Tidewater Inc.
US ˙ NYSE ˙ US88642R1095

SecurityTDW / Tidewater Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,948,425 shares
Latest Disclosed Value $ 162,790,909
State Street Corp reports 2.45% increase in ownership of TDW / Tidewater Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,948,425 shares of Tidewater Inc. (US:TDW) valued at $162,790,909 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,901,880 shares of Tidewater Inc.. This represents a change in shares of 2.45% during the quarter. The current value of the position is $144,729,009 USD.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-15 2026-03-31 13F TIDEWATER INC COM 88642R109 1,948,425 46,545 2.45 162,791 69.46 0.0056
2026-02-13 2025-12-31 13F TIDEWATER INC COM 88642R109 1,901,880 85,697 4.72 96,064 -0.82 0.0032
2025-11-14 2025-09-30 13F TIDEWATER INC COM 88642R109 1,816,183 -16,740 -0.91 96,857 14.55 0.0034
2025-08-14 2025-06-30 13F TIDEWATER INC COM 88642R109 1,832,923 -77,729 -4.07 84,553 4.69 0.0032
2025-05-15 2025-03-31 13F TIDEWATER INC COM 88642R109 1,910,652 -76,709 -3.86 80,763 -25.72 0.0033
2025-02-14 2024-12-31 13F TIDEWATER INC COM 88642R109 1,987,361 120,196 6.44 108,729 -18.89 0.0043
2024-11-14 2024-09-30 13F TIDEWATER INC COM 88642R109 1,867,165 35,318 1.93 134,044 -23.14 0.0055
2024-08-14 2024-06-30 13F TIDEWATER INC COM 88642R109 1,831,847 695,616 61.22 174,410 66.85 0.0076
2024-05-15 2024-03-31 13F TIDEWATER INC COM 88642R109 1,136,231 -57,917 -4.85 104,533 21.39 0.0047
2024-02-14 2023-12-31 13F TIDEWATER INC COM 88642R109 1,194,148 -7,363 -0.61 86,110 0.84 0.0042
2023-11-14 2023-09-30 13F TIDEWATER INC COM 88642R109 1,201,511 21,448 1.82 85,391 30.52 0.0047
2023-08-14 2023-06-30 13F TIDEWATER INC COM 88642R109 1,180,063 -215,547 -15.44 65,423 6.35 0.0034
2023-05-15 2023-03-31 13F TIDEWATER INC COM 88642R109 1,395,610 159,961 12.95 61,518 35.11 0.0035
2023-05-15 2022-12-31 13F/A-99 TIDEWATER INC COM 88642R109 1,235,649 155,429 14.39 45,534 94.25 0.0027
2023-05-15 2022-12-31 13F TIDEWATER INC COM 88642R109 1,235,649 155,429 45,534 0.0027
2022-11-15 2022-09-30 13F TIDEWATER INC COM 88642R109 1,080,220 11,950 1.12 23,441 4.04 0.0015
2022-08-15 2022-06-30 13F TIDEWATER INC COM 88642R109 1,068,270 105,125 10.91 22,530 7.60 0.0014
2022-05-16 2022-03-31 13F TIDEWATER INC COM 88642R109 963,145 153,115 18.90 20,939 141.37 0.0010
2022-02-14 2021-12-31 13F TIDEWATER INC COM 88642R109 810,030 -4,194 -0.52 8,675 -11.66 0.0004
2021-11-15 2021-09-30 13F TIDEWATER INC COM 88642R109 814,224 -54,036 -6.22 9,820 -6.15 0.0005
2021-08-16 2021-06-30 13F TIDEWATER INC COM 88642R109 868,260 27,998 3.33 10,463 -0.62 0.0006
2021-07-09 2021-03-31 13F/A-1 TIDEWATER INC COM 88642R109 840,262 -553,578 -39.72 10,528 -12.58 0.0006
2021-05-17 2021-03-31 13F TIDEWATER INC COM 88642R109 840,262 -553,578 10,528 0.0006
2021-02-16 2020-12-31 13F TIDEWATER INC COM 88642R109 1,393,840 656,030 88.92 12,043 143.24 0.0007
2020-11-10 2020-09-30 13F TIDEWATER INC COM 88642R109 737,810 2,043 0.28 4,951 20.37 0.0003
2020-08-14 2020-06-30 13F TIDEWATER INC COM 88642R109 735,767 -151,215 -17.05 4,113 -34.51 0.0003
2020-06-19 2020-03-31 13F/A-1 TIDEWATER INC COM 88642R109 886,982 28,711 3.35 6,280 -62.05 0.0005
2020-05-11 2020-03-31 13F TIDEWATER INC COM 88642R109 886,982 28,711 6,280 551.5104
2020-02-06 2019-12-31 13F TIDEWATER INC COM 88642R109 858,271 37,762 4.60 16,547 33.47 0.0011
2019-11-14 2019-09-30 13F TIDEWATER INC COM 88642R109 820,509 64,356 8.51 12,398 -30.17 0.0009
2019-08-14 2019-06-30 13F TIDEWATER INC COM 88642R109 756,153 129,101 20.59 17,754 22.10 0.0013
2019-05-15 2019-03-31 13F TIDEWATER INC COM 88642R109 627,052 3,902 0.63 14,541 21.98 0.0011
2019-02-12 2018-12-31 13F TIDEWATER INC COM 88642R109 623,150 37,728 6.44 11,921 -34.72 0.0011
2018-11-09 2018-09-30 13F TIDEWATER Common equity shares 88642R109 585,422 62,718 12.00 18,260 20.74 0.0014
2018-08-14 2018-06-30 13F TIDEWATER Common equity shares 88642R109 522,704 405,228 344.95 15,124 349.85 0.0013
2018-05-15 2018-03-31 13F TIDEWATER Common equity shares 88642R109 117,476 82,650 237.32 3,362 296.00 0.0003
2018-02-14 2017-12-31 13F TIDEWATER Common equity shares 88642R109 34,826 -9,844 -22.04 849 -34.64 0.0001
2017-11-14 2017-09-30 13F TIDEWATER Common equity shares 88642R109 44,670 5,166 13.08 1,299 4,230.00 0.0001
2017-08-14 2017-06-30 13F TIDEWATER Common equity shares 886423102 39,504 -1,080,979 -96.47 30 -97.67 0.0000
2017-05-15 2017-03-31 13F TIDEWATER Common equity shares 886423102 1,120,483 -41,392 -3.56 1,289 -67.43 0.0001
2017-02-09 2016-12-31 13F TIDEWATER Common equity shares 886423102 1,161,875 12,351 1.07 3,958 22.16 0.0004
2017-01-13 2016-09-30 13F/A-1 TIDEWATER Common equity shares 886423102 1,149,524 -120,801 -9.51 3,240 -42.19 0.0003
2016-11-14 2016-09-30 13F TIDEWATER Common equity shares 886423102 1,149,524 3,240
2016-08-12 2016-06-30 13F TIDEWATER Common equity shares 886423102 1,270,325 -11,478 -0.90 5,605 -35.97 0.0006
2016-05-20 2016-03-31 13F/A-1 TIDEWATER Common equity shares 886423102 1,281,803 -529,039 -29.22 8,754 -30.55 0.0009
2016-05-12 2016-03-31 13F TIDEWATER Common equity shares 886423102 1,281,803 8,754
2016-02-16 2015-12-31 13F TIDEWATER Common equity shares 886423102 1,810,842 479,626 36.03 12,604 -27.95 0.0014
2015-11-16 2015-09-30 13F TIDEWATER Common equity shares 886423102 1,331,216 -450,663 -25.29 17,493 -56.81 0.0020
2015-08-13 2015-06-30 13F TIDEWATER Common equity shares 886423102 1,781,879 233,377 15.07 40,507 36.70 0.0043
2015-05-15 2015-03-31 13F TIDEWATER Common equity shares 886423102 1,548,502 149,740 10.71 29,633 -34.64 0.0030
2015-02-11 2014-12-31 13F TIDEWATER Common equity shares 886423102 1,398,762 8,794 0.63 45,335 -16.43 0.0045
2014-11-12 2014-09-30 13F/A-1 TIDEWATER Common equity shares 886423102 1,389,968 -50,967 -3.54 54,250 -32.95 0.0058
2014-11-10 2014-09-30 13F TIDEWATER Common equity shares 886423102 1,389,968 54,250
2014-08-12 2014-06-30 13F TIDEWATER Common equity shares 886423102 1,440,935 7,281 0.51 80,910 16.07 0.0087
2014-05-15 2014-03-31 13F/A-1 TIDEWATER Common equity shares 886423102 1,433,654 25,959 1.84 69,708 -16.46 0.0079
2014-05-13 2014-03-31 13F TIDEWATER Common equity shares 886423102 1,434,171 69,733
2014-02-06 2013-12-31 13F/A-1 TIDEWATER Common equity shares 886423102 1,407,695 -26,550 -1.85 83,438 -1.88 0.0093
2014-02-06 2013-12-31 13F TIDEWATER Common equity shares 886423102 1,488,304 66,497
2013-11-12 2013-09-30 13F TIDEWATER Common equity shares 886423102 1,434,245 5,204 0.36 85,037 4.45 0.0105
2013-08-08 2013-06-30 13F TIDEWATER Common equity shares 886423102 1,429,041 1,429,041 81,412 0.0106
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.