QUEST DIAGNOSTICS INC
Total Trades
102
Buys
0
Sells
64
Largest Trade
N/A
Insiders
11
Institutional Funds
934
Inst. Value
$1M+
Activist Filings
9
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| PREVOZNIK MICHAEL E | SVP & General Coun… | SELL | $100K–$500K | 2K | $126.26 | Mar 1, 2022 |
| PREVOZNIK MICHAEL E | SVP & General Coun… | GRANT | N/A | 3K | — | Mar 1, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 934 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 5.4M | $1M+ | SH |
| Boston Partners | 3.0M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7M | $1M+ | SH |
| VICTORY CAPITAL MANAGEMENT INC | 2.0M | $1M+ | SH |
| EdgePoint Investment Group Inc. | 1.7M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.6M | $1M+ | SH |
| DAVIS SELECTED ADVISERS | 1.6M | $1M+ | SH |
| NORGES BANK | 1.3M | $1M+ | SH |
| FIDUCIARY MANAGEMENT INC /WI/ | 1.0M | $1M+ | SH |
| M&G Plc | 945K | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 871K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 751K | $1M+ | SH |
| ALLIANCEBERNSTEIN L.P. | 632K | $1M+ | SH |
| Squarepoint Ops LLC | 566K | $1M+ | SH |
| Artemis Investment Management LLP | 461K | $1M+ | SH |
| Pacer Advisors, Inc. | 448K | $1M+ | SH |
| CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM | 350K | $1M+ | SH |
| ENVESTNET ASSET MANAGEMENT INC | 334K | $1M+ | SH |
| CANADA LIFE ASSURANCE Co | 319K | $1M+ | SH |
| Advisors Capital Management, LLC | 314K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
T. Rowe Price Associates, Inc.
SC 13G/A · Aug 14, 2025
6.5%
7.2M shares
T. Rowe Price Associates, Inc.
SC 13G · May 14, 2025
5.4%
6.0M shares
SC 13G/A · Apr 17, 2025
8.4%
9.3M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
12.1%
13.6M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G/A · Jan 25, 2024
4.8%
0 shares
SC 13G/A · Jan 24, 2024
9.4%
10.6M shares
SC 13G/A · Jan 23, 2023
10.9%
12.4M shares
SC 13G/A · Apr 8, 2022
10.7%
12.8M shares
STATE STREET CORPORATION I.R.S. IDENTIFICATION NO. OF THE ABOVE PERSON 04-2456637
SC 13G · Feb 10, 2022
5.1%
0 shares