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WESTERN DIGITAL CORP
WESTERN DIGITAL CORP. Institutional holdings reported to the SEC.

Institutional Holders (2016Q3)
Portfolio Summary: 724 Institutional holders with a total value of $15,716,903,450.
#
Manager Name
Shares
Value ($)
%
Options
Notes
101 Sumitomo Mitsui DS Asset Management Company, Ltd 573,700 33,544,000 0.21%
102 BARCLAYS PLC 572,244 33,459,000 0.21% Put
103 BlackRock Finance, Inc. 557,862 32,618,000 0.21%
104 Harvest Capital Strategies LLC 554,740 32,436,000 0.21%
105 CITADEL ADVISORS LLC 544,000 31,808,000 0.20% Call
106 HSBC HOLDINGS PLC 532,066 31,112,000 0.20%
107 UNITED SERVICES AUTOMOBILE ASSOCIATION 515,325 30,131,000 0.19%
108 ALLIANCEBERNSTEIN L.P. 508,916 29,756,000 0.19%
109 RENAISSANCE GROUP LLC 496,138 29,009,000 0.18%
110 WOLVERINE TRADING LP /BD 495,600 28,879,000 0.18% Put
111 GOLDMAN SACHS GROUP INC 490,801 28,697,000 0.18% Call
112 TWO SIGMA INVESTMENTS, LP 469,588 27,457,000 0.17%
113 GLENMEDE TRUST CO NA 466,948 27,300,000 0.17%
114 BANK OF MONTREAL /CAN/ 462,535 27,045,000 0.17%
115 ONTARIO TEACHERS PENSION PLAN BOARD 460,686 26,936,000 0.17%
116 NEW YORK STATE TEACHERS RETIREMENT SYSTEM 457,130 26,728,000 0.17%
117 STATE OF WISCONSIN INVESTMENT BOARD 448,988 26,252,000 0.17%
118 Mizuho Trust & Banking Co., Ltd. 448,933 26,249,000 0.17%
119 Zurcher Kantonalbank (Zurich Cantonalbank) 443,353 25,923,000 0.16%
120 UBS Group AG 441,677 25,825,000 0.16%
121 PRINCIPAL FINANCIAL GROUP INC 440,262 25,742,000 0.16%
122 D. E. Shaw & Co., Inc. 433,153 25,326,000 0.16%
123 RHUMBLINE ADVISERS 427,786 25,013,000 0.16%
124 MILLENNIUM MANAGEMENT LLC 426,482 24,936,000 0.16%
125 FORT PITT CAPITAL GROUP, LLC 426,283 24,925,000 0.16%
126 VIRTUS CAPITAL ADVISERS, LLC 422,337 24,903,000 0.16%
127 ADAGE CAPITAL PARTNERS GP, L.L.C. 420,237 24,571,000 0.16%
128 LOEWS CORP 404,910 23,675,000 0.15%
129 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 400,968 23,445,000 0.15%
130 SCOUT INVESTMENTS, INC. 395,199 23,107,000 0.15%
131 Twin Tree Management, LP 389,400 22,768,000 0.14% Put
132 GAM Holding AG 370,496 21,659,000 0.14%
133 S&T BANK/PA 370,203 21,646,000 0.14%
134 BlackRock Japan Co. Ltd 363,427 21,250,000 0.14%
135 South Dakota Investment Council 360,580 21,083,000 0.13%
136 Jefferies Group LLC 360,100 21,055,000 0.13% Call
137 ARS Investment Partners, LLC 352,222 20,594,000 0.13%
138 MACQUARIE GROUP LTD 350,913 20,517,000 0.13%
139 MAPLE ROCK CAPITAL PARTNERS, INC. 350,000 20,465,000 0.13%
140 ABERDEEN ASSET MANAGEMENT PLC/UK 346,567 20,263,000 0.13%
141 FACTORY MUTUAL INSURANCE CO 346,200 20,242,000 0.13%
142 Chevy Chase Trust Holdings, LLC 344,873 20,165,000 0.13%
143 Contrarius Investment Management Ltd 341,723 19,981,000 0.13%
144 CANADA LIFE ASSURANCE Co 334,566 19,553,000 0.12%
145 BARCLAYS PLC 323,943 18,941,000 0.12% Call
146 Nationwide Fund Advisors 320,923 18,764,000 0.12%
147 SKYBRIDGE CAPITAL II, LLC 307,940 18,005,000 0.11%
148 TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 298,861 17,474,000 0.11%
149 EMERALD ACQUISITION LTD. 293,513 17,161,000 0.11%
150 CAPITAL FUND MANAGEMENT S.A. 292,000 17,073,000 0.11% Call
Page 3 of 15

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.