Quest Diagnostics Inc (DGX): Congress and insider trades
Who in Congress and inside the company traded DGX, when each filing appeared, and what buying after each one would have earned against the S&P 500.
Key Facts
- Quest Diagnostics Inc (DGX) is a listed stock on NYSE.
- 10 members of Congress filed 14 buys and 25 sells of DGX, the latest published 2026-08-14 (14 August 2026).
- Insiders filed 0 open market buys worth $0 and 5 sells worth $12M, the latest filed 2026-09-03 (3 September 2026).
- Across 10 scored buys, Congress averaged +3.3% against the S&P 500 (SPY) over the 90 days after disclosure, with 60% of them ahead of the index. That result is not distinguishable from luck.
- Data as of 2026-09-29 (29 September 2026).
Congress trades in DGX
as of 2026-08-14| Filed | Member | Type | Size | Days to file | 90 day vs S&P |
|---|---|---|---|---|---|
| 14 Aug 2026 | Carol Miller (R-WV) | sell | 15K–50K | 521 | n/a |
| 6 Aug 2026 | Julie Johnson (D-TX) | sell | 1K–15K | 279 | n/a |
| 6 Aug 2026 | Julie Johnson (D-TX) | buy | 1K–15K | 279 | n/a |
| 21 Jul 2026 | Alan Armstrong (R-OK) | buy | 1K–15K | 116 | n/a |
| 21 Jul 2026 | Alan Armstrong (R-OK) | buy | 1K–15K | 113 | n/a |
| 12 Mar 2026 | Ro Khanna (D-CA) | sell | 1K–15K | 20 | n/a |
| 14 Jan 2026 | Julia Letlow (R-LA) | sell | 1K–15K | 173 | n/a |
| 14 Jan 2026 | Julia Letlow (R-LA) | buy | 1K–15K | 260 | -0.3% |
| 12 Dec 2025 | Julie Johnson (D-TX) | sell | 1K–15K | 38 | n/a |
| 10 Nov 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 8 | -18.1% |
| 9 Oct 2023 | Ro Khanna (D-CA) | sell | 1K–15K | 30 | n/a |
| 12 Jul 2023 | Ro Khanna (D-CA) | buy | 1K–15K | 12 | -9.7% |
| 14 Dec 2022 | Carol Miller (R-WV) | buy | 1K–15K | 29 | -10.9% |
| 15 Sep 2022 | Kathy Manning (D-NC) | sell | 1K–15K | 42 | n/a |
| 5 Sep 2022 | Carol Miller (R-WV) | buy | 15K–50K | 401 | +16.7% |
| 11 Aug 2022 | Kathy Manning (D-NC) | buy | 1K–15K | 21 | +16.3% |
| 19 Apr 2022 | Michael McCaul (R-TX) | sell | 100K–250K | 18 | n/a |
| 19 Apr 2022 | Michael McCaul (R-TX) | sell | 50K–100K | 18 | n/a |
| 4 Apr 2022 | Earl Blumenauer (D-OR) | buy | 1K–15K | 36 | +17.4% |
| 4 Apr 2022 | Earl Blumenauer (D-OR) | sell | 1K–15K | 18 | n/a |
| 11 Mar 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 19 | n/a |
| 24 Feb 2022 | Michael McCaul (R-TX) | sell | 15K–50K | 47 | n/a |
| 24 Feb 2022 | Michael McCaul (R-TX) | sell | 15K–50K | 47 | n/a |
| 24 Feb 2022 | Michael McCaul (R-TX) | sell | 1K–15K | 26 | n/a |
| 24 Feb 2022 | Michael McCaul (R-TX) | sell | 1K–15K | 26 | n/a |
| 9 Feb 2022 | Ro Khanna (D-CA) | sell | 1K–15K | 19 | n/a |
| 9 Feb 2022 | Ro Khanna (D-CA) | buy | 1K–15K | 18 | +12.2% |
| 28 Jan 2022 | Michael McCaul (R-TX) | sell | 1K–15K | 44 | n/a |
| 28 Jan 2022 | Michael McCaul (R-TX) | sell | 1K–15K | 44 | n/a |
| 5 Jan 2022 | Michael McCaul (R-TX) | sell | 15K–50K | 61 | n/a |
| 5 Jan 2022 | Michael McCaul (R-TX) | sell | 50K–100K | 61 | n/a |
| 8 Dec 2021 | Ro Khanna (D-CA) | sell | 1K–15K | 28 | n/a |
| 16 Oct 2021 | Tommy Tuberville (R-AL) | sell | 1K–15K | 16 | n/a |
| 16 Sep 2021 | Ro Khanna (D-CA) | buy | 1K–15K | 29 | +5.9% |
| 16 Sep 2021 | Ro Khanna (D-CA) | buy | 1K–15K | 40 | +5.9% |
| 24 Jul 2021 | Tommy Tuberville (R-AL) | buy | 1K–15K | 116 | +3.2% |
| 29 May 2021 | Sara Jacobs (D-CA) | sell | 50K–100K | 49 | n/a |
| 26 Jan 2021 | Michael McCaul (R-TX) | sell | 1K–15K | 42 | n/a |
| 26 Jan 2021 | Michael McCaul (R-TX) | sell | 1K–15K | 42 | n/a |
Nothing matches that search.
Insider trades in DGX
as of 2026-09-03| Filed | Insider | Type | Shares | Price | Value | 90 day vs S&P |
|---|---|---|---|---|---|---|
| 3 Sep 2026 | Davis J. E. | sell | 10,000 | $242.72 | $2.4M | n/a |
| 31 Aug 2026 | PREVOZNIK MICHAEL E | sell | 22,677 | $243.11 | $5.5M | n/a |
| 29 Jul 2026 | DELANEY MARK E | sell | 1,600 | $235.18 | $376K | n/a |
| 8 Jun 2026 | KUPPUSAMY KARTHIK | sell | 8,147 | $200.00 | $1.6M | n/a |
| 2 Jun 2026 | Davis J. E. | sell | 10,000 | $194.14 | $1.9M | n/a |
Nothing matches that search.
Related pages
Frequently asked questions
Who has bought DGX?
14 Congress buys by 10 members and 0 insider buys are on file. The tables on this page list every one.
Did buying DGX after a disclosure beat the market?
Across 10 scored buys, Congress averaged +3.3% against the S&P 500 (SPY) over the 90 days after disclosure, with 60% of them ahead of the index. That result is not distinguishable from luck. A single stock is a small sample.
Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.
Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.