Citadel Advisors
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Citadel Advisors’s Mirion Technologies MIR Stock Holding History

Citadel Advisors’s Portfolio MIR Stock Details MIR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$301K Sell
16,200
-58,400
-78% -$1.32M ﹤0.01% 10467
2025
Q4 		$1.75M Sell
74,600
-131,700
-64% -$3.28M ﹤0.01% 6194
2025
Q3 		$4.8M Sell
206,300
-13,500
-6% -$292K ﹤0.01% 4433
2025
Q2 		$4.73M Buy
219,800
+173,100
+371% +$2.98M ﹤0.01% 4202
2025
Q1 		$677K Sell
46,700
-25,200
-35% -$396K ﹤0.01% 7810
2024
Q4 		$1.25M Buy
71,900
+21,900
+44% +$340K ﹤0.01% 6563
2024
Q3 		$554K Sell
50,000
-4,900
-9% -$51.5K ﹤0.01% 8044
2024
Q2 		$590K Buy
54,900
+38,800
+241% +$412K ﹤0.01% 7713
2024
Q1 		$183K Sell
16,100
-2,300
-13% -$23K ﹤0.01% 10454
2023
Q4 		$189K Buy
18,400
+14,100
+328% +$119K ﹤0.01% 10041
2023
Q3 		$32.1K Sell
4,300
-2,100
-33% -$16.5K ﹤0.01% 12221
2023
Q2 		$54.1K Sell
6,400
-1,600
-20% -$13K ﹤0.01% 11705
2023
Q1 		$68.3K Sell
8,000
-12,700
-61% -$101K ﹤0.01% 11773
2022
Q4 		$137K Buy
20,700
+5,100
+33% +$34.3K ﹤0.01% 10747
2022
Q3 		$117K Sell
15,600
-1,300
-8% -$9.15K ﹤0.01% 10956
2022
Q2 		$97K Sell
16,900
-40,900
-71% -$301K ﹤0.01% 11437
2022
Q1 		$466K Sell
57,800
-700
-1% -$6.03K ﹤0.01% 9563
2021
Q4 		$613K Sell
58,500
-228,800
-80% -$2.46M ﹤0.01% 9176
2021
Q3 		$2.94M Sell
287,300
-166,100
-37% -$1.68M ﹤0.01% 5410
2021
Q2 		$4.71M Sell
453,400
-98,400
-18% -$1.01M ﹤0.01% 4572
2021
Q1 		$5.75M Buy
+551,800
New +$6.48M ﹤0.01% 3969

Other funds holding MIR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
CLG
Cooperman Leon G $3.05B AUM 42.78% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Citadel Advisors's MIR Position: Q1 2026 in Review

Citadel Advisors increased its Mirion Technologies (MIR) stake by 12% in Q1 2026, buying an estimated $4.57M and bringing the position to 1,823,252 shares worth $33.9M. The position accounts for 0.01% of the portfolio, ranked #1731.

Citadel Advisors first reported a position in MIR in Q4 2020 and has held it in 18 quarters since. The position peaked at $38M in Q4 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • Citadel Advisors held 1,823,252 shares of Mirion Technologies worth $33.9M as of Q1 2026.
  • Citadel Advisors bought 202,459 Mirion Technologies shares in Q1 2026, an estimated $4.57M.
  • Mirion Technologies made up 0.01% of Citadel Advisors's portfolio in Q1 2026, its #1731 holding.
  • Citadel Advisors first reported a position in Mirion Technologies in Q4 2020 and has held it in 18 quarters since.
  • Citadel Advisors's Mirion Technologies position peaked at $38M in Q4 2025.
  • 361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.