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QUEST DIAGNOSTICS INC (DGX)

Name: QUEST DIAGNOSTICS INC (DGX) — Institutional ownership, SEC filings and insider activity
Creator: Sightfile
License: https://www.sec.gov/privacy#dissemination

Institutional ownership, SEC filings and insider activity

Sector: Healthcare & Pharma · SEC CIK 0001022079 · EDGAR filings · Updated 2026-07-28

QUEST DIAGNOSTICS INC (DGX) has reported institutional ownership of 92.5%, with 1,058 institutional managers holding positions valued at $20.0B per the latest 13F reporting period.

Institutional ownership

92.5%

Institutional managers

1,058

Reported 13F value

$20.0B

Insider activity

150 trans.

−$42.4M net selling

Filings this week (11)

2026-07-28 — Notice of proposed sale filed (Form 144)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-27 — Insider transaction reported (Form 4)
2026-07-23 — Quarterly report (10-Q) filed
2026-07-23 — Current report (8-K) filed

Every filing links to the official SEC document. Real-time filing alerts for this company are available inside the app.

Latest updates

2026-07-02 — Insider transaction reported (Form 4)
2026-06-18 — 11-K filed
2026-06-08 — Insider transaction reported (Form 4)
2026-06-04 — Notice of proposed sale filed (Form 144)
2026-06-02 — Insider transaction reported (Form 4)
2026-06-01 — Notice of proposed sale filed (Form 144)
2026-05-21 — Insider transaction reported (Form 4)
2026-05-21 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, QUEST DIAGNOSTICS INC has 1,058 institutional holders and institutional ownership of 92.5%.

#	Institution	Reported value	% of tracked total
1	BlackRock, Inc.	$1.80B	9.0%
2	VANGUARD CAPITAL MANAGEMENT LLC	$1.40B	7.0%
3	PRICE T ROWE ASSOCIATES INC /MD/	$1.23B	6.2%
4	VANGUARD PORTFOLIO MANAGEMENT LLC	$1.19B	6.0%
5	STATE STREET CORP	$1.05B	5.3%
6	Boston Partners	$786.7M	3.9%
7	JPMORGAN CHASE & CO	$758.4M	3.8%
8	GEODE CAPITAL MANAGEMENT, LLC	$602.7M	3.0%
9	MORGAN STANLEY	$486.0M	2.4%
10	EdgePoint Investment Group Inc.	$439.8M	2.2%

Full holder history and quarter-over-quarter changes are available inside the app.

Insider activity

Insiders reported 150 transactions (0 buys, 53 sells) across 18 reporting insiders, with a net reported value of −$42.4M.

Quarterly net insider value, as reported in Form 4 filings.

Debt maturity schedule

Principal coming due by year for QUEST DIAGNOSTICS INC, from the company's own SEC prospectus filings (424B) tracked by Sightfile.

Year	Bond series maturing	Known principal due
2027	1	—
2029	3	—
2030	1	—
2031	1	—
2033	1	—
2034	1	—
2036	1	—
2045	1	—

Coupons, seniority and prospectus links for each series are available inside the app.

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See full history, cross-references and alerts on Sightfile

Sightfile provides information only — not investment advice, recommendations, or an assessment of any security. Data is derived from official public sources (SEC EDGAR and U.S. government agencies), may contain errors or delays, and should be verified against the source filing before relying on it.
Data sources: SEC EDGAR (filings, 13F, FTD), aggregated by Sightfile. Page updated 2026-07-28.