First Manhattan
MIR icon

First Manhattan’s Mirion Technologies MIR Stock Holding History

First Manhattan’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
2025
Q2 		– Sell
-76,932
Closed -$1.12M – 713
2025
Q1 		$1.12M Sell
76,932
-43,225
-36% -$679K ﹤0.01% 378
2024
Q4 		$2.1M Sell
120,157
-1,586,360
-93% -$24.6M 0.01% 300
2024
Q3 		$18.9M Sell
1,706,517
-17,874
-1% -$188K 0.06% 107
2024
Q2 		$18.5M Sell
1,724,391
-35,983
-2% -$382K 0.06% 109
2024
Q1 		$20M Sell
1,760,374
-27,685
-2% -$277K 0.06% 103
2023
Q4 		$18.3M Sell
1,788,059
-291,340
-14% -$2.46M 0.06% 104
2023
Q3 		$15.5M Buy
2,079,399
+271,825
+15% +$2.14M 0.06% 117
2023
Q2 		$15.3M Sell
1,807,574
-10,440
-0.6% -$84.7K 0.06% 111
2023
Q1 		$15.5M Sell
1,818,014
-102,100
-5% -$810K 0.06% 110
2022
Q4 		$12.7M Sell
1,920,114
-192,620
-9% -$1.3M 0.05% 128
2022
Q3 		$15.8M Buy
2,112,734
+280,125
+15% +$1.97M 0.07% 109
2022
Q2 		$10.6M Buy
1,832,609
+317,224
+21% +$2.33M 0.04% 152
2022
Q1 		$12.2M Buy
1,515,385
+352,950
+30% +$3.04M 0.04% 156
2021
Q4 		$12.2M Buy
1,162,435
+1,132,795
+3,822% +$12.2M 0.04% 154
2021
Q3 		$302K Buy
+29,640
New +$299K ﹤0.01% 664

Other funds holding MIR

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
CLG
Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Brown Advisory
Brown Advisory Baltimore, Maryland $64.6B AUM 18.98% 1-Year Est. Return
MC
Maverick Capital Dallas, Texas $11.3B AUM 76.6% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

First Manhattan's MIR Position: Q2 2025 in Review

First Manhattan sold out of Mirion Technologies (MIR) in Q2 2025, closing a stake of 76,932 shares — an estimated $1.12M sold.

First Manhattan first reported a position in MIR in Q3 2021 and held it in 15 quarters. The position peaked at $20M in Q1 2024. 301 funds tracked by Wall St. Rank hold MIR as of Q2 2025.

  • First Manhattan reported no remaining Mirion Technologies position as of Q2 2025 after selling out during the quarter.
  • First Manhattan sold 76,932 Mirion Technologies shares in Q2 2025, an estimated $1.12M.
  • First Manhattan first reported a position in Mirion Technologies in Q3 2021 and held it in 15 quarters.
  • First Manhattan's Mirion Technologies position peaked at $20M in Q1 2024.
  • 301 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2025.

Based on First Manhattan's 13F filing for Q2 2025, filed 14 Aug 2025.