Quantumsphere Acquisition Corp - UNIT 07/30/2030 (QUMSU)

CUSIP: G7387B122

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class
Equity / UNIT 07/30/2030
Total 13F shares
5,748,407
Total 13F value
$58,230,524
Share change
+5,428,010
SEC-reported price per share
$10.13
Number of holders
31
Value change
+$54,984,903
Number of buys
29

Security key

G7387B122

Report period

Q3 2025

Institutions

31

Top holders

10

QUMSU full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 Quantumsphere Acquisition Corp SEC filings Quantumsphere Acquisition Corp company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Ownership snapshot

Top reported holders of QUMSU - Quantumsphere Acquisition Corp - UNIT 07/30/2030 (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Whiteowl Holdings LLC
Disclosed value leader
—
Comparable rows
1/2
Latest evidence
05 Aug 2025
3/4/5 13D/G Lead comparable stake: 27% 1 rows are not safely comparable across share classes. 13D/G row: Whiteowl Holdings LLC

Quick read

Whiteowl Holdings LLC leads the comparable SEC ownership view at 27%.

1 of 2 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Whiteowl Holdings LLC's linked filing trail.
Comparable ownership Top 1
Whiteowl Holdings LLC 27%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-2 of 2 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Whiteowl Holdings LLC
3/4/5 13D/G
10%+ Owner
3/4/5 13D/G
27%
from 13D/G
—
3,126,650 shares
 — 05 Aug 2025
Ping Zhang
3/4/5
Chairman, CEO, and CFO, Director
3/4/5
—
class O/S missing
—
3,126,650 shares
 — 05 Aug 2025
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions
31
Shares
5,748,407
Rows available
31
Investor Option Weight % Change % SEC-reported value * Price Shares Share Change Activity Report Period

* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2025 vs Q4 2025 Across Filers

Q4 2025 holders
9
Q3 2025 holders
31
Holder diff
22
Investor Q4 2025 Shares Q3 2025 Shares Share Diff Share Chg % Q4 2025 value Q3 2025 value Value change Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
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