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	$536K	Sell	32,600 -6,000	-16%	-$147K	﹤0.01%	9134
2025 Q4	$1.1M	Buy	38,600 +10,700	+38%	+$290K	﹤0.01%	7174
2025 Q3	$822K	Sell	27,900 -294,400	-91%	-$8.05M	﹤0.01%	7970
2025 Q2	$9.29M	Buy	322,300 +121,100	+60%	+$3.58M	﹤0.01%	3134
2025 Q1	$7.04M	Buy	201,200 +187,400	+1,358%	+$7.64M	﹤0.01%	3361
2024 Q4	$615K	Sell	13,800 -5,900	-30%	-$241K	﹤0.01%	8094
2024 Q3	$898K	Sell	19,700 -8,600	-30%	-$348K	﹤0.01%	7088
2024 Q2	$940K	Buy	28,300 +500	+2%	+$20.5K	﹤0.01%	6710
2024 Q1	$1.33M	Sell	27,800 -12,300	-31%	-$717K	﹤0.01%	6340
2023 Q4	$2.96M	Sell	40,100 -18,600	-32%	-$1.26M	﹤0.01%	4670
2023 Q3	$4.29M	Buy	58,700 +32,800	+127%	+$2.62M	﹤0.01%	3908
2023 Q2	$2.15M	Buy	25,900 +11,700	+82%	+$1.02M	﹤0.01%	5031
2023 Q1	$1.27M	Sell	14,200 -53,300	-79%	-$4.64M	﹤0.01%	6286
2022 Q4	$5.78M	Sell	67,500 -16,810	-20%	-$1.42M	﹤0.01%	3615
2022 Q3	$6.03M	Buy	84,310 +15,090	+22%	+$1.35M	﹤0.01%	3557
2022 Q2	$6.73M	Sell	69,220 -58,980	-46%	-$6.01M	﹤0.01%	3273
2022 Q1	$14.4M	Sell	128,200 -137,900	-52%	-$14.7M	﹤0.01%	2418
2021 Q4	$35.9M	Buy	266,100 +59,900	+29%	+$8.34M	0.01%	1448
2021 Q3	$29.1M	Sell	206,200 -12,200	-6%	-$1.64M	0.01%	1596
2021 Q2	$28M	Buy	218,400 +67,200	+44%	+$7.91M	0.01%	1692
2021 Q1	$19.3M	Buy	151,200 +74,500	+97%	+$13.8M	﹤0.01%	2006
2020 Q4	$13.8M	Sell	76,700 -14,800	-16%	-$3.29M	﹤0.01%	2233
2020 Q3	$20.1M	Buy	91,500 +31,900	+54%	+$7.12M	0.01%	1563
2020 Q2	$13.3M	Buy	59,600 +42,000	+239%	+$6.58M	﹤0.01%	1895
2020 Q1	$1.72M	Buy	17,600 +12,300	+232%	+$995K	﹤0.01%	4392
2019 Q4	$398K	Sell	5,300 -3,400	-39%	-$220K	﹤0.01%	7164
2019 Q3	$534K	Sell	8,700 -1,300	-13%	-$78.2K	﹤0.01%	6626
2019 Q2	$593K	Buy	10,000 +100	+1%	+$6K	﹤0.01%	6568
2019 Q1	$648K	Buy	9,900 +4,500	+83%	+$272K	﹤0.01%	6353
2018 Q4	$264K	Sell	5,400 -16,000	-75%	-$955K	﹤0.01%	7478
2018 Q3	$1.4M	Buy	21,400 +4,100	+24%	+$287K	﹤0.01%	4979
2018 Q2	$1.15M	Buy	17,300 +7,100	+70%	+$429K	﹤0.01%	4976
2018 Q1	$528K	Sell	10,200 -1,100	-10%	-$51.2K	﹤0.01%	5790
2017 Q4	$490K	Sell	11,300 -2,500	-18%	-$102K	﹤0.01%	5681
2017 Q3	$605K	Buy	+13,800	New	+$480K	﹤0.01%	5037
2016 Q1	–	Sell	-4,300	Closed	-$91K	–	7732
2015 Q4	$91K	Buy	4,300 +800	+23%	+$16.2K	﹤0.01%	6799
2015 Q3	$66K	Sell	3,500 -2,200	-39%	-$47.1K	﹤0.01%	7356
2015 Q2	$131K	Buy	5,700 +2,500	+78%	+$58.2K	﹤0.01%	6805
2015 Q1	$86K	Sell	3,200 -5,500	-63%	-$140K	﹤0.01%	6969
2014 Q4	$252K	Buy	+8,700	New	+$236K	﹤0.01%	5678
2014 Q3	–	Sell	-11,200	Closed	-$248K	–	8343
2014 Q2	$248K	Buy	11,200 +7,400	+195%	+$170K	﹤0.01%	5308
2014 Q1	$104K	Buy	+3,800	New	+$111K	﹤0.01%	6161

Other funds holding QDEL

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

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 Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

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.