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.

INCOME OPPORTUNITY REALTY INVESTORS INC /TX/

CIK 0000949961IOR· quarter ending 2026-06-30

Shares outstanding

4,066,178

as of 2026-08-06 · 10-Q cover page, filed 2026-08-06

Held by 13F filers

9,237

0.2% of shares outstanding

Holders

+1 vs 2026-03-31 · 1 new, 0 exited

Value

$171K

shares +1.5% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-06, as of 2026-08-06)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	IOR · NYSEAMER	4,066,178	9,237	0.2%	4	452926108

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
	452926108	COM	4	9,237	4,066,178	0.2%	$171K	—	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 (4 of 4 · 452926108)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	VANGUARD CAPITAL MANAGEMENT LLC	6,107	0.15%	$113K	—
2	VANGUARD FIDUCIARY TRUST CO	2,782	0.07%	$52K	—
3	Tower Research Capital LLC (TRC)	196	0.00%	$4K	-18 (-8.4%)
4	UBS Group AG	152	0.00%	$3K	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
REALTY ADVISORS INC	SCHEDULE 13D/A	2025-12-17	2025-12-08	269,299	6.6%
TRANSCONTINENTAL REALTY INVESTORS INC	SCHEDULE 13D/A	2025-12-17	2025-12-08	3,437,909	84.5%

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.