Definitive Healthcare
119 hedge funds and large institutions have $109M invested in Definitive Healthcare in 2026 Q1 according to their latest regulatory filings, with 25 funds opening new positions, 40 increasing their positions, 34 reducing their positions, and 26 closing their positions.
18% more repeat investments, than reductions
Existing positions increased: 40 | Existing positions reduced: 34
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
4% less first-time investments, than exits
New positions opened: 25 | Existing positions closed: 26
1.89% less ownership
Funds ownership: 86.89% → 85% (-1.9%)
2% less funds holding
Funds holding: 122 → 119 (-3)
58% less capital invested
Capital invested by funds: $259M → $109M (-$149M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
+$449K |
| 2 |
Squarepoint
New York
|
+$417K |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
+$359K |
| 4 |
Acadian Asset Management
Boston,
Massachusetts
|
+$335K |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$249K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Morgan Stanley
New York
|
-$1.22M |
| 2 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$474K |
| 3 |
Dimensional Fund Advisors
Austin,
Texas
|
-$437K |
| 4 |
UBS Group
Zurich,
Switzerland
|
-$433K |
| 5 |
Verition Fund Management
Greenwich,
Connecticut
|
-$424K |
DH Hedge Fund Activity: Q1 2026 in Review
119 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Definitive Healthcare (DH) for Q1 2026, worth a combined $109M — down 58% from $259M a quarter earlier.
Sellers outnumbered buyers: 26 funds closed out of DH and 25 opened new positions — a net loss of 1 holder — while 34 trimmed existing stakes and 40 added.
The largest buyer was Millennium Management, adding an estimated $449K. The largest seller was Morgan Stanley, cutting an estimated $1.22M.
- 119 institutional investors held Definitive Healthcare (DH) as of Q1 2026, down from 122 in Q4 2025.
- Funds reported $109M of Definitive Healthcare stock for Q1 2026, down 58% quarter-over-quarter.
- 25 funds opened new Definitive Healthcare positions in Q1 2026 and 26 closed out, a net change of -1 holder.
- The largest Definitive Healthcare buyer in Q1 2026 was Millennium Management, an estimated $449K added.
- The largest Definitive Healthcare seller in Q1 2026 was Morgan Stanley, an estimated $1.22M sold.
Based on aggregated 13F filings for Q1 2026.