OII · Oceaneering International Inc

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.64 to $40.78 inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote to this Form 4.

The reporting person disclaims beneficial ownership of all of the shares held indirectly through this entity except to the extent of the pecuniary interest held therein.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.200 to $38.960 inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $38.200 to $38.690, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.20 to $35.383, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares sold at each separate price within the range set forth in this Footnote to this Form 4.

The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 1, 2025.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.750 to $38.715 inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.39 to $37.49, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.700 to $37.955, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $38.07 to $38.12, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.315 to $37.760, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.45 to $37.51, inclusive. The issuer undertakes to provide, upon request by the SEC staff or a security holder of the issuer, full information regarding the number of shares purchased at each separate price within the range set forth in this Footnote to this Form 4.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target level of performance.

Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

The restricted stock units vest in three equal annual installments on each of February 20, 2027, 2028 and 2029.

The reported transaction involved the receipt of a grant of restricted stock units by the reported person. The total reported in Column 9 excludes unvested restricted stock units that were granted in previous years, as the reporting person has previously reported awards of restricted stock units in Table I of Form 4.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target levels of performance.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target levels of performance.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target levels of performance.

Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

The restricted stock units vest in three equal annual installments on each of February 20, 2027, 2028 and 2029.

The reported transaction involved the receipt of a grant of restricted stock units by the reported person. The total reported in Column 9 excludes unvested restricted stock units that were granted in previous years, as the reporting person has previously reported awards of restricted stock units in Table I of Form 4.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target levels of performance.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target levels of performance.

Each performance stock unit represents a contingent right to receive between zero and two shares of the Company's common stock. The performance stock units vest upon achievement of specific target level of performance.

Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

The restricted stock units vest in three equal annual installments on each of February 20, 2027, 2028 and 2029.

The reported transaction involved the receipt of a grant of restricted stock units by the reported person. The total reported in Column 9 excludes unvested restricted stock units that were granted in previous years, as the reporting person has previously reported awards of restricted stock units in Table I of Form 4.

Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

The restricted stock units vest in three equal annual installments on each of February 20, 2027, 2028 and 2029.

The reported transaction involved the receipt of a grant of restricted stock units by the reported person. The total reported in Column 9 excludes unvested restricted stock units that were granted in previous years, as the reporting person has previously reported awards of restricted stock units in Table I of Form 4.

Each restricted stock unit represents a contingent right to receive one share of the Company's common stock.

The restricted stock units vest in three equal annual installments on each of February 20, 2027, 2028 and 2029.

The reported transaction involved the receipt of a grant of restricted stock units by the reported person. The total reported in Column 9 excludes unvested restricted stock units that were granted in previous years, as the reporting person has previously reported awards of restricted stock units in Table I of Form 4.