Tidewater Inc.
MX ˙ BMV ˙ US88642R1095
SecurityMX:TDW / Tidewater Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership484,973 shares
Latest Disclosed Value $ 40,519,495
Northern Trust Corp reports 2.61% increase in ownership of TDW / Tidewater Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 484,973 shares of Tidewater Inc. (MX:TDW) valued at $40,519,495 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 472,647 shares of Tidewater Inc.. This represents a change in shares of 2.61% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F TIDEWATER INC COM 88642R109 484,973 12,326 2.61 40,519 69.73 0.0011
2026-02-17 2025-12-31 13F TIDEWATER INC COM 88642R109 472,647 -27,277 -5.46 23,873 -10.45 0.0006
2025-11-14 2025-09-30 13F TIDEWATER INC COM 88642R109 499,924 18,934 3.94 26,661 20.16 0.0008
2025-08-13 2025-06-30 13F TIDEWATER INC COM 88642R109 480,990 -5,024 -1.03 22,188 8.01 0.0031
2025-05-13 2025-03-31 13F TIDEWATER INC COM 88642R109 486,014 -9,336 -1.88 20,544 -24.20 0.0031
2025-02-14 2024-12-31 13F TIDEWATER INC COM 88642R109 495,350 28,859 6.19 27,101 -19.08 0.0038
2024-11-13 2024-09-30 13F TIDEWATER INC COM 88642R109 466,491 11,668 2.57 33,489 -22.66 0.0055
2024-08-14 2024-06-30 13F TIDEWATER INC COM 88642R109 454,823 19,363 4.45 43,304 8.09 0.0073
2024-05-14 2024-03-31 13F TIDEWATER INC COM 88642R109 435,460 -8,414 -1.90 40,062 25.17 0.0069
2024-02-13 2023-12-31 13F TIDEWATER INC COM 88642R109 443,874 -12,212 -2.68 32,008 -1.26 0.0058
2023-11-13 2023-09-30 13F TIDEWATER INC COM 88642R109 456,086 -2,708 -0.59 32,414 27.44 0.0063
2023-08-11 2023-06-30 13F TIDEWATER INC COM 88642R109 458,794 30,893 7.22 25,436 34.85 0.0049
2023-05-15 2023-03-31 13F TIDEWATER INC COM 88642R109 427,901 -3,592 -0.83 18,862 18.62 0.0037
2023-02-13 2022-12-31 13F TIDEWATER INC COM 88642R109 431,493 13,992 3.35 15,901 75.50 0.0033
2022-11-14 2022-09-30 13F TIDEWATER INC COM 88642R109 417,501 17,495 4.37 9,060 7.40 0.0021
2022-08-12 2022-06-30 13F TIDEWATER INC COM 88642R109 400,006 19,653 5.17 8,436 2.02 0.0018
2022-05-13 2022-03-31 13F TIDEWATER INC COM 88642R109 380,353 -12,881 -3.28 8,269 96.37 0.0015
2022-02-08 2021-12-31 13F TIDEWATER INC COM 88642R109 393,234 -15,169 -3.71 4,211 -14.50 0.0007
2021-11-15 2021-09-30 13F TIDEWATER INC COM 88642R109 408,403 -7,239 -1.74 4,925 -1.68 0.0009
2021-08-13 2021-06-30 13F TIDEWATER INC COM 88642R109 415,642 -4,637 -1.10 5,009 -4.88 0.0009
2021-05-12 2021-03-31 13F TIDEWATER INC COM 88642R109 420,279 -41,769 -9.04 5,266 31.91 0.0010
2021-02-11 2020-12-31 13F TIDEWATER INC COM 88642R109 462,048 -4,435 -0.95 3,992 27.50 0.0008
2020-11-16 2020-09-30 13F TIDEWATER INC COM 88642R109 466,483 -14,283 -2.97 3,131 16.48 0.0007
2020-08-14 2020-06-30 13F TIDEWATER INC COM 88642R109 480,766 -26,890 -5.30 2,688 -25.23 0.0006
2020-05-14 2020-03-31 13F TIDEWATER INC COM 88642R109 507,656 320 0.06 3,595 -63.25 0.0010
2020-02-14 2019-12-31 13F TIDEWATER INC COM 88642R109 507,336 10,316 2.08 9,781 30.24 0.0022
2019-11-13 2019-09-30 13F TIDEWATER INC COM 88642R109 497,020 102,221 25.89 7,510 -18.98 0.0018
2019-08-13 2019-06-30 13F TIDEWATER INC COM 88642R109 394,799 26,481 7.19 9,269 8.52 0.0022
2019-05-13 2019-03-31 13F TIDEWATER INC COM 88642R109 368,318 19,156 5.49 8,541 27.88 0.0021
2019-02-12 2018-12-31 13F TIDEWATER INC COM 88642R109 349,162 61,348 21.32 6,679 -25.60 0.0019
2018-11-14 2018-09-30 13F TIDEWATER INC COM 88642R109 287,814 23,145 8.74 8,977 17.24 0.0022
2018-09-18 2018-06-30 13F/A-1 TIDEWATER INC COM 88642R109 264,669 205,958 350.80 7,657 356.05 0.0019
2018-08-14 2018-06-30 13F TIDEWATER INC COM 88642R109 266,045 207,334 7,697
2018-05-09 2018-03-31 13F TIDEWATER INC COM 88642R109 58,711 -4,832 -7.60 1,679 8.25 0.0004
2018-02-14 2017-12-31 13F TIDEWATER INC COM 88642R109 63,543 -40,270 -38.79 1,551 -48.63 0.0004
2017-11-13 2017-09-30 13F TIDEWATER INC COM 88642R109 103,813 44,968 76.42 3,019 7,088.10 0.0008
2017-08-11 2017-06-30 13F TIDEWATER COM 886423102 58,845 -514,971 -89.74 42 -93.64 0.0000
2017-05-12 2017-03-31 13F TIDEWATER COM 886423102 573,816 1,342 0.23 660 -66.19 0.0002
2017-02-13 2016-12-31 13F TIDEWATER COM 886423102 572,474 -156,583 -21.48 1,952 -5.06 0.0006
2016-11-09 2016-09-30 13F TIDEWATER COM 886423102 729,057 -8,394 -1.14 2,056 -36.78 0.0006
2016-08-12 2016-06-30 13F TIDEWATER COM 886423102 737,451 178,698 31.98 3,252 -19.64 0.0011
2016-08-19 2016-03-31 13F/A-1 TIDEWATER COM 886423102 558,753 9,510 1.73 4,047 5.86 0.0013
2016-05-13 2016-03-31 13F Tidewater COMM 886423102 558,751 3,816
2016-02-12 2015-12-31 13F Tidewater COMM 886423102 549,243 15,248 2.86 3,823 -45.51 0.0013
2015-11-12 2015-09-30 13F Tidewater COMM 886423102 533,995 533,995 0.00 7,016 0.0023
2015-08-13 2015-06-30 13F Tidewater COMM 886423102 0 -469,228 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Tidewater COMM 886423102 469,228 -134,348 -22.26 8,981 -54.09 0.0027
2015-02-12 2014-12-31 13F Tidewater COM 886423102 603,576 92,463 18.09 19,562 -1.94 0.0059
2014-11-13 2014-09-30 13F Tidewater COMM 886423102 511,113 26,739 5.52 19,949 -26.65 0.0063
2014-08-14 2014-06-30 13F TIDEWATER com 886423102 484,374 -86,941 -15.22 27,197 -2.08 0.0085
2014-05-14 2014-03-31 13F TIDEWATER COMM 886423102 571,315 48,576 9.29 27,776 -10.35 0.0087
2014-02-21 2013-12-31 13F/A-1 TIDEWATER COM 886423102 522,739 13,158 2.58 30,983 2.43 0.0099
2014-02-12 2013-12-31 13F TIDEWATER COM 886423102 522,739 30,983
2013-11-13 2013-09-30 13F TIDEWATER COM 886423102 509,581 36,724 7.77 30,248 12.29 0.0107
2013-08-09 2013-06-30 13F TIDEWATER COM 886423102 472,857 472,857 26,938 0.0098
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.