Definitive Healthcare Corp
Ownership
Ownership Structure
Who owns Definitive Healthcare Corp (DH)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 34.9% of the shares are freely tradable; institutional investors hold 83.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Advent International LP | 58.55 | 62,493,676 | +0.0 | 06/30/2026 |
| The Goldman Sachs Group Inc | 5.66 | 6,043,900 | +1.7 | 03/31/2026 |
| BlackRock Inc | 2.80 | 2,985,567 | +2.8 | 03/31/2026 |
| D. E. Shaw & Co LP | 1.85 | 1,973,193 | -6.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 1.75 | 1,866,329 | +0.0 | 03/31/2026 |
| Kennedy Capital Management Inc | 1.63 | 1,737,044 | +0.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 1.36 | 1,453,209 | -12.8 | 06/30/2026 |
| Geode Capital Management, LLC | 1.11 | 1,179,694 | +21.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.24 | 1,327,702 | +0.0 | 08/31/2026 |
| Inspire Small/Mid Cap ETF | 0.85 | 907,051 | +0.0 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Heller Casey | Chief Financial Officer | 1,798,502 | 1,699,584 $ | Sep 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 1, 2026 | Heller Casey | Chief Financial Officer | Other | 41,093 | 0.9023 | 37,078 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.