BSAAR · BEST SPAC I Acquisition Corp. · Holdings

$0.08 At close · Oct 27

Market Cap

$22.17M

2.07M

Volume · Oct 27 716 Avg daily vol (3M) 23K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of BSAAR: 13F, 13D and 13G, insiders and funds →

Recent SEC filings are still being reconciled. Holder totals and changes may be incomplete until processing catches up.

Quarter:

Holders: 24

Total Value: $565,257

Total Shares: 3,550,255

Institutional Ownership Trend

4 quarters

Holder Concentration

Across 24 13F filers · Δ vs Mar 31, 2026

Top Holder

10.5%

−0.9 pts

Top 5

45.2%

−2.9 pts

Top 10

73.1%

−2.4 pts

HHI

649

Broadly held−50

Who Holds BSAAR

Last 4 quarters through Jun 30, 2026

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026: 24 filers, like-for-like change 0.0%; actively managed books 0.0%.

Holder type	Share	Filers	Change	New
Registered adviser	71.3%	14	-4.1%	1
Adviser	2.5%	1	-1.0%	0
Bank	2.5%	2	0.0%	0
Insurer	2.6%	1	-43.9%	0
Non-US	1.0%	1	0.0%	0
Unknown	20.1%	5	+33.7%	1

Style	Share	Filers	Change	New
Systematic-like	9.8%	2	0.0%	0
Concentrated	10.1%	1	+89.2%	0
Diversified active	80.1%	21	-5.6%	2
Index-like	0.0%	0	—	0

Turnover	Share	Filers	Change	New
Medium turnover	20.3%	10	-5.3%	1
High turnover	69.6%	13	-5.0%	1
Low turnover	0.0%	0	—	0
Unknown	10.1%	1	+89.2%	0

Holding horizon	Share	Filers	Change	New
Short horizon	53.7%	11	+4.9%	0
Medium horizon	9.7%	4	+40.8%	1
Long horizon	3.5%	3	0.0%	0
Unknown	33.1%	6	-13.9%	1

13F book size	Share	Filers	Change	New
Under $1B	15.2%	4	-12.8%	0
$1B to $10B	62.6%	14	-5.3%	1
$10B to $100B	21.2%	4	+36.5%	1
$100B or more	1.0%	2	0.0%	0

Client base	Share	Filers	Change	New
Pooled investment vehicles	58.6%	12	-4.9%	1
Registered funds and BDCs	12.7%	2	0.0%	0
Unknown	28.7%	10	+11.8%	1

Private funds	Share	Filers	Change	New
Hedge funds	69.9%	13	-4.2%	1
No private funds	1.4%	1	0.0%	0
Unknown	28.7%	10	+11.8%	1

Location	Share	Filers	Change	New	Exited
United States	87.5%	19	0.0%	2	0
Outside the US	12.5%	5	0.0%	0	0

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Conviction and Crowding

24 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

0.000% of filers hold it in their top 10

Mar 31, 2026: 0

Holders above 5%

median weight 0.001%

Mar 31, 2026: 0

Crowding

—

shares outstanding is an issuer-wide count, not one listing's

Private-fund advisers

—

of shares outstanding

Institutional ownership

—

shares outstanding is an issuer-wide count, not one listing's

Top 10 holders

72.0%

of 13F shares, Herfindahl 0.064

Active holders

0.0%

like-for-like share change of active filers

5% stakes on record

0 13D, 0 13G

How long holders have held it value-weighted 3.7 quarters

Under 1 year 20.1% 1 to 3 years 79.9% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Shared Holders

Companies BSAAR's active holders also own, quarter ended Mar 31, 2026

#	Company	Shared holders	Similarity
1	SIMA SIM Acquisition Corp. I	6	0.632
2	LWAC LightWave Acquisition Corp.	5	0.589
3	OBA Oxley Bridge Acquisition Ltd	4	0.577
4	NMP NMP Acquisition Corp.	3	0.548
5	FSHP Flag Ship Acquisition Corp	3	0.548
6	DTSQ DT Cloud Star Acquisition Corp	3	0.548
7	BLUW Blue Water Acquisition Corp. III	3	0.500
8	PACH Pioneer Acquisition I Corp	3	0.500
9	LCCC Lakeshore Acquisition III Corp.	3	0.500
10	KFII K&F Growth Acquisition Corp. II	4	0.492

Shareholder Targets

13F filers that own its peers but not BSAAR, quarter ended Mar 31, 2026

Found through its holder-overlap peers: SIMA, LWAC, OBA, NMP, FSHP, DTSQ, BLUW, PACH, LCCC, KFII, SSAC, LPAA, APAC, BLRK, MACI, SCII, BACC, NPAC, IPEX, HAVA. 87 filers in all.

#	Filer	In peers	Of book	Largest peers
1	Magnetar Financial LLC Registered adviser, Concentrated	$161,193,149 15 held	1.81%	SIMA, LPAA, NPAC
2	D. E. Shaw & Co., Inc. Unknown, Systematic-like	$118,938,617 14 held	0.100%	KFII, BLUW, PACH
3	LMR Partners LLP Exempt adviser, Diversified active	$111,230,459 11 held	1.47%	LPAA, BACC, MACI
4	Linden Advisors LP Registered adviser, Diversified active	$107,933,898 12 held	6.72%	SCII, KFII, NPAC
5	TENOR CAPITAL MANAGEMENT Co., L.P. Registered adviser, Diversified active	$102,106,935 12 held	7.47%	KFII, BACC, NPAC
6	PICTON MAHONEY ASSET MANAGEMENT Non-US, Diversified active	$85,805,022 12 held	0.940%	LPAA, SIMA, KFII
7	Alberta Investment Management Corp Non-US, Concentrated	$70,938,830 9 held	0.500%	KFII, NPAC, SIMA
8	First Trust Capital Management L.P. Registered adviser, Diversified active	$69,848,622 8 held	8.14%	LPAA, MACI, SIMA
9	SONA ASSET MANAGEMENT (US) LLC Registered adviser, Diversified active	$63,469,621 15 held	3.76%	BACC, SCII, HAVA
10	TWO SIGMA INVESTMENTS, LP Registered adviser, Systematic-like	$62,389,567 14 held	0.050%	KFII, BLUW, PACH

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: +2

Institutional value: +1.2%

Shares held: -0.0%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Large Clear Street Group Inc.	+168,868	358,203
Mid Shaolin Capital Management LLC	+12,899	239,899
Mid AQR Arbitrage LLC	+1,098	115,132

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid WOLVERINE ASSET MANAGEMENT LLC	−150,985	212,633
Mid BERKLEY W R CORP	−71,752	91,786
Small Radcliffe Capital Management, L.P.	−70,000	100,000
Small HEIGHTS CAPITAL MANAGEMENT, INC	−21,578	153,122
Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC	−1,012	300,273

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)	Open
Mid ADAR1 Capital Management, LLC	100,000	$16,560
Large HRT FINANCIAL LP	32,719	$5

Top Sold-Out Positions

vs Mar 31, 2026

No fully closed positions this quarter.

Filter: New 2 Increased 3 Reduced 6 Sold out 0 Unchanged 13

Holder type: Registered adviser 14 Adviser 1 Bank 2 Insurer 1 Non-US 1 Unknown 5

Showing 24 of 24

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Clear Street Group Inc. BSAAR

$59,318

10.49%

358,203

RIVERNORTH CAPITAL MANAGEMENT, LLC BSAAR

$56,200

9.94%

400,000

HIGHBRIDGE CAPITAL MANAGEMENT LLC BSAAR

$49,725

8.80%

300,273

Hudson Bay Capital Management LP BSAAR

$45,540

8.06%

275,000

MANGROVE PARTNERS IM, LLC BSAAR

$44,852

7.93%

270,848

Shaolin Capital Management LLC BSAAR

$39,727

7.03%

239,899

WOLVERINE ASSET MANAGEMENT LLC BSAAR

$35,212

6.23%

212,633

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wolverine Holdings, LLC	212,633	$35,212	100.0%	Defined

Polar Asset Management Partners Inc. BSAAR

$30,636

5.42%

185,000

BOOTHBAY FUND MANAGEMENT, LLC BSAAR

$26,910

4.76%

162,500

HEIGHTS CAPITAL MANAGEMENT, INC BSAAR

$25,357

4.49%

153,122

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	153,122	$25,357	100.0%	Other

MMCAP International Inc. SPC BSAAR

$20,700

3.66%

125,000

AQR Arbitrage LLC BSAAR

$19,066

3.37%

115,132

Radcliffe Capital Management, L.P. BSAAR

$16,780

2.97%

100,000

ADAR1 Capital Management, LLC BSAAR

$16,560

2.93%

100,000

ARISTEIA CAPITAL, L.L.C. BSAAR

$15,732

2.78%

95,000

BERKLEY W R CORP BSAAR

$15,200

2.69%

91,786

METEORA CAPITAL, LLC BSAAR

$14,887

2.63%

89,897

TORONTO DOMINION BANK BSAAR

$14,488

2.56%

87,276

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TD SECURITIES (USA) LLC	87,276	$14,488	100.0%	Defined

Westchester Capital Management, LLC BSAAR

$8,281

1.46%

50,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WESTCHESTER CAPITAL PARTNERS, LLC	468	$77	0.9%	Sole
Virtus Investment Advisers, LLC	45,379	$7,515	90.7%	Other
Held directly	4,153	$687	8.3%	Sole

BNP PARIBAS ARBITRAGE, SA BSAAR

$5,934

1.05%

35,966

Centiva Capital, LP BSAAR

$4,140

0.73%

25,000

Mint Tower Capital Management B.V. BSAAR

0.00%

45,000

HRT FINANCIAL LP BSAAR

0.00%

32,719

UBS Group AG BSAAR

—

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	1	$0	—	Defined

Key facts CIK 2051587 CUSIP G1069P103