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NORTHWESTERN CORP
NORTHWESTERN CORP. Institutional holdings reported to the SEC.

Institutional Holders (2017Q2)
Portfolio Summary: 238 Institutional holders with a total value of $2,945,018,326.
#
Manager Name
Shares
Value ($)
%
Options
Notes
101 Verition Fund Management LLC 36,000 2,197,000 0.07%
102 Aperio Group, LLC 35,781 2,183,000 0.07%
103 BRIDGEWAY CAPITAL MANAGEMENT, LLC 35,500 2,166,000 0.07%
104 TEXAS PERMANENT SCHOOL FUND CORP 35,370 2,158,000 0.07%
105 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 33,917 2,069,616 0.07%
106 OXFORD ASSET MANAGEMENT LLP 33,326 2,034,000 0.07%
107 Magellan Asset Management Ltd 31,655 1,932,000 0.07%
108 GSA CAPITAL PARTNERS LLP 30,982 1,891,000 0.06%
109 GUGGENHEIM CAPITAL LLC 30,985 1,889,000 0.06%
110 Asset Management One Co., Ltd. 30,500 1,869,000 0.06%
111 TWO SIGMA INVESTMENTS, LP 30,303 1,849,000 0.06%
112 CANADA LIFE ASSURANCE Co 29,396 1,792,000 0.06%
113 SUSQUEHANNA INTERNATIONAL GROUP, LLP 29,327 1,790,000 0.06%
114 CREDIT AGRICOLE S A 29,280 1,786,000 0.06%
115 FEDERATION DES CAISSES DESJARDINS DU QUEBEC 28,900 1,760,491 0.06%
116 BNP PARIBAS FINANCIAL MARKETS 26,364 1,608,731 0.05%
117 MILLER HOWARD INVESTMENTS INC /NY 25,042 1,528,000 0.05%
118 RENAISSANCE TECHNOLOGIES LLC 25,026 1,527,000 0.05%
119 MASON STREET ADVISORS, LLC 23,665 1,444,000 0.05%
120 US BANCORP \DE\ 21,915 1,337,000 0.05%
121 D. E. Shaw & Co., Inc. 20,924 1,277,000 0.04%
122 VIRGINIA RETIREMENT SYSTEMS ET Al 20,600 1,257,000 0.04%
123 Arizona State Retirement System 20,400 1,245,000 0.04%
124 SHELL ASSET MANAGEMENT CO 20,245 1,235,000 0.04%
125 SEI INVESTMENTS CO 20,197 1,232,000 0.04%
126 STATE OF MICHIGAN RETIREMENT SYSTEM 20,000 1,220,000 0.04%
127 PNC FINANCIAL SERVICES GROUP, INC. 19,660 1,199,000 0.04%
128 BRINKER CAPITAL INC 19,514 1,191,000 0.04%
129 GATEWAY INVESTMENT ADVISERS LLC 19,496 1,190,000 0.04%
130 Municipal Employees' Retirement System of Michigan 18,700 1,141,000 0.04%
131 Ameritas Investment Partners, Inc. 18,459 1,126,000 0.04%
132 ZURICH FINANCIAL SERVICES/ /FI 18,400 1,123,000 0.04%
133 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 18,205 1,111,000 0.04%
134 UNITED SERVICES AUTOMOBILE ASSOCIATION 17,890 1,092,000 0.04%
135 QS Investors, LLC 17,669 1,078,000 0.04%
136 OREGON PUBLIC EMPLOYEES RETIREMENT FUND 17,646 1,077,000 0.04%
137 Liberty Mutual Group Asset Management Inc. 17,336 1,059,000 0.04%
138 TDAM USA INC. 16,366 999,000 0.03%
139 Sterling Capital Management LLC 16,106 983,000 0.03%
140 EULAV Asset Management 15,600 952,000 0.03%
141 AMP Capital Investors Ltd 14,661 898,000 0.03%
142 Bowling Portfolio Management LLC 14,345 875,000 0.03%
143 UBS Group AG 14,323 874,000 0.03%
144 Laurion Capital Management LP 14,200 866,000 0.03%
145 Airain ltd 13,991 854,000 0.03%
146 Cerity Partners OCIO LLC 13,856 846,000 0.03%
147 CHICAGO EQUITY PARTNERS LLC 13,670 834,000 0.03%
148 Louisiana State Employees Retirement System 12,600 769,000 0.03%
149 Numeric Investors LLC 12,100 738,000 0.03%
150 PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO 11,543 704,000 0.02%
Page 3 of 5

From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.