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QUMSR

Quantumsphere Acquisition Corp Rights
QUMSR

25 hedge funds and large institutions have $1.18M invested in Quantumsphere Acquisition Corp Rights in 2026 Q2 according to their latest regulatory filings, with 1 funds opening new positions, 3 increasing their positions, 6 reducing their positions, and 0 closing their positions.

New
Increased
Maintained
Reduced
Closed

4% more funds holding

Funds holding: 24 → 25 (+1)

28% less capital invested

Capital invested by funds: $1.63M → $1.18M (-$449K)

50% less repeat investments, than reductions

Existing positions increased: 3 | Existing positions reduced: 6

Holders
25
Holders Change
+1
Holders Change %
+4.17%
% of All Funds
0.3%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
1
Increased
3
Reduced
6
Closed
–
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
WCMNY
Westchester Capital Management (New York)
New York
+$21K
2
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
+$9.89K
3
SCM
Shaolin Capital Management
Florida
+$4.07K
4
AA
AQR Arbitrage
Connecticut
+$682

Top Sellers

Rank Fund Capital Flow
1
HCM
Highbridge Capital Management
New York
-$80.5K
2
HCM
Heights Capital Management
California
-$6.56K
3
WRBC
W.R. Berkley Corp
Connecticut
-$2.31K
4
WAM
Wolverine Asset Management
Illinois
-$559
5
CS
Clear Street
New York
-$420
Name Holding Trade Value Shares
Change 		Change in
Stake
HCI
1
Harraden Circle Investments
New York
$198K – – –
Toronto Dominion Bank
2
Toronto Dominion Bank
Ontario, Canada
$143K +$9.89K +47,068 +7%
SCM
3
Shaolin Capital Management
Florida
$95.4K +$4.07K +19,379 +4%
GCL
4
Glazer Capital LLC
New York
$68K – – –
RCM
5
Rivernorth Capital Management
Florida
$65.8K – – –
AA
6
AQR Arbitrage
Connecticut
$64.5K +$682 +3,246 +1%
LA
7
Linden Advisors
New York
$64.3K – – –
PAMP
8
Polar Asset Management Partners
Ontario, Canada
$64.3K – – –
HIM
9
HGC Investment Management
Ontario, Canada
$59.7K – – –
HCM
10
Highbridge Capital Management
New York
$52.2K -$80.5K -383,088 -55%
CS
11
Clear Street
New York
$44.3K -$420 -2,000 -0.9%
CCC
12
Cable Car Capital
California
$34.8K – – –
RC
13
RLH Capital
New York
$29.7K – – –
WAM
14
Wolverine Asset Management
Illinois
$26.4K -$559 -2,661 -2%
Hudson Bay Capital Management
15
Hudson Bay Capital Management
Connecticut
$25.5K – – –
RCM
16
Radcliffe Capital Management
Pennsylvania
$24.1K – – –
HCM
17
Heights Capital Management
California
$21.3K -$6.56K -31,213 -23%
D.E. Shaw & Co
18
D.E. Shaw & Co
New York
$21.3K – – –
PC
19
Periscope Capital
Ontario, Canada
$20.1K – – –
BNP Paribas Financial Markets
20
BNP Paribas Financial Markets
France
$16.4K – – –
BFM
21
Boothbay Fund Management
New York
$16.1K – – –
WCMNY
22
Westchester Capital Management (New York)
New York
$12.3K +$21K +100,000 New
SSA
23
Schonfeld Strategic Advisors
New York
$8.71K -$63 -300 -0.6%
WRBC
24
W.R. Berkley Corp
Connecticut
$3.87K -$2.31K -11,002 -31%
UBS Group
25
UBS Group
Switzerland
$1.96K – – –

QUMSR Hedge Fund Activity: Q2 2026 in Review

25 of the 8,279 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp Rights (QUMSR) for Q2 2026, worth a combined $1.18M — down 28% from $1.63M a quarter earlier.

Buyers outnumbered sellers: 1 fund opened new QUMSR positions and 0 closed out — a net gain of 1 holder — while 3 added to existing stakes and 6 trimmed.

The largest buyer was Westchester Capital Management (New York), opening a new position worth an estimated $21K. The largest seller was Highbridge Capital Management, cutting an estimated $80.5K.

  • 25 institutional investors held Quantumsphere Acquisition Corp Rights (QUMSR) as of Q2 2026, up from 24 in Q1 2026.
  • Funds reported $1.18M of Quantumsphere Acquisition Corp Rights stock for Q2 2026, down 28% quarter-over-quarter.
  • 1 fund opened new Quantumsphere Acquisition Corp Rights positions in Q2 2026 and 0 closed out, a net change of +1 holder.
  • The largest Quantumsphere Acquisition Corp Rights buyer in Q2 2026 was Westchester Capital Management (New York), an estimated $21K added.
  • The largest Quantumsphere Acquisition Corp Rights seller in Q2 2026 was Highbridge Capital Management, an estimated $80.5K sold.

Based on aggregated 13F filings for Q2 2026.