SEC ownership of Blueport Acquisition Ltd

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002064177.

Comparable stake leader

Blueport Acquisition Corp

Disclosed value leader

Karpus Management, Inc.

Comparable rows

19/43

Latest evidence

30 Jun 2026

Top shareholders Insider holders Latest transactions

Public ticker: BPAC, BPACR, BPACU on Nasdaq
Parsed ownership sources: 3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: Blueport Acquisition Corp
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 19 of 43
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: Blueport Acquisition Corp
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 30 Jun 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0002064177
Issuer location: New York, NY

Ownership snapshot

Top shareholders of Blueport Acquisition Ltd (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

Blueport Acquisition Corp

Disclosed value leader

Karpus Management, Inc.

Comparable rows

19/43

Latest evidence

30 Jun 2026

3/4/5 13D/G 13F Lead comparable stake: 22% 24 rows are not safely comparable across share classes. 13D/G row: Blueport Acquisition Corp Showing 1-8 of 43 holder rows.

Quick read

Blueport Acquisition Corp leads the comparable SEC ownership view at 22%.

19 of 43 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 Blueport Acquisition Corp's linked filing trail.

Comparable ownership Top 5

Blueport Acquisition Corp 22%

Karpus Management, Inc. 9.7%

WOLVERINE ASSET MANAGEMENT LLC 5.6%

Shaolin Capital Management LLC 5.5%

MIZUHO FINANCIAL GROUP INC 3.9%

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

Detailed SEC evidence table Showing 1-8 of 43 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Blueport Acquisition Corp	3/4/5 13D/G 10%+ Owner · Blueport Acquisition Corporation 3/4/5 13D/G	22% from 13D/G	— 1,634,750 shares	—	13 Nov 2025
Karpus Management, Inc.	13F 13D/G Company 13F 13D/G	9.7% from 13D/G	$7,230,993 714,525 shares	—	30 Jun 2026
WOLVERINE ASSET MANAGEMENT LLC	13F 13D/G Company 13F 13D/G	5.6% from 13D/G	$3,512,223 438,440 shares mixed-class rows	—	30 Jun 2026
Shaolin Capital Management LLC	13D/G 13F Company 13D/G 13F	5.5%	$3,240,894 326,374 shares	$0	08 Jan 2026
MIZUHO FINANCIAL GROUP INC	13D/G 13D/G	3.9%	— 229,444 shares	$0	31 Mar 2026
William S. Rosenstadt	3/4/5 CEO and Chairman, Director, 10%+ Owner 3/4/5	22%	— 1,634,750 shares	—	13 Nov 2025
MIZUHO SECURITIES USA LLC	13F Company 13F	3.7%	$2,186,030 220,144 shares	—	30 Jun 2026
BERKLEY W R CORP	13F Company 13F	3.2%	$1,946,825 192,279 shares	—	30 Jun 2026

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.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 05 Sep 2025.

Buys

Insiders: 0

Sells

Insiders: 0

Net

Shares: 0

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 0

Window (months)	Buy value	Sell value	Net value
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-7 of 7 reporting-owner rows connected to Blueport Acquisition Ltd. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

William S. Rosenstadt

Net 12M change

Latest report

13 Nov 2025

Name	Relationship	Valuation	Report Date
William S. Rosenstadt	CEO and Chairman, Director, 10%+ Owner	Mixed	13 Nov 2025
Scott J. Silverman	Director	Mixed	10 Nov 2025
Kulwant Sandher	Chief Financial Officer	Mixed	10 Nov 2025
Yarona L. Yieh	Director	Mixed	10 Nov 2025
Steven Andrew Sanders	Director	Mixed	10 Nov 2025
Blueport Acquisition Corp	10%+ Owner	Mixed	13 Nov 2025
Roy Jiang	10%+ Owner	Mixed	13 Nov 2025

Recent insider transactions for Blueport Acquisition Ltd

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Shares	Shares owned	Date	Ownership
William S. Rosenstadt	BPAC	Class A Ordinary Share, par value $0.0001 per share	Purchase	13.7%	197,250	1,634,750	13 Nov 2025	See Footnote
William S. Rosenstadt	BPAC	Right to receive one-sixth of one Class A Ordinary Share	Purchase		197,250	197,250	13 Nov 2025	See Footnote
Roy Jiang	BPAC	Class A Ordinary Share, par value $0.0001 per share	Purchase	13.7%	197,250	1,634,750	13 Nov 2025	See Footnote
Roy Jiang	BPAC	Right to receive one-sixth of one Class A Ordinary Share	Purchase		197,250	197,250	13 Nov 2025	See Footnote
Blueport Acquisition Corp	BPAC	Class A Ordinary Share, par value $0.0001 per share	Purchase	13.7%	197,250	1,634,750	13 Nov 2025	Direct
Blueport Acquisition Corp	BPAC	Right to receive one-sixth of one Class A Ordinary Share	Purchase		197,250	197,250	13 Nov 2025	Direct

^* marks a reported price that did not pass the local price check.