Amendment   Amendment Number:
This Amendment (Check only one.):   is a restatement.
  adds new holdings entries.
Institutional Investment Manager Filing this Report:
Name: Bain Capital Investors LLC
Address: 200 Clarendon Street
Boston , MA02116
Form 13F File Number: 028-11185

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: Michael D. Ward
Title: Partner of Bain Capital Investors, LLC
Phone: 617-516-2000
Signature, Place, and Date of Signing:
/s/ Michael D. Ward Boston , MA 08-14-2026
[Signature] [City, State] [Date]
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: 26
Form 13F Information Table Entry Total: 8
Form 13F Information Table Value Total: 4,815,782,405
(thousands)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Form 13F File Number Name
28-20812 Bain Capital Partners XII, LLC
28-20813 Bain Capital Fund XII, L.P.
28-25288 BCPE Nucleon Investors (GP), LLC
28-25286 BCPE Nucleon Investors, LP
28-25285 BCPE Nucleon (DE) SPV (GP), LLC
28-25284 BCPE Nucleon (DE) SPV, LP
28-26432 BCPE Watson (DE) Aggregator GP, LLC
28-26433 BCPE Watson (DE) Aggregator, LP
28-26431 BCPE Watson (DE) BML GP, LLC
28-26434 BCPE Watson (DE) BML, LP
28-26437 Bain Charger Holdings, L.P.
28-21922 Bain Capital Partners XI, L.P.
28-16158 Bain Capital Fund XI, L.P.
28-22026 BCPE Eagle GP, LLC
28-25287 BCPE Derby GP, LLC
28-25291 BCPE Derby (DE) SPV (GP), LLC
28-21915 BCPE Eagle Investor, LP
28-25289 BCPE Derby Investor, LP
28-25283 BCPE Derby (DE) SPV, LP
28-18474 BCPE Seminole GP LLC
28-18475 BCPE Seminole Holdings LP
28-22965 BCPE Seminole Holdings IV, L.P.
28-22974 BCPE Seminole GP II LLC
28-22973 BCPE Seminole GP III LLC
28-22977 BCPE Seminole Holdings II Intermediate LP
28-22967 BCPE Seminole Holdings III, L.P.

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. Form 13F File Number Name
1 28-20812 Bain Capital Partners XII, LLC
2 28-20813 Bain Capital Fund XII, L.P.
3 28-25288 BCPE Nucleon Investors (GP), LLC
4 28-25286 BCPE Nucleon Investors, LP
5 28-25285 BCPE Nucleon (DE) SPV (GP), LLC
6 28-25284 BCPE Nucleon (DE) SPV, LP
7 28-26432 BCPE Watson (DE) Aggregator GP, LLC
8 28-26433 BCPE Watson (DE) Aggregator, LP
9 28-26431 BCPE Watson (DE) BML GP, LLC
10 28-26434 BCPE Watson (DE) BML, LP
11 28-26437 Bain Charger Holdings, L.P.
12 28-21922 Bain Capital Partners XI, L.P.
13 28-16158 Bain Capital Fund XI, L.P.
14 28-22026 BCPE Eagle GP, LLC
15 28-25287 BCPE Derby GP, LLC
16 28-25291 BCPE Derby (DE) SPV (GP), LLC
17 28-21915 BCPE Eagle Investor, LP
18 28-25289 BCPE Derby Investor, LP
19 28-25283 BCPE Derby (DE) SPV, LP
20 28-18474 BCPE Seminole GP LLC
21 28-18475 BCPE Seminole Holdings LP
22 28-22965 BCPE Seminole Holdings IV, L.P.
23 28-22974 BCPE Seminole GP II LLC
24 28-22973 BCPE Seminole GP III LLC
25 28-22977 BCPE Seminole Holdings II Intermediate LP
26 28-22967 BCPE Seminole Holdings III, L.P.


ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

INFORMATION TABLE FOR FORM 13F