Quest Diagnostics ($DGX) Insider Trading & Smart Money Activity

Quest Diagnostics Incorporated · Diagnostics & Research · Latest filing Oct 7, 2026

Quest Diagnostics Incorporated ($DGX) has 5 congress trades, 5 13F position changes and 1 analyst rating on file.

Insider buyers (12 mo)

0

Insider sellers (12 mo)

0

Net insider $ (12 mo)

$0

Congress trades (12 mo)

4

13F moves on file

5

Analyst ratings on file

1

DGX insider buying and selling by quarter

Quarter	Insider buys	Insider sales	Congress buys / sales	13F added / cut
Q1 2026	0	0	2 / 0	0 / 0
Q2 2026	0	0	0 / 0	3 / 2
Q3 2026	0	0	0 / 0	0 / 0
Q4 2026	0	0	0 / 0	0 / 0

Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.

All DGX insider, congress, 13F and analyst activity

All Congress 13F Analysts

Date	Source	Who	Action	Shares	Value / amount	ΔOwn	1W	1M	6M	Filing	Story
Oct 7, 2026	Analyst	Barclays	Reiterates to Overweight		PT $260						—
May 15, 2026	13F	Woodline Partners	Added	+252.37K sh	$125.84M						—
May 14, 2026	13F	Canada Life Assurance	Reduced	-13.60K sh	$64.79M						—
May 14, 2026	13F	Canada Life Assurance	Reduced	-13.60K sh	$62.31M						—
May 11, 2026	13F	Boston Partners	Added	+98.91K sh	$853.16M						—
May 11, 2026	13F	Boston Partners	Added	+98.91K sh	$817.81M						—
Mar 30, 2026	Congress	Alan Armstrong	Purchase		$1,001 - $15,000						—
Mar 27, 2026	Congress	Alan Armstrong	Purchase		$1,001 - $15,000						—
Oct 30, 2025	Congress	Julie Johnson	Sale		$1,001 - $15,000						—
Oct 30, 2025	Congress	Julie Johnson	Purchase		$1,001 - $15,000						—
Mar 10, 2025	Congress	Carol D. Miller	Sale		$15,001 - $50,000						—

1W / 1M / 6M = how DGX moved from the trade or filing date.

Members of Congress trading DGX

• Alan Armstrong2
• Julie Johnson2
• Carol D. Miller1

Institutions moving DGX (13F)

• Canada Life Assurance2
• Boston Partners2
• Woodline Partners1

Analyst ratings on DGX

Date	Firm	Action	Rating	Price target	1W	1M	6M	Story
Oct 7, 2026	Barclays	Reiterates	Overweight	$250 → $260				—

Frequently asked questions

Which members of Congress traded DGX?

5 disclosed trades by Alan Armstrong, Julie Johnson and Carol D. Miller. The latest was on Mar 30, 2026.

Which institutions changed their DGX positions?

Recent 13F filers moving the stock include Canada Life Assurance, Boston Partners and Woodline Partners.

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Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.