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Equibles

CITADEL ADVISORS LLC

Position in DGX — Quest Diagnostics Inc

CIK 1423053 MIAMI, FL
Back to DGX Full portfolio

Position in DGX

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$68,047,783
-$5,743,419 QoQ
Shares Held
347,218
-18.3% QoQ
Ownership
0.314%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in DGX Over Time

Shares Held

Position Value (USD)

Derivatives in DGX

reported options exposure · as of Mar 31, 2026
CallValue
$22,145,740
CallShares
113,000
PutValue
$5,742,214
PutShares
29,300

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Diagnostics & Research

Healthcare · as of Mar 31, 2026

CITADEL ADVISORS LLC holds $1,657,068,556 across 34 Diagnostics & Research names. DGX ranks #7 (4.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 TMO
Thermo Fisher Scientific Inc.
 864,489 $424,922,277
2 CRL
Charles River Laboratories International, Inc.
 1,212,152 $209,096,220
3 A
Agilent Technologies, Inc.
 1,801,714 $205,359,361
4 DHR
Danaher Corp /De/
 1,026,347 $194,595,390
5 MTD
Mettler Toledo International Inc/
 58,054 $73,217,704
6 GH
Guardant Health, Inc.
 775,941 $71,673,669
7 DGX
Quest Diagnostics Inc
This page 		347,218 $68,047,783
8 IQV
Iqvia Holdings Inc.
 390,042 $66,517,762

All Filings in DGX

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $5,742,214 29,300
2026-03-31 $68,047,783 347,218
2026-03-31 $22,145,740 113,000
2025-12-31 $73,791,202 425,236
2025-12-31 $8,207,969 47,300
2025-12-31 $5,622,372 32,400
2025-09-30 $24,892,416 130,614
2025-09-30 $11,606,322 60,900
2025-09-30 $6,918,054 36,300
2025-06-30 $5,046,704 28,095
2025-06-30 $7,472,608 41,600
2025-06-30 $14,029,103 78,100
2025-03-31 $23,018,475 136,043
2025-03-31 $15,177,240 89,700
2025-03-31 $14,398,920 85,100
2024-12-31 $10,333,910 68,500
2024-12-31 $3,620,640 24,000
2024-09-30 $116,147,647 748,133
2024-09-30 $5,402,700 34,800
2024-09-30 $13,134,150 84,600
2024-06-30 $159,759,081 1,167,147
2024-06-30 $16,466,664 120,300
2024-06-30 $4,161,152 30,400
2024-03-31 $21,776,796 163,600
2024-03-31 $13,311,000 100,000
2024-03-31 $19,814,887 148,861
2023-12-31 $27,772,340 201,424
2023-12-31 $17,290,152 125,400
2023-12-31 $15,883,776 115,200
2023-09-30 $17,048,214 139,900
2023-09-30 $9,096,726 74,649
2023-09-30 $6,300,162 51,700
2023-06-30 $11,582,144 82,400
2023-06-30 $17,930,255 127,563
2023-06-30 $7,463,736 53,100
2023-03-31 $24,831,579 175,513
2023-03-31 $12,421,944 87,800
2023-03-31 $17,996,256 127,200
2022-12-31 $26,954,612 172,300
2022-12-31 $35,840,404 229,100
2022-12-31 $3,507,384 22,420
2022-09-30 $6,637,529 54,100
2022-09-30 $16,599,957 135,300
2022-09-30 $13,709,503 111,741
2022-06-30 $23,883,208 179,600
2022-06-30 $10,749,039 80,832
2022-06-30 $15,478,872 116,400
2022-03-31 $13,795,488 100,800
2022-03-31 $24,799,032 181,200
2022-03-31 $421,939 3,083

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