Latest filingSep 03, 2026Most recent Form 4
DGX
QUEST DIAGNOSTICS INC
NYSEHealthcareServices-Medical Laboratories
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$794M4 sells
Net open-market-$794M2 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period7transactions
- S · Open-market sells · dominant4 · 57%
- M · Option exercise2 · 29%
- G · Gifts1 · 14%
Activity by reported role
A joint filing can contribute to multiple roles14transactions
- GC · dominant6 · 43%
- SVP6 · 43%
- Chief executive officer1 · 7%
- PRES1 · 7%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (1)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typePrevoznik Michael ECommon Stock · Direct
37,987Aug 28, 2026
Prevoznik Michael ENon-Qualifed Stock Option (right to buy) · Direct
0Aug 28, 2026
Davis J. E.Common Stock · Direct
122,423Sep 01, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
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Top insiders
By absolute net value across the selected period- PE-$5.5M
- DE-$2.4M
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
DGX transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| DGX | Davis J. E. | CEOPRES | sale10b5-1 | 10.0k | -$242M | S | — | 0.0% | 09/03 | 09/01 |
| DGX | PREVOZNIK MICHAEL E | SVPGC | sale10b5-1 | 430 | -$10.5M | S | 0.0% | 08/31 | 08/28 | |
| DGX | PREVOZNIK MICHAEL E | SVPGC | sale10b5-1 | 6.23k | -$151M | S | 0.0% | 08/31 | 08/28 | |
| DGX | PREVOZNIK MICHAEL E | SVPGC | sale10b5-1 | 16.0k | -$388M | S | 0.0% | 08/31 | 08/28 |
QUEST DIAGNOSTICS INC Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at QUEST DIAGNOSTICS INC?
Davis J. E., PREVOZNIK MICHAEL E.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Davis J. E. reported a sale on Sep 01, 2026 valued at $242M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $7,940,282.84. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.