Quest Diagnostics
DGX
1,050 hedge funds and large institutions have $18.4B invested in Quest Diagnostics in 2025 Q4 according to their latest regulatory filings, with 149 funds opening new positions, 350 increasing their positions, 345 reducing their positions, and 90 closing their positions.
66% more first-time investments, than exits
New positions opened: 149 | Existing positions closed: 90
30% more call options, than puts
Call options by funds: $74.8M | Put options by funds: $57.4M
4% more funds holding
Funds holding: 1,006 → 1,050 (+44)
1.55% more ownership
Funds ownership: 93.86% → 95.41% (+1.5%)
1% more repeat investments, than reductions
Existing positions increased: 350 | Existing positions reduced: 345
8% less capital invested
Capital invested by funds: $20B → $18.4B (-$1.58B)
33% less funds holding in top 10
Funds holding in top 10: 3 → 2 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EIG
EdgePoint Investment Group
Toronto,
Ontario, Canada
|
+$148M |
| 2 |
Goldman Sachs
New York
|
+$117M |
| 3 |
UBS Group
Zurich,
Switzerland
|
+$82M |
| 4 |
Morgan Stanley
New York
|
+$74M |
| 5 |
D.E. Shaw & Co
New York
|
+$59.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
-$244M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$129M |
| 3 |
BlackRock
New York
|
-$98.8M |
| 4 |
Neuberger Berman Group
New York
|
-$86.4M |
| 5 |
Marshall Wace
London,
United Kingdom
|
-$84.5M |
DGX Hedge Fund Activity: Q4 2025 in Review
1,050 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in Quest Diagnostics (DGX) for Q4 2025, worth a combined $18.4B — down 7.9% from $20B a quarter earlier.
Buyers outnumbered sellers: 149 funds opened new DGX positions and 90 closed out — a net gain of 59 holders — while 350 added to existing stakes and 345 trimmed.
The largest buyer was EdgePoint Investment Group, adding an estimated $148M. The largest seller was Wellington Management Group, cutting an estimated $244M.
- 1,050 institutional investors held Quest Diagnostics (DGX) as of Q4 2025, up from 1,006 in Q3 2025.
- Funds reported $18.4B of Quest Diagnostics stock for Q4 2025, down 7.9% quarter-over-quarter.
- 149 funds opened new Quest Diagnostics positions in Q4 2025 and 90 closed out, a net change of +59 holders.
- The largest Quest Diagnostics buyer in Q4 2025 was EdgePoint Investment Group, an estimated $148M added.
- The largest Quest Diagnostics seller in Q4 2025 was Wellington Management Group, an estimated $244M sold.
Based on aggregated 13F filings for Q4 2025.