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Mirion Technologies
MIR

93 hedge funds and large institutions have $1.51B invested in Mirion Technologies in 2021 Q4 according to their latest regulatory filings, with 48 funds opening new positions, 20 increasing their positions, 19 reducing their positions, and 51 closing their positions.

New
Increased
Maintained
Reduced
Closed

790% more call options, than puts

Call options by funds: $25.2M | Put options by funds: $2.83M

187% more capital invested

Capital invested by funds: $525M → $1.51B (+$981M)

133% more funds holding in top 10

Funds holding in top 10: 3 → 7 (+4)

4.1% more ownership

Funds ownership: 68.52% → 72.62% (+4.1%)

5% more repeat investments, than reductions

Existing positions increased: 20 | Existing positions reduced: 19

6% less first-time investments, than exits

New positions opened: 48 | Existing positions closed: 51

4% less funds holding

Funds holding: 97 → 93 (-4)

Holders
93
Holders Change
-4
Holders Change %
-4.12%
% of All Funds
1.43%
Holding in Top 10
7
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+133.33%
% of All Funds
0.11%
New
48
Increased
20
Reduced
19
Closed
51
Calls
$25.2M
Puts
$2.83M
Net Calls
+$22.4M
Net Calls Change
+$28.2M

Top Buyers

Rank Fund Capital Flow
1
Goldman Sachs
Goldman Sachs
New York
+$572M
2
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$101M
3
Fidelity Investments
Fidelity Investments
Massachusetts
+$80.5M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$75.5M
5
SIG
Senator Investment Group
New York
+$73.8M

Top Sellers

Rank Fund Capital Flow
1
RCM
Ratan Capital Management
Florida
-$32M
2
Citadel Advisors
Citadel Advisors
Florida
-$29.1M
3
ECP
Empyrean Capital Partners
California
-$25.8M
4
AGM
Alpine Global Management
New York
-$20.4M
5
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
-$16.1M
Name Holding Trade Value Shares
Change 		Change in
Stake
Blackstone Inc
101
Blackstone Inc
New York
– -$10.2M -1,000,000 Closed
GCM
102
Graham Capital Management
Connecticut
– -$10.1M -986,116 Closed
WAM
103
Weiss Asset Management
Massachusetts
– -$7.2M -704,623 Closed
Capstone Investment Advisors
104
Capstone Investment Advisors
New York
– -$5.96M -583,200 Closed
HI
105
HBK Investments
Texas
– -$5.34M -522,218 Closed
UOC
106
UBS O'Connor
Illinois
– -$5.11M -500,000 Closed
TCA
107
Taconic Capital Advisors
New York
– -$4.6M -450,000 Closed
LA
108
Linden Advisors
New York
– -$3.96M -387,900 Closed
TAL
109
TIG Advisors LLC
New York
– -$3.63M -355,283 Closed
AC
110
Antara Capital
New York
– -$3.06M -300,000 Closed
Walleye Trading
111
Walleye Trading
New York
– -$2.79M -273,353 Closed
TCM
112
Tenor Capital Management
New York
– -$2.61M -255,150 Closed
PMAM
113
Picton Mahoney Asset Management
Ontario, Canada
– -$2.35M -230,200 Closed
Marshall Wace
114
Marshall Wace
United Kingdom
– -$1.57M -153,727 Closed
PSAMP
115
P. Schoenfeld Asset Management (PSAM)
New York
– -$1.52M -149,147 Closed
CH
116
CVI Holdings
Delaware
– -$1.43M -140,304 Closed
HSBC Holdings
117
HSBC Holdings
United Kingdom
– -$1.32M -130,000 Closed
Simplex Trading
118
Simplex Trading
Illinois
– -$1.37M -127,909 Closed
AC
119
Athanor Capital
New York
– -$1.03M -100,561 Closed
FIG
120
Fortress Investment Group
New York
– -$1.02M -100,000 Closed
Jane Street
121
Jane Street
New York
– -$989K -92,129 Closed
GCIA
122
Gabelli & Co Investment Advisers
New York
– -$922K -90,197 Closed
GCL
123
Glazer Capital LLC
New York
– -$912K -89,222 Closed
SSA
124
Schonfeld Strategic Advisors
New York
– -$658K -64,400 Closed
BCM
125
Bluefin Capital Management
New York
– -$566K -55,400 Closed
2 3 4
5
6

MIR Hedge Fund Activity: Q4 2021 in Review

93 of the 6,498 institutional investors tracked by Wall St. Rank reported a position in Mirion Technologies (MIR) for Q4 2021, worth a combined $1.51B — up 187% from $525M a quarter earlier.

Sellers outnumbered buyers: 51 funds closed out of MIR and 48 opened new positions — a net loss of 3 holders — while 19 trimmed existing stakes and 20 added.

The largest buyer was Goldman Sachs, opening a new position worth an estimated $572M. The largest seller was Ratan Capital Management, cutting an estimated $32M.

  • 93 institutional investors held Mirion Technologies (MIR) as of Q4 2021, down from 97 in Q3 2021.
  • Funds reported $1.51B of Mirion Technologies stock for Q4 2021, up 187% quarter-over-quarter.
  • 48 funds opened new Mirion Technologies positions in Q4 2021 and 51 closed out, a net change of -3 holders.
  • The largest Mirion Technologies buyer in Q4 2021 was Goldman Sachs, an estimated $572M added.
  • The largest Mirion Technologies seller in Q4 2021 was Ratan Capital Management, an estimated $32M sold.

Based on aggregated 13F filings for Q4 2021.