Comparable stake leader
Mark N. Tompkins
SEC ownership of Primus Acquisition Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002098382.
Disclosed value leader
Exor N.V.
Comparable rows
5/5
Latest evidence
31 Mar 2026
- Parsed ownership sources
- 3/4/5, 13D/G, and 13F
- Largest SEC-reported holder
- Mark N. Tompkins
- Latest 13D/G holder
- Mark N. Tompkins
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0002098382
- Issuer location
- Boca Raton, FL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Primus Acquisition Inc. (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
Mark N. Tompkins
Disclosed value leader
Exor N.V.
Comparable rows
5/5
Latest evidence
31 Mar 2026
3/4/5
13D/G
13F
Lead comparable stake: 75%
13D/G row: Mark N. Tompkins
Quick read
Mark N. Tompkins leads the comparable SEC ownership view at 75%.
5 of 5 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 Mark N. Tompkins's linked filing trail.
Comparable ownership
Top 5
Mark N. Tompkins
75%
Ian Seth Jacobs
25%
Exor N.V.
617%
ORBIMED ADVISORS LLC
21%
Strategic Investment Solutions, I...
0%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-5 of 5 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Mark N. Tompkins |
3/4/5
13D/G
Director, 10%+ Owner
|
75%
from 13D/G
|
—
7,500,000 shares
|
— | 26 Jan 2026 |
| Ian Seth Jacobs |
3/4/5
13D/G
President, CEO, CFO, Secretary, Director · Ian Jacobs
|
25%
from 13D/G
|
—
2,500,000 shares
|
— | 26 Jan 2026 |
| Exor N.V. |
13F
Company
|
617%
|
$5,001,704,778
182,543,970 shares
|
— | 31 Mar 2026 |
| ORBIMED ADVISORS LLC |
13F
Company
|
21%
|
$22,079,801
6,210,899 shares
|
— | 31 Mar 2026 |
| Strategic Investment Solutions, Inc. /IL |
13F
Company
|
0%
|
$29,157
127 shares
|
— | 31 Mar 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 07 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-2 of 2 reporting-owner rows connected to Primus Acquisition Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
2
Largest Forms 3/4/5 holder
Mark N. Tompkins
Net 12M change
$0
Latest report
26 Jan 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Mark N. Tompkins | Director, 10%+ Owner | Mixed | 26 Jan 2026 | |||
| Ian Seth Jacobs | President, CEO, CFO, Secretary, Director | Mixed | 26 Jan 2026 |
Recent insider transactions for Primus Acquisition Inc.
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Ian Seth Jacobs | Common Stock | 0 | 2,500,000 | 26 Jan 2026 | Direct | |||||
| Mark N. Tompkins | Common Stock | 0 | 7,500,000 | 26 Jan 2026 | Direct |
* marks a reported price that did not pass the local price check.