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QUMSR

Quantumsphere Acquisition Corp Rights
QUMSR

24 hedge funds and large institutions have $1.63M invested in Quantumsphere Acquisition Corp Rights in 2026 Q1 according to their latest regulatory filings, with 3 funds opening new positions, 1 increasing their positions, 7 reducing their positions, and 2 closing their positions.

New
Increased
Maintained
Reduced
Closed

50% more first-time investments, than exits

New positions opened: 3 | Existing positions closed: 2

32% more capital invested

Capital invested by funds: $1.24M → $1.63M (+$394K)

4% more funds holding

Funds holding: 23 → 24 (+1)

86% less repeat investments, than reductions

Existing positions increased: 1 | Existing positions reduced: 7

Holders
24
Holders Change
+1
Holders Change %
+4.35%
% of All Funds
0.3%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
3
Increased
1
Reduced
7
Closed
2
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
RCM
Rivernorth Capital Management
Florida
+$92.6K
2
PAMP
Polar Asset Management Partners
Ontario, Canada
+$87.2K
3
HCM
Highbridge Capital Management
New York
+$1.39K

Top Sellers

Rank Fund Capital Flow
1
MC
Meteora Capital
Florida
-$7.59K
2
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
-$5.3K
3
WAM
Wolverine Asset Management
Illinois
-$3.23K
4
HCM
Heights Capital Management
California
-$2.56K
5
CS
Clear Street
New York
-$1.06K
Name Holding Trade Value Shares
Change 		Change in
Stake
HCI
1
Harraden Circle Investments
New York
$248K – – –
HCM
2
Highbridge Capital Management
New York
$173K +$1.39K +6,367 +0.9%
Toronto Dominion Bank
3
Toronto Dominion Bank
Ontario, Canada
$168K -$5.3K -24,300 -3%
SCM
4
Shaolin Capital Management
Florida
$115K – – –
RCM
5
Rivernorth Capital Management
Florida
$106K +$92.6K +424,512 New
PAMP
6
Polar Asset Management Partners
Ontario, Canada
$100K +$87.2K +400,000 New
LA
7
Linden Advisors
New York
$90K – – –
AA
8
AQR Arbitrage
Connecticut
$80.3K -$362 -1,658 -0.5%
HIM
9
HGC Investment Management
Ontario, Canada
$75K – – –
GCL
10
Glazer Capital LLC
New York
$67K – – –
CS
11
Clear Street
New York
$56.1K -$1.06K -4,872 -2%
CCC
12
Cable Car Capital
California
$43.7K – – –
RC
13
RLH Capital
New York
$40.7K +$40.3K +184,900 New
Hudson Bay Capital Management
14
Hudson Bay Capital Management
Connecticut
$37.5K – – –
HCM
15
Heights Capital Management
California
$34.5K -$2.56K -11,719 -8%
WAM
16
Wolverine Asset Management
Illinois
$33.8K -$3.23K -14,787 -10%
RCM
17
Radcliffe Capital Management
Pennsylvania
$33K – – –
D.E. Shaw & Co
18
D.E. Shaw & Co
New York
$31.3K – – –
PC
19
Periscope Capital
Ontario, Canada
$27.5K – – –
BFM
20
Boothbay Fund Management
New York
$25K – – –
BNP Paribas Financial Markets
21
BNP Paribas Financial Markets
France
$22.5K – – –
SSA
22
Schonfeld Strategic Advisors
New York
$12K -$22 -99 -0.2%
WRBC
23
W.R. Berkley Corp
Connecticut
$7.73K – – –
UBS Group
24
UBS Group
Switzerland
$2.56K -$17 -77 -0.5%
MC
25
Meteora Capital
Florida
– -$7.59K -36,121 Closed
1
2

QUMSR Hedge Fund Activity: Q1 2026 in Review

24 of the 8,127 institutional investors tracked by Wall St. Rank reported a position in Quantumsphere Acquisition Corp Rights (QUMSR) for Q1 2026, worth a combined $1.63M — up 32% from $1.24M a quarter earlier.

Buyers outnumbered sellers: 3 funds opened new QUMSR positions and 2 closed out — a net gain of 1 holder — while 1 added to existing stakes and 7 trimmed.

The largest buyer was Rivernorth Capital Management, opening a new position worth an estimated $92.6K. The largest seller was Meteora Capital, exiting entirely with an estimated $7.59K sold.

  • 24 institutional investors held Quantumsphere Acquisition Corp Rights (QUMSR) as of Q1 2026, up from 23 in Q4 2025.
  • Funds reported $1.63M of Quantumsphere Acquisition Corp Rights stock for Q1 2026, up 32% quarter-over-quarter.
  • 3 funds opened new Quantumsphere Acquisition Corp Rights positions in Q1 2026 and 2 closed out, a net change of +1 holder.
  • The largest Quantumsphere Acquisition Corp Rights buyer in Q1 2026 was Rivernorth Capital Management, an estimated $92.6K added.
  • The largest Quantumsphere Acquisition Corp Rights seller in Q1 2026 was Meteora Capital, an estimated $7.59K sold.

Based on aggregated 13F filings for Q1 2026.