DEFINITIVE HEALTHCARE CORP DH
CLASS A COM · Common Stock · CUSIP 24477E103
- SectorTechnology
- IndustryServices-Prepackaged Software
- HeadquartersFramingham, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($332.8k this quarter). Holder counts are more reliable. Shares outstanding: 107.3m as of 2025-05-05, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $2.89. Options: 4 managers hold calls ($37.7k notional), 2 hold puts ($19.7k).
Trends to Q1 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 123 |
| Q4 2022 | 138 |
| Q1 2023 | 146 |
| Q2 2023 | 138 |
| Q3 2023 | 135 |
| Q4 2023 | 139 |
| Q1 2024 | 144 |
| Q2 2024 | 145 |
| Q3 2024 | 126 |
| Q4 2024 | 129 |
| Q1 2025 | 137 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2023 | 93 | 60 |
| Q3 2023 | 73 | 57 |
| Q4 2023 | 69 | 61 |
| Q1 2024 | 83 | 60 |
| Q2 2024 | 90 | 72 |
| Q3 2024 | 59 | 78 |
| Q4 2024 | 66 | 55 |
| Q1 2025 | 72 | 63 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2024 | $1.1m | $3.8k | 0.00 |
| Q3 2024 | $39.9k | $25.0k | 0.63 |
| Q4 2024 | $133.8k | $17.3k | 0.13 |
| Q1 2025 | $37.7k | $19.7k | 0.52 |
Biggest buyers
| GOLDMAN SACHS GROUP INC | Added | +7.4m |
| Whetstone Capital Advisors, LLC | New | +869.3k |
| MORGAN STANLEY | Added | +547.0k |
| Pinnacle Wealth Management Advisory Group, LLC | New | +260.0k |
| PINNACLE ASSOCIATES LTD | New | +260.0k |
| UBS Group AG | Added | +227.9k |
| AQR CAPITAL MANAGEMENT LLC | Added | +213.6k |
| VICTORY CAPITAL MANAGEMENT INC | Added | +187.8k |
| D. E. Shaw & Co., Inc. | Added | +161.3k |
| Cubist Systematic Strategies, LLC | Added | +138.6k |
Biggest sellers
| Irenic Capital Management LP | Sold out | -7.0m |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Reduced | -1.8m |
| ArrowMark Colorado Holdings LLC | Sold out | -998.1k |
| VANGUARD GROUP INC | Reduced | -869.4k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -740.5k |
| 272 Capital LP | Reduced | -570.4k |
| CITADEL ADVISORS LLC | Reduced | -412.6k |
| BOOTHBAY FUND MANAGEMENT, LLC | Sold out | -382.5k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -279.7k |
| Sone Capital Management, LLC | Sold out | -231.8k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $34.1k11.8k shares |
| GROUP ONE TRADING LLC | Reduced | $2.6k900 shares |
| SIMPLEX TRADING, LLC | Unchanged | $1.0k400 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $19.7k6.8k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
ADVENT INTERNATIONAL, L.P.
13D · may seek influence
no change · filed 2026-10-01
Stated purposeItem 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 Iss… Full filing |
58.5% |
Krantz Jason Ronald
13D · may seek influence
+0.7 pts · filed 2026-09-02
Stated purposeSince 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 … Full filing |
17.6% |
| GOLDMAN SACHS GROUP INC 13G · institution -2.0 pts · filed 2026-02-09 | 5.7% |
Insider purchases and sales in Q1 2025
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2023 | 0 | — | 1 | $56.8k | — |
| Q3 2023 | 0 | — | 1 | $62.5k | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 1 | $211.5k | — |
| Q1 2025 | 0 | — | 0 | — | — |
None reported in Q1 2025.
Holders, Q1 2025
| Manager | Shares | Change |
|---|---|---|
| Advent International, L.P. 5.72% of their portfolio | 62.5m $180.6m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 8.7m $25.2m | Added +7.4m |
| BlackRock, Inc. 0.00% of their portfolio | 4.1m $11.8m | Reduced -171.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 3.8m $11.1m | Reduced -869.4k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.00% of their portfolio | 3.1m $9.1m | Reduced -1.8m |
| PALISADE CAPITAL MANAGEMENT, LP 0.19% of their portfolio | 2.3m $6.5m | Added +29.8k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 2.0m $5.7m | Added +103.3k |
| STATE STREET CORP 0.00% of their portfolio | 1.4m $4.0m | Reduced -4.9k |
| MORGAN STANLEY 0.00% of their portfolio | 1.3m $3.8m | Added +547.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.2m $3.6m | Reduced -31.0k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 871.1k $2.5m | Added +161.3k |
| Whetstone Capital Advisors, LLC 1.11% of their portfolio | 869.3k $2.5m | New |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 763.4k $2.2m | Reduced -8.4k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 621.8k $1.8m | Added +4.3k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 590.1k $1.7m | Added +213.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 461.6k $1.3m | Reduced -35.7k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 458.9k $1.3m | Added +38.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 376.6k $1.1m | Added +45.3k |
| UBS Group AG 0.00% of their portfolio | 307.7k $889.2k | Added +227.9k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 299.7k $866.2k | Reduced -279.7k |
| TOCQUEVILLE ASSET MANAGEMENT L.P. 0.01% of their portfolio | 265.0k $765.9k | Added +65.0k |
| PINNACLE ASSOCIATES LTD 0.01% of their portfolio | 260.0k $751.4k | New |
| Pinnacle Wealth Management Advisory Group, LLC 0.07% of their portfolio | 260.0k $751.4k | New |
| Connor, Clark & Lunn Investment Management Ltd. 0.00% of their portfolio | 250.2k $722.9k | Added +103.5k |
| CLARK ESTATES INC/NY 0.15% of their portfolio | 239.6k $692.5k | Reduced -91.5k |
| ALGERT GLOBAL LLC 0.02% of their portfolio | 237.1k $685.1k | Reduced -15.4k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 223.9k $647.2k | Added +187.8k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 223.9k $647.1k | Reduced -5.2k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 216.0k $624.2k | Reduced -69.6k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 197.0k $569.3k | Added +7.8k |
| Cubist Systematic Strategies, LLC 0.01% of their portfolio | 144.3k $417.0k | Added +138.6k |
| Verition Fund Management LLC 0.00% of their portfolio | 131.8k $381.0k | Added +103.1k |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.00% of their portfolio | 130.3k $376.5k | New |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 125.5k $362.7k | Added +80.1k |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio | 120.1k $347.1k | Reduced -167.3k |
| PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio | 113.5k $327.9k | Added +66.4k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 111.9k $323.4k | First filing |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 111.5k $322.1k | Reduced -412.6k |
| XTX Topco Ltd 0.02% of their portfolio | 107.7k $311.1k | Reduced -10.8k |
| 272 Capital LP 0.82% of their portfolio | 107.5k $310.8k | Reduced -570.4k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 105.1k $303.8k | Added +65.6k |
| Nuveen, LLC 0.00% of their portfolio | 103.7k $299.6k | First filing |
| Graham Capital Management, L.P. 0.01% of their portfolio | 102.6k $296.5k | Added +16.8k |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 101.3k $292.8k | Added +27.7k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 92.5k $267.3k | Reduced -64.5k |
| Swiss National Bank 0.00% of their portfolio | 89.6k $258.9k | Reduced -13.7k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 88.9k $256.9k | Unchanged |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 81.4k $235.1k | Unchanged |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 76.6k $221.4k | Reduced -4.7k |
| Quadrature Capital Ltd 0.00% of their portfolio | 75.0k $217.4k | New |
| STIFEL FINANCIAL CORP 0.00% of their portfolio | 74.3k $214.8k | Added +58.2k |
| BARCLAYS PLC 0.00% of their portfolio | 62.2k $179.7k | Reduced -29.1k |
| Invesco Ltd. 0.00% of their portfolio | 61.9k $178.8k | Added +10.0k |
| BAKER TILLY WEALTH MANAGEMENT, LLC 0.07% of their portfolio | 60.1k $173.6k | Added +9.7k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 59.8k $173.0k | Added +2.5k |
| Valeo Financial Advisors, LLC 0.00% of their portfolio | 59.2k $171.2k | Added +107 |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 55.7k $160.9k | Added +22.7k |
| PDT Partners, LLC 0.01% of their portfolio | 52.5k $151.6k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 49.2k $142.2k | Unchanged |
| Hennion & Walsh Asset Management, Inc. 0.01% of their portfolio | 46.8k $135.3k | Reduced -4.1k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 45.2k $130.6k | Added +1.2k |
| TWO SIGMA SECURITIES, LLC 0.02% of their portfolio | 45.1k $130.3k | Added +31.4k |
| Allianz Asset Management GmbH 0.00% of their portfolio | 42.0k $121.4k | Added +17.3k |
| Centiva Capital, LP 0.01% of their portfolio | 41.0k $118.4k | New |
| CITIGROUP INC 0.00% of their portfolio | 38.8k $112.1k | Reduced -5.0k |
| Jain Global LLC 0.00% of their portfolio | 38.6k $111.7k | New |
| Legal & General Group Plc 0.00% of their portfolio | 37.4k $108.2k | Unchanged |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 37.4k $108.0k | Unchanged |
| Massar Capital Management, LP 0.12% of their portfolio | 35.0k $101.2k | New |
| Walleye Capital LLC 0.00% of their portfolio | 33.1k $95.6k | Reduced -12.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 32.4k $93.7k | Reduced -740.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 31.4k $90.7k | Added +91 |
| MARTINGALE ASSET MANAGEMENT L P 0.00% of their portfolio | 30.1k $87.0k | New |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 29.5k $85.2k | Added +11.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 28.7k $83.0k | Reduced -4.8k |
| FMR LLC 0.00% of their portfolio | 27.1k $78.4k | Added +22.3k |
| MEEDER ASSET MANAGEMENT INC 0.01% of their portfolio | 26.5k $76.5k | New |
| Corebridge Financial, Inc. 0.00% of their portfolio | 25.6k $74.0k | Reduced -890 |
| State of Wyoming 0.01% of their portfolio | 25.5k $73.7k | Reduced -10.6k |
| Petrus Trust Company, LTA 0.01% of their portfolio | 24.8k $71.6k | New |
| GLENMEDE TRUST CO NA 0.00% of their portfolio | 24.5k $70.9k | Added +1.5k |
| SG Americas Securities, LLC 0.00% of their portfolio | 22.1k $64.0k | Reduced -5.1k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 22.0k $63.5k | Reduced -231 |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 21.4k $62.0k | Added +793 |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 21.3k $61.5k | Unchanged |
| Creative Planning 0.00% of their portfolio | 20.2k $58.4k | Added +7.6k |
| Heron Bay Capital Management 0.01% of their portfolio | 20.0k $57.9k | Reduced -1.7k |
| Cerity Partners LLC 0.00% of their portfolio | 19.4k $56.2k | New |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 18.9k $54.6k | Added +6.6k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 18.0k $52.3k | New |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 16.4k $48.4k | Unchanged |
| DARK FOREST CAPITAL MANAGEMENT LP 0.00% of their portfolio | 16.3k $47.1k | New |
| Brevan Howard Capital Management LP 0.00% of their portfolio | 15.3k $44.1k | New |
| ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio | 13.2k $38.2k | Reduced -2.0k |
| KLP KAPITALFORVALTNING AS 0.00% of their portfolio | 13.2k $38.1k | Unchanged |
| Point72 Asia (Singapore) Pte. Ltd. 0.01% of their portfolio | 13.0k $37.6k | Added +7.6k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 12.9k $37.3k | Unchanged |
| CIBC WORLD MARKETS CORP 0.00% of their portfolio | 11.6k $33.5k | New |
| AXQ CAPITAL, LP 0.01% of their portfolio | 11.3k $32.8k | New |
| ProShare Advisors LLC 0.00% of their portfolio | 11.3k $32.7k | Reduced -3.7k |