Massachusetts Financial Services’s Mirion Technologies MIR Stock Holding History

Massachusetts Financial Services’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 Q2	$13.6M	Sell	760,985 -828,274	-52%	-$15.4M	﹤0.01%	735
2026 Q1	$29.5M	Sell	1,589,259 -2,074,220	-57%	-$46.8M	0.01%	572
2025 Q4	$85.8M	Sell	3,663,479 -1,728,293	-32%	-$43.1M	0.03%	398
2025 Q3	$125M	Buy	5,391,772 +1,558,104	+41%	+$33.7M	0.04%	346
2025 Q2	$82.5M	Buy	+3,833,668	New	+$66.1M	0.03%	403

Other funds holding MIR

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

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

Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return

CLG

Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

CAM

Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Massachusetts Financial Services's MIR Position: Q2 2026 in Review

Massachusetts Financial Services reduced its Mirion Technologies (MIR) stake by 52% in Q2 2026, selling an estimated $15.4M and leaving 760,985 shares worth $13.6M. The position accounts for ﹤0.01% of the portfolio, ranked #735.

Massachusetts Financial Services first reported a position in MIR in Q2 2025 and has held it in 5 quarters since. The position peaked at $125M in Q3 2025. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

Massachusetts Financial Services held 760,985 shares of Mirion Technologies worth $13.6M as of Q2 2026.
Massachusetts Financial Services sold 828,274 Mirion Technologies shares in Q2 2026, an estimated $15.4M.
Mirion Technologies made up ﹤0.01% of Massachusetts Financial Services's portfolio in Q2 2026, its #735 holding.
Massachusetts Financial Services first reported a position in Mirion Technologies in Q2 2025 and has held it in 5 quarters since.
Massachusetts Financial Services's Mirion Technologies position peaked at $125M in Q3 2025.
351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Massachusetts Financial Services's 13F filing for Q2 2026, filed 3 Aug 2026.