Stocks › DGX
QUEST DIAGNOSTICS INC
DGX·NYSE·
United States·USD
United States·USD$228.39
-3.83 (-1.65%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
DGX
QUEST DIAGNOSTICS INC · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
DGXS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of DGX by members of U.S. Congress · 121 on record · 10 in the last 12 months
Whale Activity
Position changes in DGX reported for 2026-09-30 by 2 tracked institutional filers
- Increased0
- New0
- Held0
- Decreased0
- Closed0
- No prior filing2
| Filer | Shares | Value | Change |
|---|---|---|---|
| EASTERN BANK | 207.7K | $48.4M | — |
| Byrne Asset Management LLC | 5,073 | $1.2M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by DGX insiders, by quarter · Form 4
Recent Insider Transactions
2,063 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Davis J. E.CEO and President · Director | Sale | −10.0K | $242.72 | $2.4M | Sep 1, 2026 | Form 4 ↗ |
| PREVOZNIK MICHAEL ESVP & General Counsel | Sale | −6,237 | $243.63 | $1.5M | Aug 28, 2026 | Form 4 ↗ |
| PREVOZNIK MICHAEL ESVP & General Counsel | Sale | −430 | $244.51 | $105K | Aug 28, 2026 | Form 4 ↗ |
| PREVOZNIK MICHAEL ESVP & General Counsel | Sale | −16.0K | $242.88 | $3.9M | Aug 28, 2026 | Form 4 ↗ |
| DELANEY MARK ESVP & Chief Commercial Officer | Sale | −1,600 | $235.18 | $376K | Jul 28, 2026 | Form 4 ↗ |
| KUPPUSAMY KARTHIKSVP, Clinical Solutions | Sale | −8,147 | $200.00 | $1.6M | Jun 4, 2026 | Form 4 ↗ |
| KUPPUSAMY KARTHIKSVP, Clinical Solutions | Option exercise | +4,827 | $121.81 | $588K | Jun 4, 2026 | Form 4 ↗ |
| KUPPUSAMY KARTHIKSVP, Clinical Solutions | Option exercise | +3,320 | $127.73 | $424K | Jun 4, 2026 | Form 4 ↗ |
| Davis J. E.CEO and President · Director | Sale | −10.0K | $194.14 | $1.9M | Jun 1, 2026 | Form 4 ↗ |
| Lassiter Wright IIIDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| Diaz LuisDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| Doi TraceyDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| Gregg Vicky BDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| WENTWORTH TIMOTHY CDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| MORRISON DENISE MDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| RING TIMOTHY MDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| CARTER ROBERT BDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| MAIN TIMOTHY LDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| PFEIFFER GARY MDirector | Grant / award | +1,142 | $0.00 | $0 | May 20, 2026 | Form 4 ↗ |
| SAMAD SAMExecutive Vice President & CFO | Grant / award | +108 | $194.70 | $21K | Apr 20, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding DGX · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 3.5M | $744.9M | 0.03% | Jun 30, 2026 |
| VANGUARD 500 INDEX FUND VANGUARD INDEX FUNDS | 2.9M | $607.9M | 0.04% | Jun 30, 2026 |
| VANGUARD MID-CAP INDEX FUND VANGUARD INDEX FUNDS | 2.4M | $508.4M | 0.23% | Jun 30, 2026 |
| iShares Core S&P 500 ETF iShares Trust | 1.5M | $322.0M | 0.04% | Jun 30, 2026 |
| State Street(R) SPDR(R) S&P 500(R) ETF Trust | 1.3M | $284.3M | 0.04% | Jun 30, 2026 |
| Fidelity 500 Index Fund Fidelity Concord Street Trust | 1.4M | $274.4M | 0.03% | May 31, 2026 |
| Disciplined Value Mid Cap Fund John Hancock Funds III | 1.2M | $259.2M | 1.12% | Jun 30, 2026 |
| JPMorgan Equity Income Fund JPMorgan Trust II | 1.2M | $244.4M | 0.56% | Jun 30, 2026 |
| T. Rowe Price Dividend Growth Fund, Inc. | 1.1M | $235.1M | 0.99% | Jun 30, 2026 |
| Disciplined Value Fund John Hancock Funds III | 1.1M | $225.7M | 1.15% | Jun 30, 2026 |
Mutual funds and ETFs whose N-PORT filings list DGX's shares (CUSIP 74834L100), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming quest diagnostics as client
- FEDERAL STREET STRATEGIES, LLCQUEST DIAGNOSTICS INCORPORATED · 2026 Q2 · HCR, MMM$50K
Filing ↗ - QUEST DIAGNOSTICS INCORPORATEDQUEST DIAGNOSTICS INCORPORATED · 2026 Q2 · BUD, HCR, MMM$470K
Filing ↗ - RED+BLUE STRATEGIESQUEST DIAGNOSTICS INCORPORATED · 2026 Q2 · HCR$80K
Filing ↗ - TARPLIN, DOWNS & YOUNG, LLCQUEST DIAGNOSTICS · 2026 Q2 · HCR, MMM, BUD$60K
Filing ↗ - FEDERAL STREET STRATEGIES, LLCQUEST DIAGNOSTICS INCORPORATED · 2026 Q1 · HCR, MMM$50K
Filing ↗
Government Contracts
Federal awards to quest diagnostics · USAspending
$135.3MAwarded · 230 contracts on record
- Department of Veterans AffairsREFERENCE LAB TESTS$2.1M
Oct 1, 2026 · ↗ - Department of Veterans AffairsREFERENCE LAB TESTS$2.0M
Oct 1, 2026 · ↗ - Department of Veterans AffairsREFERENCE LAB TESTS TASK ORDER AGAINST OPTION PERIOD 4$785K
Oct 1, 2026 · ↗ - Department of Veterans AffairsFY27 TASK ORDER. EO 14398 REQUIREMENT.$1.3M
Oct 1, 2026 · ↗ - Department of Veterans AffairsFY27 QUEST TASK ORDER. EO 14398 REQUIREMENT.$1.2M
Oct 1, 2026 · ↗ - Department of Veterans AffairsFY27 QUEST TASK ORDER. EO 14398 REQUIREMENT.$978K
Oct 1, 2026 · ↗ - Department of Veterans AffairsREFERENCE LAB TESTS$1.5M
Oct 1, 2026 · ↗ - Department of Veterans AffairsREFERENCE LABORATORY$750K
Oct 1, 2026 · ↗
U.S. Patents
Recent USPTO applications naming QUEST DIAGNOSTICS INC
No USPTO patent applications found for QUEST DIAGNOSTICS INC.
Annual Financials
From DGX's 10-K filings · XBRL
No annual XBRL figures on record for DGX. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
- 2-for-1Stock splitJun 21, 2005
- 2-for-1Stock splitJun 1, 2001
Split dates and ratios from the price history · Close Prices from Tiingo.com
About QUEST DIAGNOSTICS INC
From SEC EDGAR company records
Industry (SIC 8071)Services-Medical Laboratories
SectorHealthcare
HeadquartersSECAUCUS, NJ
IncorporatedDE
SEC CIK0001022079 ↗
Former namesCORNING CLINICAL LABORATORIES INC