SpiderRock Trading LLC - GULFMARK OFFSHORE IN ownership

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GULFMARK OFFSHORE IN's ticker is and the CUSIP is 40262920. A total of 1 filers reported holding GULFMARK OFFSHORE IN in Q1 2015. The put-call ratio across all filers is - and the average weighting 0.0%.

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Quarter-by-quarter ownership
SpiderRock Trading LLC ownership history of GULFMARK OFFSHORE IN
ValueSharesWeighting
Q4 2014$64,000
+220.0%
4,100
+173.3%
0.18%
+158.0%
Q3 2014$20,000
-61.5%
1,500
-29.3%
0.07%
-74.3%
Q1 2014$52,000
+2500.0%
2,121
-3.6%
0.27%
+2133.3%
Q3 2013$2,000
-93.3%
2,200
+29.1%
0.01%
-94.8%
Q2 2013$30,000–1,704–0.23%–
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Other shareholders
GULFMARK OFFSHORE IN shareholders Q1 2015
NameSharesValueWeighting ↓
SpiderRock Trading LLC 500$16,0000.06%
ID Management A/S 3,000$94,0000.04%
SpiderRock Trading LLC 1,000$4,0000.01%
INGALLS & SNYDER LLC 8,425$264,0000.01%
View complete list of GULFMARK OFFSHORE IN shareholders