// company-profile
Quest Diagnostics Inc
DGXExchangeNYSESectorServices-Medical LaboratoriesInc.DEFilings244Insiders20
// api This Quest Diagnostics Inc insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
Mixed insider activity over the last 30 days: 0 purchases and 0 sales (0 transactions total).
// 90-day insight
Over the last 90 days, Quest Diagnostics Inc insiders bought $34K across 13 transactions with no open-market sales.
- Most active insider: KUPPUSAMY KARTHIK with 6 transactions totaling $3.7M.
- Largest single sale: $1.9M by Davis J. E. on Jun 1, 2026.
- 100% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Quest Diagnostics Inc as of 2026-03-31
Total reported AUM
$16.17B
QoQ change
+6.1%
Reporting period
2026-03-31
#1
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$1.40B
7.1M shares
#2
STATE STREET CORP
CIK 93751
$1.05B
5.4M shares
#3
BlackRock, Inc.
CIK 2012383
$718.4M
3.7M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 4, 2026 | KUPPUSAMY KARTHIK | DGX | Option Exercise10b5 | 3,320 | $127.72 | $424K |
| Jun 4, 2026 | KUPPUSAMY KARTHIK | DGX | Sale10b5 | 8,147 | $200.00 | $1.63M |
| Jun 4, 2026 | KUPPUSAMY KARTHIK | DGX | Option Exercise10b5 | 4,827 | $121.81 | $588K |
| Jun 4, 2026 | KUPPUSAMY KARTHIK | DGX | Option Exercise10b5 | 4,827 | $121.81 | $588K |
| Jun 4, 2026 | KUPPUSAMY KARTHIK | DGX | Option Exercise10b5 | 3,320 | $127.72 | $424K |
45 more transactions hidden
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