As of November 6, 2026, 6 holders' latest Schedule 13D or 13G filings report owning 5% or more of Waystar Holding Corp. The largest reported stake is Derby LuxCo S.a r.l.'s, at 14.2%. 14 filings are on record since July 29, 2025 (Schedule 13G/A, November 7, 2025).
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Key facts
- · Reporting person: Fmr LLC · Sole voting: 23,851,731 · Shared voting: 0 · Sole dispositive: 23,852,332 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-11-05
- · Holder: Fmr LLC · Percent: 10.2% · SCHEDULE 13G/A
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
- · Holder: Fmr LLC · Percent: 7.3% · SCHEDULE 13G
- · Holder: BCPE Derby (DE) SPV, LP · Percent: 5.9% · SCHEDULE 13G/A
Waystar Holding Corp has 14 Schedule 13D or 13G filings on record since 2025-07-29. 6 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Derby LuxCo S.a r.l. | 14.2% | 24,879,437 | SCHEDULE 13G/A, 2025-11-07 | 2025-09-30 |
| Fmr LLC | 12.4% | 23,852,332 | SCHEDULE 13G/A, 2026-11-05 | 2026-09-30 |
| Canada Pension Plan Investment Board | 9.9% | 19,025,452 | SCHEDULE 13G/A, 2025-11-13 | 2025-09-30 |
| BlackRock, Inc. | 9.1% | 15,925,871 | SCHEDULE 13G, 2025-10-17 | 2025-09-30 |
| BCPE Derby (DE) SPV, LP | 5.9% | 11,329,700 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Advent International, L.P. | 5.8% | 11,059,899 | SCHEDULE 13D, 2025-10-03 | 2025-10-01 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-27 | 2026-03-13 |
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More on Waystar Holding Corp and the records around it.
Waystar Holding Corp elsewhere on the record
- Form D filing Oct 2025
- Who owns it
Companies that share a holder
- ADVENT INTERNATIONAL, L.P. also filed stake reports on 5 other companies: Definitive Healthcare Corp. (Oct 2026), Intuitive Machines, Inc. (Jan 2026), CCC INTELLIGENT SOLUTIONS HOLDINGS INC. (Nov 2025)
- Canada Pension Plan Investment Board also filed stake reports on 12 other companies: ReNew Energy Global plc (Oct 2026), Americold Realty Trust, Inc. (Aug 2026), Chewy, Inc. (Aug 2026)
- FMR LLC also filed stake reports on 761 other companies: ASPEN NEUROSCIENCE INC (Nov 2026), AVALO THERAPEUTICS INC (Nov 2026), BRAZE INC (Nov 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Fmr LLC | 23,851,731 | 0 | 23,852,332 | 0 | SCHEDULE 13G/A, 2026-11-05 |
| Abigail P. Johnson | 0 | 0 | 23,852,332 | 0 | SCHEDULE 13G/A, 2026-11-05 |
The latest filing identifies Waystar Holding Corp by CUSIP 946784105 and gives its principal executive office as 1550 DIGITAL DRIVE, #300, LEHI, UT 84043 (SCHEDULE 13G/A, 2026-11-05).
Purpose of Transaction (Item 4)
Advent International, L.P.
The Reporting Persons hold the reported securities for investment purposes, but intend to review their investment in the Issuer on an ongoing basis and may seek to increase or decrease their position in the Issuer by purchasing additional Common Stock and/or other equity, debt, notes or other financial instruments related to the Issuer (including, for this purpose, any rights or securities exercisable or convertible into securities of the Issuer) or by selling or otherwise disposing of some or all of the reported Common Stock, other equity, debts, notes or other financial instruments (which dispositions may include distributions of some or all of such securities to such Reporting Person's respective members, stockholders, partners or beneficiaries, as applicable, transferring Issuer securities to affiliated transferees, or the entry into a total return swap, asset swap or repurchase transactions) from time to time, in each case, in open market or private transactions, block sales or otherwise. The Reporting Persons may also engage from time to time in ordinary course transactions with financial institutions with respect to the securities described herein. Any such transactions that any of the Reporting Persons or their affiliates may pursue may be made at any time and from time to time without prior notice and will depend on a variety of factors, including, without limitation, the price and availability of the Issuer's securities or other financial instruments; an …The first part of Item 4 of the SCHEDULE 13D filed 2025-10-03; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-29 | The Vanguard Group | 5.24% | SCHEDULE 13G |
| 2025-08-08 | Derby LuxCo S.a r.l. | 18.7% | SCHEDULE 13G/A |
| 2025-08-14 | BCPE Derby (DE) SPV, LP | 8.9% | SCHEDULE 13G/A |
| 2025-08-14 | Canada Pension Plan Investment Board | 14.3% | SCHEDULE 13G/A |
| 2025-10-03 | Advent International, L.P. | 5.8% | SCHEDULE 13D |
| 2025-10-17 | BlackRock, Inc. | 9.1% | SCHEDULE 13G |
| 2025-10-31 | The Vanguard Group | 7.05% | SCHEDULE 13G/A |
| 2025-11-07 | Derby LuxCo S.a r.l. | 14.2% | SCHEDULE 13G/A |
| 2025-11-13 | Canada Pension Plan Investment Board | 9.9% | SCHEDULE 13G/A |
| 2025-11-14 | BCPE Derby (DE) SPV, LP | 5.9% | SCHEDULE 13G/A |
| 2026-02-05 | Fmr LLC | 7.3% | SCHEDULE 13G |
| 2026-03-27 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-08-07 | Fmr LLC | 10.2% | SCHEDULE 13G/A |
| 2026-11-05 | Fmr LLC | 12.4% | SCHEDULE 13G/A |
Questions about who owns Waystar Holding Corp
Who owns Waystar Holding Corp?
On this page, 6 holders' latest ownership filings report 5% or more of Waystar Holding Corp: Derby LuxCo S.a r.l. (14.2%, Schedule 13G/A, filed 2025-11-07), Fmr LLC (12.4%, Schedule 13G/A, filed 2026-11-05), Canada Pension Plan Investment Board (9.9%, Schedule 13G/A, filed 2025-11-13), BlackRock, Inc. (9.1%, Schedule 13G, filed 2025-10-17) and BCPE Derby (DE) SPV, LP (5.9%, Schedule 13G/A, filed 2025-11-14); 1 more is listed above.
Who are the largest shareholders of Waystar Holding Corp?
By the share each holder's latest filing reports, the largest holders of Waystar Holding Corp on this page are Derby LuxCo S.a r.l. (14.2%), Fmr LLC (12.4%) and Canada Pension Plan Investment Board (9.9%).
When did Derby LuxCo S.a r.l. buy into Waystar Holding Corp?
The filings give report dates, not purchase dates. The earliest filing from Derby LuxCo S.a r.l. on this page is the Schedule 13G/A, filed 2025-08-08, reporting 18.7%; its latest, Schedule 13G/A filed 2025-11-07, reports 14.2%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 14 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Waystar Holding Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| October 10, 2025 | Form D, private offering | $620.84M sold | Form D page | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.