Gary M Pfeiffer insider trades: Quest Diagnostics (DGX) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Gary reports to the SEC
and 1 more company
Open-market buys and sales
10 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 26, 2026 | DGX | ↓ Sell | 1,203 | $243.00 | $292K | Direct | Oct 28, 2026 (2d) |
| Oct 22, 2025 | DGX | ↓ Sell | 1,482 | $182.40 | $270K | Direct | Oct 24, 2025 (2d) |
| Nov 12, 2018 | INAP | ↑ Buy | 10,000 | $6.56 | $66K | Direct | Nov 14, 2018 (2d) |
| Nov 15, 2016 | DGX | ↓ Sell | 42,643 | $85.09 | $3.6M | Direct | Nov 17, 2016 (2d) |
| Feb 4, 2015 | DGX | ↓ Sell | 8,000 | $72.43 | $579K | Direct | Feb 5, 2015 (1d) |
| Nov 10, 2014 | DGX | ↓ Sell | 10,000 | $61.69 | $617K | Direct | Nov 12, 2014 (2d) |
| May 7, 2014 | DGX | ↓ Sell | 10,000 | $55.95 | $560K | Direct | May 9, 2014 (2d) |
| Oct 25, 2013 | DGX | ↓ Sell | 2,000 | $58.10 | $116K | Direct | Oct 25, 2013 (0d) |
| Jan 17, 2013 | DGX | ↓ Sell | 10,000 | $60.00 | $600K | Direct | Jan 18, 2013 (1d) |
| May 2, 2012 | DGX | ↓ Sell | 10,000 | $58.30 | $583K | Direct | May 3, 2012 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other DGX insiders
Open-market trades in the last 12 months
About Gary M Pfeiffer's insider trades
Gary M Pfeiffer is a director at Quest Diagnostics (DGX). Since May 2, 2012, Gary has reported 1 open-market purchase worth $66K and 9 sales worth $7.2M on SEC Form 4. In the last 12 months: 1 sale ($292K).
Their filings also include grants and awards (67 filings), shares withheld for taxes (12 filings), option exercises (6 filings), other transactions (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every DGX insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.