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
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
Report for the Calendar Year or Quarter Ended: 12-31-2020
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, MA  02116
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: Managing Director of Bain Capital Investors, LLC
Phone: 617-516-2000
Signature, Place, and Date of Signing:
/s/ Michael D. Ward Boston,  MA 02-16-2021
[Signature] [City, State] [Date]
Bain Capital Investors, LLC is the (i) general partner of Bain Capital Partners X, L.P., which is the general partner of Bain Capital Fund X, L.P., (ii) general partner of Bain Capital Integral Investors 2008, L.P., (iii) general partner of Bain Capital Partners Europe III, L.P., which is the general partner of Bain Capital Europe Fund III, L.P., (iv) administrative member of Bain Capital Integral Investors 2006, LLC, (v) sole member of BCPE Seminole GP LLC, which is the general partner of BCPE Seminole Holdings LP and (vi) manager of Bain Capital Partners XII, LLC, which is the general partner of Bain Capital Fund XII, LP, which is the sole member of BCPE Perception GP, LLC, which is the general partner of BC Perception Holdings, LP. Bain Capital Europe Fund III, L.P. and Bain Capital Fund X, L.P. each beneficially own 50% of Atalaya Luxco S.a.r.l., which is the general partner of Atalaya Luxco Topco S.C.A., which wholly owns Atalaya PIKco S.a r.l., which is the general partner of Atalaya Luxco PIKco S.C.A.
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: 16
Form 13F Information Table Entry Total: 7
Form 13F Information Table Value Total: 2,639,271
(thousands)
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 28-15506 Bain Capital Partners X, L.P.
2 28-15509 Bain Capital Fund X, L.P.
3 28-15576 Bain Capital Integral Investors 2008, L.P.
4 28-16250 Bain Capital Partners Europe III, L.P.
5 28-16251 Bain Capital Europe Fund III, L.P.
6 28-14482 Bain Capital Integral Investors 2006, LLC
7 28-16793 Atalaya Luxco S.a.r.l.
8 28-16798 Atalaya Luxco Topco S.C.A.
9 28-16792 Atalaya PIKco S.a r.l.
10 28-16750 Atalaya Luxco PIKco S.C.A
11 28-18474 BCPE Seminole GP LLC
12 28-18475 BCPE Seminole Holdings LP
13   Bain Capital Partners XII, LLC
14   Bain Capital Fund XII, LP
15   BCPE Perception GP, LLC
16   BC Perception Holdings, LP