Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

QUEST DIAGNOSTICS INC · common stock (filed as COM) · Q1 2026 · 14 members disclosed DGX ↗
13F filers reporting this class for the quarter ended 2026-03-31; 1–500 of 840 holders are listed, largest first
840
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$16.4B
holders whose share count rose or who opened the position (new + add), by shares
363
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
81
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of DGX ranked by reported value, 1–25 of 840 holders
#FilerReported valueSharesΔ sharesChange
1BlackRock, Inc.$1.8B9,172,292−286,926TRIM
2VANGUARD CAPITAL MANAGEMENT LLC$1.4B7,145,672—NO PRIOR
3VANGUARD PORTFOLIO MANAGEMENT LLC$1.2B6,081,400—NO PRIOR
4STATE STREET CORP$1.1B5,380,821−1,726TRIM
5Boston Partners$787M4,012,232+98,906ADD
6GEODE CAPITAL MANAGEMENT, LLC$603M3,086,308+58,101ADD
7MORGAN STANLEY$486M2,479,720−213,848TRIM
8EdgePoint Investment Group Inc.$440M2,243,869+582,797ADD
9DIMENSIONAL FUND ADVISORS LP$382M1,949,535+17,987ADD
10Grantham, Mayo, Van Otterloo & Co. LLC$369M1,883,024+66,964ADD
11VICTORY CAPITAL MANAGEMENT INC$362M1,846,336−280,086TRIM
12WELLS FARGO & COMPANY/MN$345M1,762,769−6,324TRIM
13BANK OF AMERICA CORP /DE/$344M1,752,902+129,964ADD
14Invesco Ltd.$321M1,638,487−28,492TRIM
15NORTHERN TRUST CORP$218M1,114,219+35,646ADD
16FMR LLC$185M942,218−260,036TRIM
17AMERICAN CENTURY COMPANIES INC$170M867,331−3,169TRIM
18UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$166M846,603−332TRIM
19AMERIPRISE FINANCIAL INC$158M807,477−5,977TRIM
20M&G Plc$158M805,341−139,711TRIM
21CHARLES SCHWAB INVESTMENT MANAGEMENT INC$149M760,790+9,736ADD
22Legal & General Group Plc$144M736,625−6,349TRIM
23Qube Research & Technologies Ltd$144M734,714+1,258ADD
24FIDUCIARY MANAGEMENT INC /WI/$141M720,986−325,935TRIM
25UBS Group AG$138M702,337−412,114TRIM
Show the top 500 of 840 holders
Truncated by Public Filings. Top 500 of 840 holders shown; the rest are on EDGAR. Method ↗
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · DGX

Congress · last 90 days

Buyers
1 Julie Johnson D–TX-32 $1K–$15K
Sellers
2 Carol D. Miller R–WV-1, Julie Johnson D–TX-32 $16K–$65K

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

Adding
1 Gotham Asset Management $25.6M held
Trimming
1 Bridgewater Associates $680K held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · QUEST DIAGNOSTICS INC

Merged timeline of congressional filings and notable-manager moves on DGX
DateWhoChangeSize
2026-08-13Carol D. Miller CongressSELL$15K–$50K
2026-08-05Julie Johnson CongressSELL$1K–$15K
2026-08-05Julie Johnson CongressBUY$1K–$15K
2026-05-15Gotham Asset Management 13FADD+51,382 sh
2026-05-15Bridgewater Associates 13FTRIM−47 sh

5 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.