Essex Investment Management’s Mirion Technologies MIR Stock Holding History

Essex Investment Management’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	$5.75M	Buy	309,110 +5,758	+2%	+$130K	0.91%	28
2025 Q4	$7.1M	Sell	303,352 -7,148	-2%	-$178K	1.08%	21
2025 Q3	$7.22M	Buy	310,500 +10,684	+4%	+$231K	1.11%	22
2025 Q2	$6.46M	Sell	299,816 -2,057	-0.7%	-$35.5K	1.17%	19
2025 Q1	$4.38M	Sell	301,873 -2,382	-0.8%	-$37.4K	0.91%	25
2024 Q4	$5.31M	Sell	304,255 -47,223	-13%	-$732K	0.95%	23
2024 Q3	$3.89M	Buy	351,478 +980	+0.3%	+$10.3K	0.68%	51
2024 Q2	$3.76M	Buy	350,498 +90,998	+35%	+$967K	0.7%	45
2024 Q1	$2.95M	Buy	259,500 +1,427	+0.6%	+$14.3K	0.58%	61
2023 Q4	$2.65M	Sell	258,073 -1,139	-0.4%	-$9.61K	0.52%	65
2023 Q3	$1.94M	Buy	+259,212	New	+$2.04M	0.32%	106

Other funds holding MIR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

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 Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

CLG

Cooperman Leon G $3.05B AUM 42.78% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

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

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Essex Investment Management's MIR Position: Q1 2026 in Review

Essex Investment Management increased its Mirion Technologies (MIR) stake by 1.9% in Q1 2026, buying an estimated $130K and bringing the position to 309,110 shares worth $5.75M. The position accounts for 0.91% of the portfolio, ranked #28.

Essex Investment Management first reported a position in MIR in Q3 2023 and has held it in 11 quarters since. The position peaked at $7.22M in Q3 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

Essex Investment Management held 309,110 shares of Mirion Technologies worth $5.75M as of Q1 2026.
Essex Investment Management bought 5,758 Mirion Technologies shares in Q1 2026, an estimated $130K.
Mirion Technologies made up 0.91% of Essex Investment Management's portfolio in Q1 2026, its #28 holding.
Essex Investment Management first reported a position in Mirion Technologies in Q3 2023 and has held it in 11 quarters since.
Essex Investment Management's Mirion Technologies position peaked at $7.22M in Q3 2025.
361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Essex Investment Management's 13F filing for Q1 2026, filed 11 May 2026.