QUMSU

Quantumsphere Acquisition Corp · NASDAQ NMS - GLOBAL MARKET · N/A

$10.32+$0.22 (+2.18%)

Prices delayed up to 5 minutes

AC Intelligence

AC Intelligence for QUMSU is being prepared.

Key Stats

Open

$10.32

Day High

$10.32

Day Low

$10.32

Prev Close

$10.10

Volume

Avg Volume

12.7K

Day Change

+$0.22

Change %

+2.18%

Fundamentals

P/E

289.0

EPS (TTM)

$0.03

Market Cap

$116M

52-Wk Range

$9.92 — $10.23

What is P/E? →Stock fundamentals explained →

Earnings History

Insider Activity

Who Owns This Stock

Who Owns QUMSU

Other97.7%6 holders

Tactical / Macro1.3%1 holder

Dealer / Bank0.9%2 holders

Based on Q4 2025 13F filings + AC behavioral model

9 institutional holders

Top Holders

1.▼RIVERNORTH CAPITAL MANAGEMENT, LLCother_unclassified

-0.1%$4321.5B

2.Polar Asset Management Partners Inc.other_unclassified

0.0%$4072.0B

3.★Westchester Capital Management, LLCother_unclassified

$924.4B

4.GABELLI & Co INVESTMENT ADVISERS, INC.other_unclassified

0.0%$689.2B

5.GABELLI FUNDS LLCother_unclassified

0.0%$583.3B

6.▼Clear Street Group Inc.tactical_macro

-93.2%$151.3B

7.JPMORGAN CHASE & COdealer_bank

0.0%$101.8B

8.★Westchester Capital Management, LLCother_unclassified

$84.1B

9.★Westchester Capital Management, LLCother_unclassified

$9.5B

10.★UBS Group AGdealer_bank

$4.7B

11.★HRT FINANCIAL LPother_unclassified

$316M

Institutional Pressure

Market Regime:Strong Risk-Off (-0.62)

SELLINGBUYING

▲

Mild Selling Pressure

Other(97.7%)

●

—

Tactical / Macro(1.3%)

●

Reducing rapidly

Dealer / Bank(0.9%)

●

Facilitating

Updated daily · Based on Q4 2025 filings + AC behavioral model

Sentiment Signals

→Insider ActivityNo insider transactions in last 90 daysSEC Form 4

↑↑Inst. Flows5 increased/new, 2 decreased/exited (13F)AC 13F Analysis

Sources: SEC Form 4, AC 13F Analysis

On AcidCapitalist

No recent mentions of QUMSU on AcidCapitalist.

Data provided by Finnhub. Prices delayed up to 5 minutes.