As of November 10, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Definitive Healthcare Corp. The largest reported stake is Advent International, L.P.'s, at 58.54%. 6 filings are on record since February 9, 2026 (Schedule 13D/A, October 1, 2026).
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Key facts
- · Reporting person: The Goldman Sachs Group, Inc. · Sole voting: 0 · Shared voting: 1,037,661 · Sole dispositive: 0 · Shared dispositive: 1,038,392 · SCHEDULE 13G/A, 2026-11-09
- · Reporting person: Advent International, L.P. · Sole voting: 0 · Shared voting: 62,493,676 · Sole dispositive: 0 · Shared dispositive: 62,493,676 · SCHEDULE 13D/A, 2026-10-01
- · Reporting person: Jason Ronald Krantz · Sole voting: 22,497,978 · Shared voting: 0 · Sole dispositive: 22,497,978 · Shared dispositive: 0 · SCHEDULE 13D, 2026-09-02
- · Holder: Advent International, L.P. · Percent: 58.54% · SCHEDULE 13D
- · Holder: Advent International, L.P. · Percent: 59.82% · SCHEDULE 13G/A
Definitive Healthcare Corp has 6 Schedule 13D or 13G filings on record since 2026-02-09. 2 holders' latest filing reports 5% or more of class a common stock, $0.001 par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Advent International, L.P. | 58.54% | 62,493,676 | SCHEDULE 13D/A, 2026-10-01 | 2026-09-29 |
| 17.6% | 22,497,978 | SCHEDULE 13D, 2026-09-02 | 2026-09-01 | |
| The Goldman Sachs Group, Inc. | 1% | 1,038,392 | SCHEDULE 13G/A, 2026-11-09 | 2026-09-30 |
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More on Definitive Healthcare Corp and the records around it.
Definitive Healthcare Corp elsewhere on the record
- Leadership changes Sep 2026
- Who owns it
Companies that share a holder
- Advent International, L.P. also filed stake reports on 5 other companies: Intuitive Machines, Inc. (Jan 2026), CCC INTELLIGENT SOLUTIONS HOLDINGS INC. (Nov 2025), First Watch Restaurant Group, Inc. (Nov 2025)
- THE GOLDMAN SACHS GROUP, INC. also filed stake reports on 173 other companies: AEON ACQUISITION I CORP. (Nov 2026), ALPEX ACQUISITION CORPORATION (Nov 2026), ARCHIMEDES TECH SPAC PARTNERS II CO. (Nov 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Advent International, L.P. | 0 | 62,493,676 | 0 | 62,493,676 | SCHEDULE 13D/A, 2026-10-01 |
| Advent International GP, LLC | 0 | 62,493,676 | 0 | 62,493,676 | SCHEDULE 13D/A, 2026-10-01 |
| Advent International GPE IX Limited Partnership | 16,955,510 | 0 | 16,955,510 | 0 | SCHEDULE 13D/A, 2026-10-01 |
| Advent International GPE IX-H Limited Partnership | 5,428,915 | 0 | 5,428,915 | 0 | SCHEDULE 13D/A, 2026-10-01 |
| Jason Ronald Krantz | 22,497,978 | 0 | 22,497,978 | 0 | SCHEDULE 13D, 2026-09-02 |
| The Goldman Sachs Group, Inc. | 0 | 1,037,661 | 0 | 1,038,392 | SCHEDULE 13G/A, 2026-11-09 |
| Goldman Sachs & Co. LLC | 0 | 1,037,661 | 0 | 1,038,392 | SCHEDULE 13G/A, 2026-11-09 |
The latest filing identifies Definitive Healthcare Corp by CUSIP 24477E103 and gives its principal executive office as 492 Old Connecticut Path, Suite 401, FRAMINGHAM (SCHEDULE 13G/A, 2026-11-09).
Source of funds (Item 3)
No securities were acquired in connection with the filing of this Schedule 13D. As the founder, former Chief Executive Officer and current Executive Chairman of the Board of Directors of the Issuer (the "Board"), the Reporting Person acquired his beneficial ownership in the Issuer primarily prior to the Issuer's initial public offering of the shares of the Class A Common Stock in September 2021 ("IPO"), except as noted below. The Reporting Person's beneficial ownership consists of both shares of Class A and Class B Common Stock.Jason Ronald Krantz, SCHEDULE 13D, 2026-09-02
Purpose of Transaction (Item 4)
Advent International, L.P.
Item 4 of the Schedule 13D is hereby amended and supplemented to insert the following at the end thereof: Confidentiality Agreement On September 29, 2026, Advent LP entered into a confidentiality agreement (the "NDA") with the Issuer. The NDA provides that Advent LP generally will not disclose confidential information to any other person, except to its representatives and Mr. Krantz, other third parties with respect to which the Issuer provides prior written approval and potential funding sources with respect to which the Issuer provides written approval, among others, and will not use confidential information except for the purpose of considering, evaluating and negotiating a transaction with the Issuer. The NDA also includes a 12-month non-solicitation provision with respect to the Issuer's executive officers and a 12-month standstill provision pursuant to which Advent LP agreed not to make certain acquisitions of securities or assets of the Issuer, join or participate in a "group" formed after the date of the NDA, seek additional representation on the Issuer's board of directors or advise or influence any person with respect to the voting of any securities of the Issuer, in each case without the prior written consent of the Issuer and subject to certain exceptions. In accordance with the NDA, Advent LP intends to continue to engage with the Special Committee and third parties, including Mr. Krantz, regarding a transaction with the Issuer. References to the NDA do not …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-10-01; the filing has the rest
Jason Ronald Krantz
Since February of 2022, the Reporting Person has filed a Statement of Beneficial Ownership on Schedule 13G and amendments thereto with respect to his beneficial ownership in the Issuer. As a result of the Proposal by the Advent Funds described below, which is premised on the Reporting Person's participation through a roll over arrangement, the Reporting Person is now converting his beneficial ownership filing on Schedule 13G to a filing on this Schedule 13D. On September 1, 2026, Advent International, L.P., on behalf of certain of its managed funds (the "Advent Funds"), submitted a preliminary non-binding indication of interest ("Proposal") to the Special Committee (the "Special Committee") of the Board of Directors of the Issuer related to the proposed acquisition by the Advent Funds of all the outstanding shares of the Issuer's Class A Common Stock and all of the LLC Units, in each case, that are not already owned by the Advent Funds and the Reporting Person for an all-cash purchase price of $1.02 per share of Class A Common Stock and an equivalent amount per LLC Unit (the "Advent Proposed Transaction"). Based on the Schedule 13D filed by the Advent Funds on September 2, 2026 (the "Advent Schedule 13D"), the Advent Funds have beneficial ownership of approximately 58.54% of the Issuer. The Proposal states that it is premised on the Reporting Person rolling over all his Class A Common Stock and LLC Units into equity of the surviving company. The Proposal also states that …The first part of Item 4 of the SCHEDULE 13D filed 2026-09-02; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2026-02-09 | The Goldman Sachs Group, Inc. | 5.7% | SCHEDULE 13G/A |
| 2026-05-14 | Advent International, L.P. | 59.82% | SCHEDULE 13G/A |
| 2026-09-02 | Advent International, L.P. | 58.54% | SCHEDULE 13D |
| 2026-09-02 | Jason Ronald Krantz | 17.6% | SCHEDULE 13D |
| 2026-10-01 | Advent International, L.P. | 58.54% | SCHEDULE 13D/A |
| 2026-11-09 | The Goldman Sachs Group, Inc. | 1% | SCHEDULE 13G/A |
Questions about who owns Definitive Healthcare Corp
Who owns Definitive Healthcare Corp?
On this page, 2 holders' latest ownership filings report 5% or more of Definitive Healthcare Corp: Advent International, L.P. (58.54%, Schedule 13D/A, filed 2026-10-01) and Jason Ronald Krantz (17.6%, Schedule 13D, filed 2026-09-02).
Who are the largest shareholders of Definitive Healthcare Corp?
By the share each holder's latest filing reports, the largest holders of Definitive Healthcare Corp on this page are Advent International, L.P. (58.54%) and Jason Ronald Krantz (17.6%).
When did Advent International, L.P. buy into Definitive Healthcare Corp?
The filings give report dates, not purchase dates. The earliest filing from Advent International, L.P. on this page is the Schedule 13G/A, filed 2026-05-14, reporting 59.82%; its latest, Schedule 13D/A filed 2026-10-01, reports 58.54%. 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%); 6 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 Definitive Healthcare Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 2, 2026 | Leadership change: Clay Ritchey appointed, Chief Executive Officer, and 1 more | — | Leadership changes | Source |
| April 3, 2026 | Leadership change filing (Form 8-K, Item 5.02) | — | Leadership changes | 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.