William Blair & Company
OII icon

William Blair & Company’s Oceaneering OII Stock Holding History

William Blair & Company’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
Q2 		$369K Sell
9,118
-792
-8% -$29.9K ﹤0.01% 1333
2026
Q1 		$352K Sell
9,910
-20
-0.2% -$647 ﹤0.01% 1272
2025
Q4 		$239K Sell
9,930
-34
-0.3% -$821 ﹤0.01% 1396
2025
Q3 		$247K Buy
+9,964
New +$229K ﹤0.01% 1385
2015
Q2 		– Sell
-439,749
Closed -$23.7M – 2226
2015
Q1 		$23.7M Buy
439,749
+9,903
+2% +$528K 0.04% 537
2014
Q4 		$25.3M Buy
429,846
+27,634
+7% +$1.77M 0.04% 518
2014
Q3 		$26.2M Sell
402,212
-47,838
-11% -$3.31M 0.04% 472
2014
Q2 		$35.2M Sell
450,050
-13,474
-3% -$988K 0.06% 407
2014
Q1 		$33.3M Sell
463,524
-7,602
-2% -$544K 0.06% 407
2013
Q4 		$37.2M Sell
471,126
-317,539
-40% -$25.8M 0.06% 396
2013
Q3 		$64.1M Sell
788,665
-286,498
-27% -$23M 0.11% 267
2013
Q2 		$77.6M Buy
+1,075,163
New +$75.1M 0.15% 198

Other funds holding OII

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Brown Advisory
Brown Advisory Baltimore, Maryland $64.6B AUM 18.98% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
EARNEST Partners
EARNEST Partners Atlanta, Georgia $27.7B AUM 52.44% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
MSIIA
Morgan Stanley Institutional Investment Advisors Greenwood Village, Colorado $1.07B AUM 29.17% 1-Year Est. Return

William Blair & Company's OII Position: Q2 2026 in Review

William Blair & Company reduced its Oceaneering (OII) stake by 8% in Q2 2026, selling an estimated $29.9K and leaving 9,118 shares worth $369K. The position accounts for ﹤0.01% of the portfolio, ranked #1333.

William Blair & Company first reported a position in OII in Q2 2013 and has held it in 12 quarters since. The position peaked at $77.6M in Q2 2013. 377 funds tracked by Wall St. Rank hold OII as of Q2 2026.

  • William Blair & Company held 9,118 shares of Oceaneering worth $369K as of Q2 2026.
  • William Blair & Company sold 792 Oceaneering shares in Q2 2026, an estimated $29.9K.
  • Oceaneering made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1333 holding.
  • William Blair & Company first reported a position in Oceaneering in Q2 2013 and has held it in 12 quarters since.
  • William Blair & Company's Oceaneering position peaked at $77.6M in Q2 2013.
  • 377 funds tracked by Wall St. Rank held Oceaneering as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.