Arrowstreet Capital’s ION Geophysical Corporation IO Stock Holding History

Arrowstreet Capital’s Portfolio IO Stock Details IO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2020 Q4	–	Sell	-18,089	Closed	-$27K	–	2644
2020 Q3	$27K	Sell	18,089 -13,100	-42%	-$28.5K	﹤0.01%	2292
2020 Q2	$73K	Buy	31,189 +13,100	+72%	+$28.6K	﹤0.01%	2241
2020 Q1	$23K	Sell	18,089 -64,901	-78%	-$280K	﹤0.01%	1833
2019 Q4	$720K	Buy	+82,990	New	+$718K	﹤0.01%	1419
2018 Q3	–	Sell	-154,075	Closed	-$3.74M	–	1381
2018 Q2	$3.74M	Sell	154,075 -14,336	-9%	-$373K	0.01%	588
2018 Q1	$4.56M	Buy	+168,411	New	+$3.99M	0.01%	590
2014 Q2	–	Sell	-5,429	Closed	-$343K	–	1327
2014 Q1	$343K	Buy	+5,429	New	+$297K	﹤0.01%	1024

Other funds holding IO

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Deutsche Bank Frankfurt Am Main Ge, Germany $303B AUM 30.15% 1-Year Est. Return

Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

BCM

Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return

GCP

GSA Capital Partners London, United Kingdom $1.61B AUM 28.28% 1-Year Est. Return

RJFSA

Raymond James Financial Services Advisors St. Petersburg, Florida $75.1B AUM 31.89% 1-Year Est. Return

Arrowstreet Capital's IO Position: Q4 2020 in Review

Arrowstreet Capital sold out of ION Geophysical Corporation (IO) in Q4 2020, closing a stake of 18,089 shares — an estimated $27K sold.

Arrowstreet Capital first reported a position in IO in Q1 2014 and held it in 7 quarters. The position peaked at $4.56M in Q1 2018. 36 funds tracked by Wall St. Rank hold IO as of Q4 2020.

Arrowstreet Capital reported no remaining ION Geophysical Corporation position as of Q4 2020 after selling out during the quarter.
Arrowstreet Capital sold 18,089 ION Geophysical Corporation shares in Q4 2020, an estimated $27K.
Arrowstreet Capital first reported a position in ION Geophysical Corporation in Q1 2014 and held it in 7 quarters.
Arrowstreet Capital's ION Geophysical Corporation position peaked at $4.56M in Q1 2018.
36 funds tracked by Wall St. Rank held ION Geophysical Corporation as of Q4 2020.

Based on Arrowstreet Capital's 13F filing for Q4 2020, filed 12 Feb 2021.