Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Bluemount Holdings Ltd

CIK 0002027815BMHL· quarter ending 2026-06-30

Shares outstanding

25,000,000

as of 2026-03-31 · 20-F cover page, filed 2026-06-29

Held by 13F filers

46,956

0.2% of shares outstanding

Holders

+1 vs 2026-03-31 · 1 new, 0 exited

Value

$267K

shares -28.3% vs prior quarter

Share classes (cover page of the 20-F filed 2026-06-29, as of 2026-03-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	BMHL · NASDAQ	25,000,000	46,956	0.2%	2	G1194L118

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	G1194L118	COM CL B	2	46,956	25,000,000	0.2%	$267K	—	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (2 of 2 · G1194L118)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	CITADEL ADVISORS LLC	46,878	0.19%	$267K	-18,652 (-28.5%)
2	UBS Group AG	78	0.00%	$467	NEW

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Siu Hiu Ki Jamie	SCHEDULE 13G	2026-09-02	2026-09-01	2,274,185	16.2%
Luk Tung Lam	SCHEDULE 13G/A	2026-09-01	2026-04-07	2,573,872	18.4%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.