Who owns Tidewater Inc. (TDW)
Which tracked institutional funds hold TDW, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TDW company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on TDW is one-sided between 2025-Q4 and 2026-Q1: 179 added or opened and 41 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TDW’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes TDW more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in TDW divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 362 tracked filers holding TDW, 218 increased or opened the position and 153 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TDW between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 30
- VANGUARD PORTFOLIO MANAGEMENT LLC$219M
- VANGUARD CAPITAL MANAGEMENT LLC$162M
- BAILLIE GIFFORD & CO$55M
- Sourcerock Group LLC$35M
- VANGUARD FIDUCIARY TRUST CO$27M
- KEYBANK NATIONAL ASSOCIATION/OH$25M
Full exits 25
- VANGUARD GROUP INC$224M
- SummitTX Capital, L.P.$11M
- Lloyd Harbor Capital Management, LLC$10M
- NORGES BANK$4M
- JANE STREET GROUP, LLC$4M
- VALUE HOLDINGS MANAGEMENT CO. LLC$3M
Largest adds
- WELLINGTON MANAGEMENT GROUP LLP$102M
- ROBOTTI ROBERT$95M
- UBS Group AG$88M
- NEUBERGER BERMAN GROUP LLC$86M
- BlackRock, Inc.$79M
- STATE STREET CORP$67M
Largest trims
- Pacer Advisors, Inc.$25M
- Cerity Partners LLC$12M
- Point72 Asset Management, L.P.$10M
- CX Institutional$6M
- SG Americas Securities, LLC$5M
- Freestone Grove Partners LP$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 5,113,318 | $427M | 9.8% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 3,271,371 | $273M | 6.3% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 3,207,302 | $268M | 6.1% | 2026-Q1 |
| ROBOTTI ROBERT trimmed | 2,920,689 | $244M | 5.6% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,626,645 | $219M | 5.0% | 2026-Q1 |
| STATE STREET CORP added | 1,948,425 | $163M | 3.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,942,871 | $162M | 3.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,838,769 | $154M | 3.5% | 2026-Q1 |
| UBS Group AG added | 1,511,390 | $126M | 2.9% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,335,242 | $112M | 2.6% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,303,297 | $109M | 2.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,141,644 | $95M | 2.2% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 1,072,793 | $90M | 2.0% | 2026-Q1 |
| THIRD AVENUE MANAGEMENT LLC added | 921,181 | $77M | 1.8% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 861,781 | $72M | 1.6% | 2026-Q1 |
| Driehaus Capital Management LLC added | 758,536 | $63M | 1.4% | 2026-Q1 |
| Hosking Partners LLP added | 662,422 | $55M | 1.3% | 2026-Q1 |
| BAILLIE GIFFORD & CO new | 655,393 | $55M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 563,550 | $47M | 1.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 561,486 | $47M | 1.1% | 2026-Q1 |
| Cerity Partners LLC trimmed | 542,609 | $45M | 1.0% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 501,254 | $42M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 484,973 | $41M | 0.9% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 436,085 | $36M | 0.8% | 2026-Q1 |
| Boston Partners added | 426,390 | $36M | 0.8% | 2026-Q1 |
| Sourcerock Group LLC added | 423,513 | $35M | 0.8% | 2026-Q1 |
| Old West Investment Management, LLC added | 410,257 | $34M | 0.8% | 2026-Q1 |
| FORT WASHINGTON INVESTMENT ADVISORS INC /OH/ trimmed | 400,420 | $33M | 0.8% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 398,931 | $33M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 379,161 | $32M | 0.7% | 2026-Q1 |
| Empire Life Investments Inc. trimmed | 362,441 | $30M | 0.7% | 2026-Q1 |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. added | 347,913 | $29M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp added | 323,869 | $27M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 318,210 | $27M | 0.6% | 2026-Q1 |
| VALUEWORKS LLC trimmed | 317,632 | $27M | 0.6% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 314,587 | $26M | 0.6% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 306,514 | $26M | 0.6% | 2026-Q1 |
| KEYBANK NATIONAL ASSOCIATION/OH new | 304,682 | $25M | 0.6% | 2026-Q1 |
| VILLERE ST DENIS J & CO LLC trimmed | 292,866 | $24M | 0.6% | 2026-Q1 |
| Condire Management, LP | 285,900 | $24M | 0.5% | 2026-Q1 |
| FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. added | 282,838 | $24M | 0.5% | 2026-Q1 |
| Invesco Ltd. added | 281,573 | $24M | 0.5% | 2026-Q1 |
| AEGIS FINANCIAL CORP | 276,529 | $23M | 0.5% | 2026-Q1 |
| Canoe Financial LP new | 274,800 | $23M | 0.5% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 272,549 | $23M | 0.5% | 2026-Q1 |
| FMR LLC trimmed | 255,543 | $21M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 247,218 | $21M | 0.5% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 242,371 | $20M | 0.5% | 2026-Q1 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC added | 187,921 | $16M | 0.4% | 2026-Q1 |
| Pacer Advisors, Inc. trimmed | 184,959 | $15M | 0.4% | 2026-Q1 |
| Alyeska Investment Group, L.P. new | 177,280 | $15M | 0.3% | 2026-Q1 |
| Public Sector Pension Investment Board added | 164,889 | $14M | 0.3% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 156,846 | $13M | 0.3% | 2026-Q1 |
| De Lisle Partners LLP added | 126,273 | $11M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 125,642 | $10M | 0.2% | 2026-Q1 |
| PINNACLE ASSOCIATES LTD trimmed | 122,457 | $10M | 0.2% | 2026-Q1 |
| Cambria Investment Management, L.P. trimmed | 121,297 | $10M | 0.2% | 2026-Q1 |
| American Family Investments, Inc. | 119,817 | $10M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 119,024 | $10M | 0.2% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 116,156 | $10M | 0.2% | 2026-Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH added | 115,924 | $10M | 0.2% | 2026-Q1 |
| Moerus Capital Management LLC added | 107,992 | $9M | 0.2% | 2026-Q1 |
| TimesSquare Capital Management, LLC new | 107,282 | $9M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 107,254 | $9M | 0.2% | 2026-Q1 |
| South Dakota Investment Council trimmed | 98,242 | $8M | 0.2% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 97,948 | $8M | 0.2% | 2026-Q1 |
| BESSEMER GROUP INC added | 97,719 | $8M | 0.2% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 90,459 | $8M | 0.2% | 2026-Q1 |
| THOMPSON SIEGEL & WALMSLEY LLC trimmed | 84,130 | $7M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 83,334 | $7M | 0.2% | 2026-Q1 |
| First Pacific Advisors, LP trimmed | 82,549 | $7M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 80,118 | $7M | 0.2% | 2026-Q1 |
| JUPITER ASSET MANAGEMENT LTD added | 71,835 | $6M | 0.1% | 2026-Q1 |
| Naviter Wealth, LLC trimmed | 66,497 | $6M | 0.1% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 66,446 | $6M | 0.1% | 2026-Q1 |
| GROUP ONE TRADING LLC added | 62,548 | $5M | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 60,226 | $5M | 0.1% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 58,030 | $5M | 0.1% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 57,434 | $5M | 0.1% | 2026-Q1 |
| WITTENBERG INVESTMENT MANAGEMENT, INC. trimmed | 55,962 | $5M | 0.1% | 2026-Q1 |
| Marnell Management LLC trimmed | 55,120 | $5M | 0.1% | 2026-Q1 |
| FIFTH THIRD BANCORP added | 53,277 | $4M | 0.1% | 2026-Q1 |
| Empowered Funds, LLC trimmed | 50,804 | $4M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 4,439,861 | $224M | 5.1% | 2025-Q4 stale |
| GOLDENTREE ASSET MANAGEMENT LP trimmed | 731,333 | $34M | 0.8% | 2025-Q2 stale |
| Pilgrim Global Advisors LLC trimmed | 608,448 | $32M | 0.7% | 2025-Q3 stale |
| Praetorian PR LLC added | 455,000 | $19M | 0.4% | 2025-Q1 stale |
| SummitTX Capital, L.P. new | 225,755 | $11M | 0.3% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 267,584 | $11M | 0.3% | 2025-Q1 stale |
| Sagil Capital LLP trimmed | 201,763 | $11M | 0.2% | 2025-Q3 stale |
| Corigliano Investment Advisers, LLC added | 191,700 | $10M | 0.2% | 2025-Q3 stale |
| Lloyd Harbor Capital Management, LLC | 193,589 | $10M | 0.2% | 2025-Q4 stale |
| LOOMIS SAYLES & CO L P trimmed | 155,021 | $8M | 0.2% | 2025-Q3 stale |
| Trexquant Investment LP added | 159,167 | $7M | 0.2% | 2025-Q1 stale |
| J. Goldman & Co LP added | 118,602 | $5M | 0.1% | 2025-Q2 stale |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 112,883 | $5M | 0.1% | 2025-Q2 stale |
| River Road Asset Management, LLC added | 101,780 | $5M | 0.1% | 2025-Q2 stale |
| WINTON GROUP Ltd added | 94,192 | $5M | 0.1% | 2025-Q3 stale |
| NORGES BANK trimmed | 85,719 | $4M | 0.1% | 2025-Q4 stale |
| JANE STREET GROUP, LLC trimmed | 84,210 | $4M | 0.1% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.