Form
SCHEDULE 13D
Active or control-oriented beneficial ownership filing.
ADVENT INTERNATIONAL, L.P. - 01 Sep 2026 SCHEDULE 13D Report for Definitive Healthcare Corp. Class A Common Stock, $0.001 par value (DH)
- Filing manager
- ADVENT INTERNATIONAL, L.P.
- Reporting owner
- Advent International, L.P.
- Beneficially owned shares
- 62,493,676 shares
- Large-stake signal
-
Ownership
59%Beneficial ownership of this reported class.
Shares
62,493,676 sharesShares beneficially owned as disclosed.
Event date
01 Sep 2026Date tied to the ownership event or amendment.
Accepted by SEC
02 Sep 2026EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 59%
- Symbol
- DH
- Shares outstanding
- 106,753,803 shares
- SEC form
- SCHEDULE 13D
- Accepted by SEC
- 02 Sep 2026, 08:30:08 UTC
- Event date
- 01 Sep 2026
- Prior SEC filing
- 14 May 2026
- Source filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Names, identifiers, and filing context for this profile.
2 source fields
Source evidence
Original filing metadata and source links for verification.
5 source fields
Key filing fact
ADVENT INTERNATIONAL, L.P. disclosed 59% ownership in Definitive Healthcare Corp. Class A Common Stock, $0.001 par value (DH) on 01 Sep 2026.
Key facts
- ADVENT INTERNATIONAL, L.P. filed SCHEDULE 13D for Definitive Healthcare Corp. Class A Common Stock, $0.001 par value (DH).
- Disclosed ownership: 59%.
- Date of event: 01 Sep 2026.
Change
- Previous schedule filing date: 14 May 2026.
- Current filing was accepted on 02 Sep 2026, 08:30.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (4)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Advent International, L.P. | 59% | 62,493,676 | 0 | 62,493,676 | /s/ Neil Crawford | Neil Crawford / Senior Director, Fund Administration of Advent International GP, LLC, its General Partner | 0001034196 |
| Advent International GP, LLC | 59% | 62,493,676 | 0 | 62,493,676 | /s/ Neil Crawford | Neil Crawford / Senior Director, Fund Administration | |
| Advent International GPE IX Limited Partnership | 16% | 16,955,510 | 16,955,510 | 0 | /s/ Neil Crawford | Neil Crawford / Senior Director, Fund Administration of Advent International GP, LLC, its indirect General Partner | |
| Advent International GPE IX-H Limited Partnership | 5.1% | 5,428,915 | 5,428,915 | 0 | /s/ Neil Crawford | Neil Crawford / Senior Director, Fund Administration of Advent International GP, LLC, its indirect General Partner |
CIK / CUSIP context first