$SBXDF

$11.39 +$0.29 (2.61%) Close

$SBXDF Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 25.5M shares outstanding

Who owns SBXDF?

By type of holder

Institutions 87.7% Everyone else 12.3%

No insider has reported a holding in the last two years, so insiders are counted in "Everyone else".

Concentration Top 10 holders own 58.2%

Mizuho Securities USA LLC 14.3% · Linden Advisors LP 7.9%

Institutional ownership

87.7%

+8.0 pts vs last qtr

Institutional holders

+3 vs last qtr

Net shares bought

+2.0M

by institutions in Q2 2026

New / sold out

5 / 2

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Mizuho Securities USA LLC +1.8M
Berkley W R Corp +415.6K

Biggest sellers in Q2 2026

AQR Arbitrage LLC −323.0K
Verition Fund Management LLC SOLD OUT −145.1K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for SilverBox Corp IV in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for SilverBox Corp IV.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years69% Under 1 year31%

Quarterly turnover

8.8%

of institutional shares changed hands

Top 10 managers, median time held

1.8 years

Super Investors

Investment managers reporting SBXDF on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
MS Mizuho Securities USA LLC	3.6M	14.29%	+1.8M (+102.4%)	Q3 '25	0.4%
Shares held by quarter Peak holding3.6M (Q2'26) Change over 8 quarters+3.6M Share of the company14.290% Mizuho Securities USA LLC's full portfolio →
LA Linden Advisors LP	2.0M	7.86%	Unchanged	2024	0.1%
Shares held by quarter Peak holding2.0M (Q3'24) Change over 8 quarters0 Share of the company7.860% Linden Advisors LP's full portfolio →

Mizuho Securities USA LLC

3.6M

% of company

14.29%

Change vs last qtr

+1.8M (+102.4%)

Held since

Q3 '25

Linden Advisors LP

2.0M

% of company

7.86%

Change vs last qtr

Unchanged

Held since

2024

25 more super investors behind a free account

See every manager holding SilverBox Corp IV, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting SBXDF on Form N-PORT; together they hold 4.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
RS Riverpark Short Term High Yield Fund RiverPark Funds Trust	$7.34M	678.6K	2.67%	1.49%	June 30, 2026
FT First Trust Merger Arbitrage Fund Investment Managers Series Trust II	$4.03M	372.7K	1.46%	0.25%	June 30, 2026

Riverpark Short Term High Yield Fund

RiverPark Funds Trust

Position value

$7.34M

% of company

2.67%

% of the fund

1.49%

As of

June 30, 2026

First Trust Merger Arbitrage Fund

Investment Managers Series Trust II

Position value

$4.03M

% of company

1.46%

% of the fund

0.25%

As of

June 30, 2026

5 more funds behind a free account

See every fund holding SilverBox Corp IV and how much of the fund the position is.

Comments