SEC ownership of Safeguard Acquisition Corp.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002082844.

Comparable stake leader

Safeguard Acquisition Management LLC

Disclosed value leader

ADAGE CAPITAL PARTNERS GP, L.L.C.

Comparable rows

50/50

Latest evidence

30 Jun 2026

Top shareholders Insider holders Latest transactions

Public ticker: SAC, SAC-UN, SAC-WT on NYSE
Parsed ownership sources: 3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: Safeguard Acquisition Management LLC
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: Safeguard Acquisition Management LLC
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: 0002082844
Issuer location: Las Vegas, NV

Ownership snapshot

Top shareholders of Safeguard Acquisition Corp. (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

Safeguard Acquisition Man...

Disclosed value leader

ADAGE CAPITAL PARTNERS GP...

Comparable rows

50/50

Latest evidence

30 Jun 2026

3/4/5 13D/G 13F Lead comparable stake: 19% 13D/G row: Safeguard Acquisition Management LLC Showing 1-8 of 50 holder rows.

Quick read

Safeguard Acquisition Management LLC leads the comparable SEC ownership view at 19%.

50 of 50 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 Safeguard Acquisition Management LLC's linked filing trail.

Comparable ownership Top 5

Safeguard Acquisition Management LLC 19%

Adage Capital Management, L.P. 7.6%

Linden Capital L.P. 6.4%

Harraden Circle Investments, LLC 6.2%

ADAGE CAPITAL PARTNERS GP, L.L.C. 7.6%

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

Detailed SEC evidence table Showing 1-8 of 50 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Safeguard Acquisition Management LLC	3/4/5 13D/G Director, Director by Deputization, 10%+ Owner 3/4/5 13D/G	19% from 13D/G	$4,700,000 470,000 shares	—	05 Dec 2025
Adage Capital Management, L.P.	13D/G 13D/G	7.6%	— 1,800,000 shares	$0	31 Dec 2025
Linden Capital L.P.	13D/G Linden Advisors LP 13D/G	6.4%	$15,190,600 1,510,000 shares	+$2,615,600	30 Jun 2026
Harraden Circle Investments, LLC	13F 13D/G Company 13F 13D/G	6.2% from 13D/G	$14,768,684 1,468,060 shares	—	30 Jun 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	7.6%	$18,108,000 1,800,000 shares	—	30 Jun 2026
LINDEN ADVISORS LP	13F Company 13F	6.4%	$15,190,600 1,510,000 shares	—	30 Jun 2026
Alberta Investment Management Corp	13F Company 13F	5.3%	$12,575,000 1,250,000 shares	—	30 Jun 2026
D. E. Shaw & Co., Inc.	13F Company 13F	3.5%	$8,391,237 834,119 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 28 Aug 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 1-6 of 6 reporting-owner rows connected to Safeguard Acquisition Corp.. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

Safeguard Acquisition Management LLC

Net 12M change

Latest report

05 Dec 2025

Name	Relationship	Holdings Value	Valuation	Report Date
Safeguard Acquisition Management LLC	Director, Director by Deputization, 10%+ Owner	$4,700,000	Mixed	05 Dec 2025
Bruce A. Carlson	Director		Mixed	03 Dec 2025
Poa Daniel Crowley	Director		Mixed	03 Dec 2025
Lee D. Stern	Director		Mixed	03 Dec 2025
Richard Y. Newton III	Director		Mixed	03 Dec 2025
Robert M. Tarola	Chief Financial Officer, Director		Mixed	03 Dec 2025

Recent insider transactions for Safeguard Acquisition Corp.

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

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
Safeguard Acquisition Management LLC	SAC	Class A ordinary shares	Award				470,000	470,000	05 Dec 2025	Direct

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