Citadel Advisors
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Citadel Advisors’s QuidelOrtho QDEL Stock Holding History

Citadel Advisors’s Portfolio QDEL Stock Details QDEL Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$279K Buy
17,000
+2,200
+15% +$54K ﹤0.01% 10635
2025
Q4 		$423K Sell
14,800
-15,500
-51% -$420K ﹤0.01% 9423
2025
Q3 		$892K Buy
30,300
+8,900
+42% +$243K ﹤0.01% 7777
2025
Q2 		$617K Buy
21,400
+7,500
+54% +$222K ﹤0.01% 8141
2025
Q1 		$486K Buy
13,900
+200
+1% +$8.16K ﹤0.01% 8536
2024
Q4 		$610K Sell
13,700
-25,100
-65% -$1.03M ﹤0.01% 8116
2024
Q3 		$1.77M Sell
38,800
-39,100
-50% -$1.58M ﹤0.01% 5771
2024
Q2 		$2.59M Sell
77,900
-21,200
-21% -$867K ﹤0.01% 4837
2024
Q1 		$4.75M Sell
99,100
-21,000
-17% -$1.22M ﹤0.01% 4028
2023
Q4 		$8.85M Buy
120,100
+12,200
+11% +$825K ﹤0.01% 3008
2023
Q3 		$7.88M Sell
107,900
-900
-0.8% -$71.9K ﹤0.01% 2986
2023
Q2 		$9.02M Sell
108,800
-18,100
-14% -$1.58M ﹤0.01% 2816
2023
Q1 		$11.3M Buy
126,900
+10,500
+9% +$914K ﹤0.01% 2644
2022
Q4 		$9.97M Sell
116,400
-21,100
-15% -$1.79M ﹤0.01% 2851
2022
Q3 		$9.83M Buy
137,500
+37,720
+38% +$3.37M ﹤0.01% 2795
2022
Q2 		$9.7M Sell
99,780
-40,520
-29% -$4.13M ﹤0.01% 2728
2022
Q1 		$15.8M Sell
140,300
-100,100
-42% -$10.7M ﹤0.01% 2288
2021
Q4 		$32.5M Buy
240,400
+27,200
+13% +$3.79M 0.01% 1533
2021
Q3 		$30.1M Sell
213,200
-44,100
-17% -$5.93M 0.01% 1562
2021
Q2 		$33M Buy
257,300
+100,000
+64% +$11.8M 0.01% 1514
2021
Q1 		$20.1M Buy
157,300
+84,400
+116% +$15.6M ﹤0.01% 1956
2020
Q4 		$13.1M Sell
72,900
-44,900
-38% -$9.98M ﹤0.01% 2298
2020
Q3 		$25.8M Buy
117,800
+58,700
+99% +$13.1M 0.01% 1351
2020
Q2 		$13.2M Buy
59,100
+36,300
+159% +$5.69M ﹤0.01% 1914
2020
Q1 		$2.23M Buy
22,800
+16,300
+251% +$1.32M ﹤0.01% 3965
2019
Q4 		$488K Buy
6,500
+2,900
+81% +$187K ﹤0.01% 6836
2019
Q3 		$221K Sell
3,600
-8,100
-69% -$487K ﹤0.01% 8025
2019
Q2 		$694K Buy
11,700
+7,200
+160% +$432K ﹤0.01% 6295
2019
Q1 		$295K Sell
4,500
-7,200
-62% -$436K ﹤0.01% 7640
2018
Q4 		$571K Sell
11,700
-600
-5% -$35.8K ﹤0.01% 6204
2018
Q3 		$802K Buy
12,300
+7,600
+162% +$531K ﹤0.01% 5927
2018
Q2 		$313K Sell
4,700
-1,600
-25% -$96.7K ﹤0.01% 7140
2018
Q1 		$326K Buy
+6,300
New +$293K ﹤0.01% 6612
2017
Q4 		– Sell
-7,200
Closed -$316K – 8343
2017
Q3 		$316K Buy
+7,200
New +$251K ﹤0.01% 5989
2016
Q1 		– Sell
-600
Closed -$13K – 7730
2015
Q4 		$13K Sell
600
-4,600
-88% -$93.4K ﹤0.01% 8174
2015
Q3 		$98K Sell
5,200
-700
-12% -$15K ﹤0.01% 6973
2015
Q2 		$135K Buy
5,900
+3,500
+146% +$81.5K ﹤0.01% 6763
2015
Q1 		$65K Buy
2,400
+600
+33% +$15.3K ﹤0.01% 7207
2014
Q4 		$52K Buy
+1,800
New +$48.8K ﹤0.01% 7163
2014
Q3 		– Sell
-200
Closed -$4K – 8341
2014
Q2 		$4K Sell
200
-200
-50% -$4.6K ﹤0.01% 7763
2014
Q1 		$11K Buy
+400
New +$11.7K ﹤0.01% 7489

Other funds holding QDEL

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
NM
Newtyn Management New York $936M AUM 27.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Citadel Advisors's QDEL Position: Q4 2025 in Review

Citadel Advisors sold out of QuidelOrtho (QDEL) in Q4 2025, closing a stake of 169,010 shares — an estimated $4.58M sold.

Citadel Advisors first reported a position in QDEL in Q1 2014 and held it in 41 quarters. The position peaked at $90.5M in Q3 2022. 244 funds tracked by Wall St. Rank hold QDEL as of Q4 2025.

  • Citadel Advisors reported no remaining QuidelOrtho position as of Q4 2025 after selling out during the quarter.
  • Citadel Advisors sold 169,010 QuidelOrtho shares in Q4 2025, an estimated $4.58M.
  • Citadel Advisors first reported a position in QuidelOrtho in Q1 2014 and held it in 41 quarters.
  • Citadel Advisors's QuidelOrtho position peaked at $90.5M in Q3 2022.
  • 244 funds tracked by Wall St. Rank held QuidelOrtho as of Q4 2025.

Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.