ARTA
IO

A.R.T. Advisors’s ION Geophysical Corporation IO Stock Holding History

A.R.T. Advisors’s Portfolio IO Stock Details IO Fund Activity
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Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2020
Q1 		– Sell
2019
Q4 		$186K Buy
2019
Q1 		– Sell
2018
Q4 		$90K Buy
2018
Q2 		– Sell
2018
Q1 		$377K Buy
2017
Q2 		– Sell
2017
Q1 		$202K Buy
2016
Q4 		$83K Buy
2013
Q3 		– Sell
2013
Q2 		$175K Buy