Citadel Advisors’s Oceaneering OII Stock Holding History

Citadel Advisors’s Portfolio OII Stock Details OII Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$3.27M	Buy	+92,200	New	+$2.98M	﹤0.01%	5096
2025 Q4	–	Sell	-13,300	Closed	-$330K	–	13671
2025 Q3	$330K	Buy	+13,300	New	+$305K	﹤0.01%	10137
2025 Q2	–	Sell	-13,500	Closed	-$294K	–	14324
2025 Q1	$294K	Sell	13,500 -17,500	-56%	-$415K	﹤0.01%	9651
2024 Q4	$808K	Buy	31,000 +15,300	+97%	+$405K	﹤0.01%	7483
2024 Q3	$390K	Buy	15,700 +9,200	+142%	+$237K	﹤0.01%	8768
2024 Q2	$154K	Sell	6,500 -19,000	-75%	-$439K	﹤0.01%	10313
2024 Q1	$597K	Sell	25,500 -13,300	-34%	-$279K	﹤0.01%	7987
2023 Q4	$826K	Buy	38,800 +13,200	+52%	+$293K	﹤0.01%	7063
2023 Q3	$658K	Sell	25,600 -3,000	-10%	-$68.5K	﹤0.01%	7454
2023 Q2	$535K	Buy	28,600 +700	+3%	+$12.1K	﹤0.01%	7793
2023 Q1	$492K	Buy	27,900 +11,800	+73%	+$227K	﹤0.01%	8357
2022 Q4	$282K	Sell	16,100 -50,100	-76%	-$666K	﹤0.01%	9450
2022 Q3	$527K	Sell	66,200 -3,300	-5%	-$31K	﹤0.01%	8342
2022 Q2	$742K	Sell	69,500 -4,700	-6%	-$57.8K	﹤0.01%	7722
2022 Q1	$1.13M	Buy	74,200 +1,200	+2%	+$17.3K	﹤0.01%	7432
2021 Q4	$826K	Buy	73,000 +6,300	+9%	+$81.6K	﹤0.01%	8409
2021 Q3	$888K	Sell	66,700 -2,900	-4%	-$37.8K	﹤0.01%	8450
2021 Q2	$1.08M	Buy	69,600 +51,400	+282%	+$717K	﹤0.01%	8166
2021 Q1	$208K	Buy	18,200 +3,000	+20%	+$33.3K	﹤0.01%	11618
2020 Q4	$121K	Buy	+15,200	New	+$88.7K	﹤0.01%	10094
2020 Q1	–	Sell	-24,000	Closed	-$358K	–	9994
2019 Q4	$358K	Buy	24,000 +12,100	+102%	+$168K	﹤0.01%	7313
2019 Q3	$161K	Sell	11,900 -39,800	-77%	-$603K	﹤0.01%	8266
2019 Q2	$1.05M	Buy	+51,700	New	+$915K	﹤0.01%	5615
2019 Q1	–	Sell	-18,900	Closed	-$229K	–	9695
2018 Q4	$229K	Sell	18,900 -300	-2%	-$5.64K	﹤0.01%	7674
2018 Q3	$530K	Buy	+19,200	New	+$512K	﹤0.01%	6598
2017 Q4	–	Sell	-14,500	Closed	-$381K	–	8291
2017 Q3	$381K	Buy	+14,500	New	+$351K	﹤0.01%	5703
2017 Q1	–	Sell	-19,500	Closed	-$550K	–	7858
2016 Q4	$550K	Buy	19,500 +9,400	+93%	+$253K	﹤0.01%	4752
2016 Q3	$278K	Buy	10,100 +2,300	+29%	+$63.7K	﹤0.01%	5799
2016 Q2	$233K	Buy	7,800 +600	+8%	+$19.6K	﹤0.01%	5601
2016 Q1	$239K	Sell	7,200 -900	-11%	-$28K	﹤0.01%	5391
2015 Q4	$304K	Sell	8,100 -14,200	-64%	-$608K	﹤0.01%	5191
2015 Q3	$876K	Buy	22,300 +11,300	+103%	+$469K	﹤0.01%	3990
2015 Q2	$512K	Sell	11,000 -11,400	-51%	-$599K	﹤0.01%	4930
2015 Q1	$1.21M	Sell	22,400 -11,200	-33%	-$598K	﹤0.01%	3693
2014 Q4	$1.98M	Buy	33,600 +25,200	+300%	+$1.62M	﹤0.01%	2925
2014 Q3	$547K	Sell	8,400 -3,600	-30%	-$249K	﹤0.01%	4496
2014 Q2	$938K	Buy	12,000 +1,000	+9%	+$73.4K	﹤0.01%	3586
2014 Q1	$790K	Sell	11,000 -100	-0.9%	-$7.16K	﹤0.01%	3726
2013 Q4	$876K	Sell	11,100 -3,200	-22%	-$260K	﹤0.01%	3346
2013 Q3	$1.16M	Sell	14,300 -6,300	-31%	-$506K	﹤0.01%	2942
2013 Q2	$1.49M	Buy	+20,600	New	+$1.44M	﹤0.01%	2775

Other funds holding OII

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Brown Advisory Baltimore, Maryland $60.9B AUM 15.24% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

EARNEST Partners Atlanta, Georgia $24.3B AUM 34.41% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

MSIIA

Morgan Stanley Institutional Investment Advisors Greenwood Village, Colorado $1.04B AUM 22.76% 1-Year Est. Return

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

Citadel Advisors's OII Position: Q1 2026 in Review

Citadel Advisors increased its Oceaneering (OII) stake by 25% in Q1 2026, buying an estimated $505K and bringing the position to 78,377 shares worth $2.78M. The position accounts for ﹤0.01% of the portfolio, ranked #5420.

Citadel Advisors first reported a position in OII in Q2 2013 and has held it in 42 quarters since. The position peaked at $107M in Q1 2015. 366 funds tracked by Wall St. Rank hold OII as of Q1 2026.

Citadel Advisors held 78,377 shares of Oceaneering worth $2.78M as of Q1 2026.
Citadel Advisors bought 15,604 Oceaneering shares in Q1 2026, an estimated $505K.
Oceaneering made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #5420 holding.
Citadel Advisors first reported a position in Oceaneering in Q2 2013 and has held it in 42 quarters since.
Citadel Advisors's Oceaneering position peaked at $107M in Q1 2015.
366 funds tracked by Wall St. Rank held Oceaneering as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.