Archrock Inc. (AROC): Carlson Capital Increase Its Stake; Plans to Go Activist

NAMES OF
REPORTING PERSON

Carlson Capital, L.P.

CHECK THE APPROPRIATE BOX IF A MEMBER
OF A GROUP

(a)  ¨        (b)  x

SEC USE ONLY

SOURCE OF FUNDS

AF

CHECK BOX IF DISCLOSURE OF LEGAL
PROCEEDING IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) ¨

CITIZENSHIP OR PLACE OF
ORGANIZATION

Delaware

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY

EACH

REPORTING

PERSON

WITH

SOLE VOTING POWER

0

SHARED VOTING POWER

9,258,249

SOLE DISPOSITIVE POWER

0

SHARED DISPOSITIVE POWER

9,258,249

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

9,258,249

CHECK IF THE AGGREGATE AMOUNT IN ROW
(11) EXCLUDES CERTAIN SHARES ¨

PERCENT OF CLASS REPRESENTED BY AMOUNT
IN ROW (11) EXCLUDES CERTAIN SHARES

13.30%

TYPE OF REPORTING PERSON

PN; IA