Who owns Definitive Healthcare Corp. (DH)
Which tracked institutional funds hold DH, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See DH company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on DH is one-sided between 2025-Q4 and 2026-Q1: 1 added or opened and 28 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
DH’s largest tracked holder by dollar value, Advent International, L.P., sizes it at 1.8% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.8pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in DH divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 120 tracked filers holding DH, 65 increased or opened the position and 64 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in DH between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 1
- VANGUARD CAPITAL MANAGEMENT LLC$2M
Full exits 1
- VANGUARD GROUP INC$7M
Largest trims
- Advent International, L.P.$104M
- GOLDMAN SACHS GROUP INC$10M
- BlackRock, Inc.$5M
- DIMENSIONAL FUND ADVISORS LP$3M
- D. E. Shaw & Co., Inc.$3M
- MORGAN STANLEY$3M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Advent International, L.P. | 62,493,676 | $77M | 52.9% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 6,043,900 | $7M | 5.1% | 2026-Q1 |
| BlackRock, Inc. added | 2,985,567 | $4M | 2.5% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 2,099,551 | $3M | 1.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,866,329 | $2M | 1.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,666,369 | $2M | 1.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 1,179,694 | $1M | 1.0% | 2026-Q1 |
| STATE STREET CORP trimmed | 856,178 | $1M | 0.7% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 688,485 | $847K | 0.6% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 590,382 | $726K | 0.5% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 511,140 | $629K | 0.4% | 2026-Q1 |
| Inspire Investing, LLC trimmed | 468,181 | $576K | 0.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 435,884 | $536K | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 433,408 | $533K | 0.4% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 428,942 | $528K | 0.4% | 2026-Q1 |
| MORGAN STANLEY trimmed | 424,301 | $522K | 0.4% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 335,697 | $413K | 0.3% | 2026-Q1 |
| BARCLAYS PLC added | 326,480 | $402K | 0.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 299,473 | $368K | 0.3% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 123,390 | $354K | 0.2% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 286,661 | $353K | 0.2% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 260,606 | $321K | 0.2% | 2026-Q1 |
| Pinnacle Wealth Management Advisory Group, LLC trimmed | 260,000 | $320K | 0.2% | 2026-Q1 |
| PINNACLE ASSOCIATES LTD trimmed | 260,000 | $320K | 0.2% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 249,650 | $307K | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC added | 239,941 | $295K | 0.2% | 2026-Q1 |
| CLARK ESTATES INC/NY | 239,630 | $295K | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 233,581 | $287K | 0.2% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 203,322 | $249K | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 194,849 | $240K | 0.2% | 2026-Q1 |
| TOCQUEVILLE ASSET MANAGEMENT L.P. | 165,000 | $203K | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 164,146 | $202K | 0.1% | 2026-Q1 |
| Invesco Ltd. added | 121,558 | $150K | 0.1% | 2026-Q1 |
| Cambria Investment Management, L.P. added | 117,196 | $144K | 0.1% | 2026-Q1 |
| PANAGORA ASSET MANAGEMENT INC added | 114,580 | $141K | 0.1% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. added | 93,219 | $115K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 92,959 | $114K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 90,265 | $111K | 0.1% | 2026-Q1 |
| UBS Group AG trimmed | 77,620 | $95K | 0.1% | 2026-Q1 |
| Hillsdale Investment Management Inc. | 75,300 | $93K | 0.1% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 73,519 | $90K | 0.1% | 2026-Q1 |
| Flywheel Private Wealth LLC new | 67,743 | $83K | 0.1% | 2026-Q1 |
| Nuveen, LLC | 67,607 | $83K | 0.1% | 2026-Q1 |
| ALGERT GLOBAL LLC added | 61,758 | $76K | 0.1% | 2026-Q1 |
| BAKER TILLY WEALTH MANAGEMENT, LLC | 60,080 | $74K | 0.1% | 2026-Q1 |
| Irenic Capital Management LP trimmed | 58,088 | $71K | 0.0% | 2026-Q1 |
| IEQ CAPITAL, LLC added | 55,063 | $68K | 0.0% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 51,986 | $64K | 0.0% | 2026-Q1 |
| Valeo Financial Advisors, LLC | 51,582 | $63K | 0.0% | 2026-Q1 |
| Jefferies Financial Group Inc. | 50,000 | $62K | 0.0% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 45,513 | $56K | 0.0% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC new | 44,200 | $54K | 0.0% | 2026-Q1 |
| Hennion & Walsh Asset Management, Inc. trimmed | 43,455 | $53K | 0.0% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 3,136,876 | $9M | 6.2% | 2025-Q1 stale |
| PALISADE CAPITAL MANAGEMENT, LP trimmed | 2,142,782 | $9M | 6.0% | 2025-Q3 stale |
| VANGUARD GROUP INC trimmed | 2,526,079 | $7M | 5.0% | 2025-Q4 stale |
| Whetstone Capital Advisors, LLC new | 869,275 | $3M | 1.7% | 2025-Q1 stale |
| Corient Private Wealth LLC new | 450,017 | $2M | 1.3% | 2025-Q3 stale |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 108,240 | $439K | 0.3% | 2025-Q3 stale |
| Verition Fund Management LLC trimmed | 147,728 | $424K | 0.3% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 142,400 | $409K | 0.3% | 2025-Q4 stale |
| TEACHER RETIREMENT SYSTEM OF TEXAS new | 130,266 | $376K | 0.3% | 2025-Q1 stale |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC trimmed | 120,091 | $347K | 0.2% | 2025-Q1 stale |
| Walleye Capital LLC trimmed | 113,900 | $327K | 0.2% | 2025-Q4 stale |
| 272 Capital LP trimmed | 107,531 | $311K | 0.2% | 2025-Q1 stale |
| AXA S.A. new | 73,923 | $288K | 0.2% | 2025-Q2 stale |
| Swiss National Bank trimmed | 89,600 | $259K | 0.2% | 2025-Q1 stale |
| Graham Capital Management, L.P. added | 85,677 | $246K | 0.2% | 2025-Q4 stale |
| UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 81,358 | $235K | 0.2% | 2025-Q1 stale |
| CAXTON ASSOCIATES LLP trimmed | 57,237 | $232K | 0.2% | 2025-Q3 stale |
| Brooklyn Investment Group trimmed | 49,125 | $187K | 0.1% | 2025-Q3 stale |
| Brevan Howard Capital Management LP added | 54,034 | $155K | 0.1% | 2025-Q4 stale |
| Round Rock Advisors, LLC new | 36,200 | $147K | 0.1% | 2025-Q3 stale |
| AXA Investment Managers S.A. new | 34,934 | $142K | 0.1% | 2025-Q3 stale |
| DARK FOREST CAPITAL MANAGEMENT LP added | 36,224 | $141K | 0.1% | 2025-Q2 stale |
| Creative Planning added | 33,678 | $137K | 0.1% | 2025-Q3 stale |
| PRINCIPAL FINANCIAL GROUP INC added | 45,178 | $131K | 0.1% | 2025-Q1 stale |
| Glenmede Investment Management, LP added | 31,019 | $126K | 0.1% | 2025-Q3 stale |
| Allianz Asset Management GmbH added | 42,000 | $121K | 0.1% | 2025-Q1 stale |
| PharVision Advisers, LLC added | 41,769 | $120K | 0.1% | 2025-Q4 stale |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 27,126 | $110K | 0.1% | 2025-Q3 stale |
| Heron Bay Capital Management trimmed | 26,977 | $110K | 0.1% | 2025-Q3 stale |
| Thrivent Financial for Lutherans | 37,420 | $108K | 0.1% | 2025-Q1 stale |
| Massar Capital Management, LP new | 35,000 | $101K | 0.1% | 2025-Q1 stale |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. new | 34,934 | $100K | 0.1% | 2025-Q4 stale |
| Petrus Trust Company, LTA | 24,763 | $97K | 0.1% | 2025-Q2 stale |
| BOOTHBAY FUND MANAGEMENT, LLC trimmed | 32,168 | $92K | 0.1% | 2025-Q4 stale |
| MetLife Investment Management, LLC trimmed | 22,645 | $92K | 0.1% | 2025-Q3 stale |
| Quadrature Capital Ltd trimmed | 22,187 | $87K | 0.1% | 2025-Q2 stale |
| BANK OF MONTREAL /CAN/ | 18,756 | $76K | 0.1% | 2025-Q3 stale |
| Jain Global LLC trimmed | 26,197 | $75K | 0.1% | 2025-Q4 stale |
| Corebridge Financial, Inc. trimmed | 25,620 | $74K | 0.1% | 2025-Q1 stale |
| GLENMEDE TRUST CO NA added | 24,538 | $71K | 0.0% | 2025-Q1 stale |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 15,255 | $62K | 0.0% | 2025-Q3 stale |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 21,292 | $62K | 0.0% | 2025-Q1 stale |
| Strengthening Families & Communities, LLC | 20,519 | $59K | 0.0% | 2025-Q4 stale |
| Bayesian Capital Management, LP added | 14,100 | $55K | 0.0% | 2025-Q2 stale |
| Voya Investment Management LLC trimmed | 13,542 | $53K | 0.0% | 2025-Q2 stale |
| HSBC HOLDINGS PLC trimmed | 17,997 | $52K | 0.0% | 2025-Q1 stale |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 17,900 | $51K | 0.0% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.