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: 09-30-2019
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: BOSTON ADVISORS LLC
Address: ONE LIBERTY SQUARE
10TH FLOOR
BOSTON, MA  02109
Form 13F File Number: 028-07196

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: Timothy Kirwan
Title: Chief Compliance Officer
Phone: 617-348-3174
Signature, Place, and Date of Signing:
Timothy Kirwan BostonMA 09-30-2019
[Signature] [City, State] [Date]
After the close of business on September 30, 2019, Boston Advisors, LLC ("Boston Advisors") closed on the sale of its advisory business in two different asset transactions. The assets of Boston Advisors's institutional [client] business were sold to Knights of Columbus Asset Advisors, LLC of New Haven, CT (13F file Number: 028-17560). The assets of Boston Advisors's wealth [management] business were sold to CAPTRUST Financial Advisors of Raleigh, NC (13F File Number: 028-14079). As a result of the closing, this Form 13F filing for the quarter ended September 30,2019 will be the final Form 13F filed by Boston Advisors.
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: 0
Form 13F Information Table Entry Total: 597
Form 13F Information Table Value Total: 1,914,725
(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.]
NONE