Comparable stake leader
Highview Sponsor Co., LLC
SEC ownership of Highview Merger Corp.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002070602.
Disclosed value leader
ADAGE CAPITAL PARTNERS GP, L.L.C.
Comparable rows
30/50
Latest evidence
31 Mar 2026
- Public ticker
- HVMC, HVMCU, HVMCW 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
-
Highview Sponsor Co., LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
30 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Highview Sponsor Co., LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002070602
- Issuer location
- Delray Beach, FL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Highview Merger 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
Highview Sponsor Co., LLC
Disclosed value leader
ADAGE CAPITAL PARTNERS GP...
Comparable rows
30/50
Latest evidence
31 Mar 2026
3/4/5
13D/G
13F
Lead comparable stake: 21%
20 rows are not safely comparable across share classes.
13D/G row: Highview Sponsor Co., LLC
Showing 1-8 of 50 holder rows.
Quick read
Highview Sponsor Co., LLC leads the comparable SEC ownership view at 21%.
30 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 Highview Sponsor Co., LLC's linked filing trail.
Comparable ownership
Top 5
Highview Sponsor Co., LLC
21%
Adage Capital Management, L.P.
7.6%
AQR CAPITAL MANAGEMENT LLC
5.4%
MILLENNIUM MANAGEMENT LLC
4.2%
HEALTHCARE OF ONTARIO PENSION PLA...
4.2%
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 |
|---|---|---|---|---|---|
| Highview Sponsor Co., LLC |
3/4/5
13D/G
Director, *Director by Deputization, 10%+ Owner
|
21%
from 13D/G
|
$3,725,000
372,500 shares
|
— | 11 Aug 2025 |
| Adage Capital Management, L.P. |
13D/G
|
7.6%
|
—
1,800,000 shares
|
$0 | 30 Sep 2025 |
| AQR CAPITAL MANAGEMENT LLC |
13D/G
|
5.4%
|
—
1,268,226 shares
|
$0 | 30 Sep 2025 |
| MILLENNIUM MANAGEMENT LLC |
13F
13D/G
Company
|
4.2%
from 13D/G
|
$10,589,125
1,051,265 shares
mixed-class rows
|
— | 31 Mar 2026 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND |
13F
13D/G
Company
|
4.2%
from 13D/G
|
$10,206,313
1,625,000 shares
mixed-class rows
|
— | 31 Mar 2026 |
| TWO SIGMA INVESTMENTS, LP |
13F
Company
|
2.7%
|
$6,360,173
632,853 shares
|
— | 31 Mar 2026 |
| Irenic Capital Management LP |
13F
Company
|
1.9%
|
$3,052,515
450,000 shares
|
— | 31 Mar 2026 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS |
13F
Company
|
1.7%
|
$4,020,000
400,000 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 19 Jul 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 1-5 of 5 reporting-owner rows connected to Highview Merger Corp.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
5
Largest Forms 3/4/5 holder
Highview Sponsor Co., LLC
Net 12M change
$0
Latest report
11 Aug 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Highview Sponsor Co., LLC | Director, *Director by Deputization, 10%+ Owner | $3,725,000 | Mixed | 11 Aug 2025 | ||
| Edward Zagat | Director | Mixed | 11 Aug 2025 | |||
| Alexander Harstrick | Director | Mixed | 11 Aug 2025 | |||
| Christopher A. Licht | Director | Mixed | 11 Aug 2025 | |||
| Taylor Rettig | President, Director | Mixed | 11 Aug 2025 |
Recent insider transactions for Highview Merger 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Highview Sponsor Co., LLC | Class A Common Stock | Award | 372,500 | 372,500 | 11 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.