2026-07-23
Quest Diagnostics Inc. issued a press release on July 23, 2026, reporting its financial results for the quarter ended June 30, 2026. The press release is attached as Exhibit 99.1 to this 8-K filing.
View Full Filing (SEC EDGAR)Quest Diagnostics Inc
$240.80+1.9%
+$6.4B
Net Activity
+38.70% total shares
Institutions Holding
1107
Popularity Rank
#403
Avg Weight
0.13%
Total Value
$22.6B
1107 institutions currently hold DGX, with 547 net buyers and 435 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
435
Net Buying Institutions
547
Top 5 by Value
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Across its top 20 institutional holders, DGX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 6/100, avg. turnover score 33/100).
DGX ranks #403 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
1107 institutions disclose a position in DGX, but none treat it as a major bet — even M.D. Sass, LLC, its most concentrated holder, allocates just 5.0% of its own portfolio to it.
Boston Partners has added to its DGX position for two straight quarters, increasing it by $324.5M to reach $1.0B today.
Goldman Sachs Group Inc has trimmed its DGX position for two straight quarters, cutting it by $97.6M while still holding $208.3M.
DGX is up 1.9% today, and institutions have been net buyers of $6.4B this quarter — today's price move and the underlying institutional flow are pointing the same direction.
DGX posted net income of $1.1B over the trailing twelve months.
+$2.3B
Total Buy Value
$1.1B
Total Sell Value
547
Net Buyers
435
Net Sellers
DGX
Q2 2026
Top 5 Institutional Movers
Institutions accumulate heavily while insiders sell — signals diverge
Signal Basis
13F filings show institutions net-added approximately $6.37 billion in the latest quarter (546 buyers vs. 434 sellers, 112 new positions vs. 79 exits), with BlackRock and Vanguard among top holders; however, insiders executed zero buys over the trailing 90 days while selling roughly $5.89 million — all sales came from SVP & General Counsel Michael E Prevoznik, who sold approximately $5.51 million on August 28 alone.
Confirmation
A confirmed bullish case would require insider buying to emerge alongside continued institutional accumulation in the next filing cycle.
Invalidation Risk
If institutions reverse to net selling in the next quarter while insider selling intensifies, the bearish case strengthens materially.
Generated by AI directly from institutional holders' Form 13F data on SEC EDGAR, reflecting past activity only. Not investment advice — do not base trading decisions on this alone; verify against the source filings below.
See the institutional 13F filings behind this signalDGX does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | Michael E Prevoznik | 2026-08-28 | $3.89M |
| Sell | Michael E Prevoznik | 2026-08-28 | $1.52M |
| Sell | Michael E Prevoznik | 2026-08-28 | $105K |
| Sell | Mark E Delaney | 2026-07-28 | $376K |
| Sell | Doherty Catherine T. | 2026-03-05 | $1.15M |
| Sell | Michael E Prevoznik | 2026-03-05 | $800K |
| Sell | Patrick Plewman | 2026-03-05 | $589K |
| Sell | Karthik Kuppusamy | 2026-03-04 | $538K |
| Action | Member | Trade Date | Amount |
|---|---|---|---|
| Buy | Alan Armstrong Senate | 2026-03-30 | $1K–$15K |
| Buy | Alan Armstrong Senate | 2026-03-27 | $1K–$15K |
| Sell (Partial) | Thomas H Tuberville Senate | 2024-01-03 | $15K–$50K |
3
Filings (90d)
$8.32M
Total Est. Value
34K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Davis J. E. | 2026-09-01 | $2.43M |
| PREVOZNIK MICHAEL E | 2026-08-28 | $5.51M |
| DELANEY MARK E | 2026-07-28 | $376K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
0
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| T. Rowe Price Associates, Inc. | 13G/A | 2026-08-14 | 4.9% |
1
Filings (14d)
Quest Diagnostics Inc. issued a press release on July 23, 2026, reporting its financial results for the quarter ended June 30, 2026. The press release is attached as Exhibit 99.1 to this 8-K filing.
View Full Filing (SEC EDGAR)74834L100, 74834l100, 748356102
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Access DGX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/DGXCLI
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