Transactions
3
Insider / QUEST DIAGNOSTICS INC
PFEIFFER GARY M
Director at QUEST DIAGNOSTICS INC
- Company
- QUEST DIAGNOSTICS INC
- Ticker
- DGX
- First filing on record
- October 24, 2025
- Latest trade on record
- May 20, 2026
- SEC filings
- EDGAR ↗
PFEIFFER GARY M, Director at QUEST DIAGNOSTICS INC, has disclosed 3 transactions in DGX since October 24, 2025: 0 purchases (0 open-market buys) and 1 sale, worth about $1.1M at the reported prices. The latest was filed May 21, 2026, 1 day after the trade.
Open-market buys
0
Sales
1
Avg. disclosure lag
1.3d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months PFEIFFER GARY M made no purchases and 1 sale worth $270K, plus 2 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
PFEIFFER GARY M has traded 1 stock on record; the largest by dollars is DGX.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 2 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| A | Grant or award | 1 | 1,142 | — |
| I | Discretionary transaction | 1 | 4,413 | $841K |
| S | Open-market sale | 1 | 1,482 | $270K |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 1 | 0 | 0 |
| 2025 | 2 | 0 | 1 · $270K |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| DGX | Other A | May 20, 2026 | May 21, 2026 | 1d | 1,142 | — | — | Form 4 ↗ | ||
| DGX | Other I | October 23, 2025 | October 24, 2025 | 1d | 4,413 | $191 | $841K | derivative | Form 4 ↗ | |
| DGX | Sell S | October 22, 2025 | October 24, 2025 | 2d | 1,482 | $182 | $270K | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| May 21, 2026 | Form 4 | 0001127304-26-000002 | 1 | published | EDGAR ↗ |
| October 24, 2025 | Form 4 | 0001022079-25-000228 | 2 | published | EDGAR ↗ |
Other insiders at QUEST DIAGNOSTICS INC
- DELANEY MARK E SVP & Chief Commercial Officer 17 rows
- Doherty Catherine T. EVP, Regional Businesses 17 rows
- Plewman Patrick SVP for Diagnostic Services 17 rows
- Davis J. E. CEO and President 16 rows
- KUPPUSAMY KARTHIK SVP, Clinical Solutions 16 rows
- PREVOZNIK MICHAEL E SVP & General Counsel 16 rows
- SAMAD SAM Executive Vice President & CFO 13 rows
- Lassiter Wright III Director 11 rows
- Deppe Michael J SVP, Corp. Controller & CAO 7 rows
- Gregg Vicky B Director 6 rows
Everyone on file, with contracts and lobbying under the company's name: QUEST DIAGNOSTICS INC.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 2 | 3 | October 24, 2025 | May 21, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.