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 		$3.89M Sell
209,400
-83,300
-28% -$1.88M ﹤0.01% 4765
2025
Q4 		$6.86M Buy
292,700
+188,400
+181% +$4.7M ﹤0.01% 3799
2025
Q3 		$2.43M Buy
104,300
+56,400
+118% +$1.22M ﹤0.01% 5673
2025
Q2 		$1.03M Sell
47,900
-19,200
-29% -$331K ﹤0.01% 7017
2025
Q1 		$973K Buy
67,100
+36,000
+116% +$566K ﹤0.01% 7020
2024
Q4 		$543K Buy
31,100
+29,400
+1,729% +$456K ﹤0.01% 8369
2024
Q3 		$18.8K Sell
1,700
-1,000
-37% -$10.5K ﹤0.01% 12820
2024
Q2 		$29K Sell
2,700
-49,000
-95% -$521K ﹤0.01% 12308
2024
Q1 		$588K Sell
51,700
-101,900
-66% -$1.02M ﹤0.01% 8029
2023
Q4 		$1.57M Sell
153,600
-1,400
-0.9% -$11.8K ﹤0.01% 5801
2023
Q3 		$1.16M Sell
155,000
-52,100
-25% -$411K ﹤0.01% 6272
2023
Q2 		$1.75M Sell
207,100
-57,000
-22% -$463K ﹤0.01% 5391
2023
Q1 		$2.26M Buy
264,100
+126,900
+92% +$1.01M ﹤0.01% 5137
2022
Q4 		$907K Sell
137,200
-60,000
-30% -$404K ﹤0.01% 6994
2022
Q3 		$1.47M Buy
197,200
+100,100
+103% +$705K ﹤0.01% 6195
2022
Q2 		$559K Sell
97,100
-46,200
-32% -$340K ﹤0.01% 8403
2022
Q1 		$1.16M Sell
143,300
-112,400
-44% -$968K ﹤0.01% 7377
2021
Q4 		$2.68M Buy
255,700
+28,800
+13% +$309K ﹤0.01% 5560
2021
Q3 		$2.32M Sell
226,900
-55,800
-20% -$563K ﹤0.01% 5974
2021
Q2 		$2.94M Sell
282,700
-278,800
-50% -$2.87M ﹤0.01% 5653
2021
Q1 		$5.86M Buy
+561,500
New +$6.59M ﹤0.01% 3917

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.