% of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for WTTR in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| FRANKLIN RESOURCES INC | 220K | 3.7M | 2.8M | 4.9M | 7.7M | 10.9M | $166M |
| BlackRock, Inc. | 9.2M | 9.0M | 9.0M | 8.7M | 9.2M | 9.6M | $147M |
| DIMENSIONAL FUND ADVISORS LP | 6.5M | 6.5M | 6.3M | 6.3M | 6.4M | 6.6M | $100M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 4.9M | $76M |
| AMERICAN CENTURY COMPANIES INC | 3.2M | 3.5M | 3.7M | 3.9M | 3.8M | 4.0M | $61M |
| WELLINGTON MANAGEMENT GROUP LLP | 3.8M | 4.1M | 4.4M | 5.1M | 4.9M | 4.0M | $61M |
| Crestview Partners II GP, L.P. | 3.9M | 3.9M | 3.9M | 3.9M | 3.9M | 3.9M | $60M |
| DEPRINCE RACE & ZOLLO INC | — | — | 264K | 3.8M | 3.6M | 3.5M | $54M |
| STATE STREET CORP | 2.7M | 2.8M | 2.9M | 2.8M | 3.2M | 3.3M | $51M |
| VAN ECK ASSOCIATES CORP | 2.0M | 2.0M | 1.9M | 1.9M | 2.1M | 3.2M | $49M |
| Encompass Capital Advisors LLC | — | — | — | 2.4M | 3.1M | 3.1M | $47M |
| Merewether Investment Management, LP | — | — | — | — | — | 2.9M | $44M |
| VICTORY CAPITAL MANAGEMENT INC | 3.7M | 4.0M | 3.9M | 3.6M | 3.5M | 2.7M | $42M |
| Webs Creek Capital Management LP | 2.4M | 2.5M | 4.4M | 3.1M | 3.1M | 2.6M | $39M |
| GEODE CAPITAL MANAGEMENT, LLC | 2.1M | 2.2M | 2.2M | 2.2M | 2.3M | 2.5M | $38M |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +4,942,554 | $76M | OPEN |
| FRANKLIN RESOURCES INC | +3,146,350 | $48M | ADD |
| Merewether Investment Management, LP | +2,889,000 | $44M | OPEN |
| Divisadero Street Capital Management, LP | +1,901,651 | $29M | OPEN |
| VANGUARD PORTFOLIO MANAGEMENT LLC | +1,482,524 | $23M | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −6,101,889 | $93M | CLOSE |
| WELLINGTON MANAGEMENT GROUP LLP | −929,984 | $14M | TRIM |
| VICTORY CAPITAL MANAGEMENT INC | −822,013 | $13M | TRIM |
| Webs Creek Capital Management LP | −558,825 | $9M | TRIM |
| Lane Generational LLC | −367,818 | $6M | CLOSE |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the 2026-03-31 close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 253 | 116,855,462 | — | $1.8B |
| 2025-Q4 | 205 | 99,274,422 | — | $1.0B |
| 2025-Q3 | 209 | 97,732,112 | — | $1.0B |
| 2025-Q2 | 229 | 91,841,728 | — | $794M |
| 2025-Q1 | 247 | 93,459,374 | — | $983M |
| 2024-Q4 | 229 | 93,269,516 | — | $1.2B |
| 2024-Q3 | 219 | 90,933,996 | — | $1.0B |
| 2024-Q2 | 193 | 87,139,892 | — | $933M |
| 2024-Q1 | 200 | 85,961,400 | — | $793M |
| 2023-Q4 | 186 | 77,567,128 | — | $589M |
| 2023-Q3 | 174 | 74,798,322 | — | $594M |
| 2023-Q2 | 156 | 73,104,447 | — | $592M |
| 2023-Q1 | 158 | 75,863,200 | — | $528M |
| 2022-Q4 | 170 | 73,503,895 | — | $646M |
| 2022-Q3 | 144 | 66,765,598 | — | $465M |
| 2022-Q2 | 145 | 66,794,024 | — | $456M |
| 2022-Q1 | 152 | 66,571,549 | — | $571M |
| 2021-Q4 | 124 | 63,896,086 | — | $398M |
| 2021-Q3 | 114 | 61,656,649 | — | $300M |
| 2021-Q2 | 127 | 60,577,391 | — | $343M |
| 2021-Q1 | 129 | 58,969,253 | — | $275M |
| 2020-Q4 | 121 | 62,322,958 | — | $241M |
| 2020-Q3 | 122 | 66,133,503 | — | $240M |
| 2020-Q2 | 122 | 63,561,880 | — | $292M |
| 2020-Q1 | 134 | 64,578,945 | — | $196M |
| 2019-Q4 | 137 | 64,833,218 | — | $566M |
| 2019-Q3 | 119 | 61,290,647 | — | $498M |
| 2019-Q2 | 124 | 63,173,719 | — | $689M |
| 2019-Q1 | 117 | 61,285,838 | — | $691M |
| 2018-Q4 | 122 | 62,268,081 | — | $370M |
| 2018-Q3 | 115 | 60,545,832 | — | $672M |
| 2018-Q2 | 116 | 55,609,746 | — | $753M |
| 2018-Q1 | 104 | 46,114,812 | — | $582M |
| 2017-Q4 | 95 | 45,725,790 | — | $539M |
| 2017-Q3 | 72 | 23,691,176 | — | $377M |
| 2017-Q2 | 66 | 19,755,192 | — | $240M |
| 2026-03-13 |
| SEC → |
Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).
