SpiderRock Trading LLC - DOLBY LABORATORIES I ownership

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DOLBY LABORATORIES I's ticker is and the CUSIP is 25659T10.

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Quarter-by-quarter ownership
SpiderRock Trading LLC ownership history of DOLBY LABORATORIES I
ValueSharesWeighting
Q4 2014$7,000
+600.0%
2,000
+33.3%
0.02%
+533.3%
Q3 2014$1,000
-97.3%
1,500
-33.2%
0.00%
-99.0%
Q2 2013$37,000–2,245–0.29%–
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Other shareholders
DOLBY LABORATORIES I shareholders Q1 2015
NameSharesValueWeighting ↓
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 30,134$1,259,0000.01%
SpiderRock Trading LLC 1,000$1,0000.00%
SpiderRock Trading LLC 500$00.00%
View complete list of DOLBY LABORATORIES I shareholders