Comparable stake leader
Helix Holdings III LLC
SEC ownership of Helix Acquisition Corp. III
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002099656.
Disclosed value leader
Cormorant Asset Management, LP
Comparable rows
45/46
Latest evidence
31 Mar 2026
- Public ticker
- HLXC on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Helix Holdings III LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
45 of 46
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Helix Holdings III 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
- 0002099656
- Issuer location
- Boston, MA
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 Helix Acquisition Corp. III (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
Helix Holdings III LLC
Disclosed value leader
Cormorant Asset Managemen...
Comparable rows
45/46
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 25%
1 rows are not safely comparable across share classes.
13D/G row: Helix Holdings III LLC
Showing 1-8 of 46 holder rows.
Quick read
Helix Holdings III LLC leads the comparable SEC ownership view at 25%.
45 of 46 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 Helix Holdings III LLC's linked filing trail.
Comparable ownership
Top 5
Helix Holdings III LLC
25%
Nantahala Capital Management, LLC
8.3%
Affinity Asset Advisors, LLC
7%
RA CAPITAL MANAGEMENT, L.P.
7%
SILVERARC CAPITAL MANAGEMENT, LLC
6.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 46 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Helix Holdings III LLC |
13D/G
Bihua Chen
|
25%
|
—
5,550,000 shares
|
$0 | 26 Jan 2026 |
| Nantahala Capital Management, LLC |
13D/G
13F
Company
|
8.3%
|
$12,700,000
1,250,000 shares
|
$0 | 31 Mar 2026 |
| Affinity Asset Advisors, LLC |
13D/G
13F
Company
|
7%
|
$12,700,000
1,250,000 shares
|
$0 | 31 Mar 2026 |
| RA CAPITAL MANAGEMENT, L.P. |
13F
13D/G
Company
|
7%
from 13D/G
|
$12,700,000
1,250,000 shares
|
— | 31 Mar 2026 |
| SILVERARC CAPITAL MANAGEMENT, LLC |
13F
13D/G
Company
|
6.8%
from 13D/G
|
$12,283,298
1,208,986 shares
|
— | 31 Mar 2026 |
| ADAR1 Capital Management, LLC |
13F
13D/G
Company
|
5.6%
from 13D/G
|
$10,300,000
1,000,000 shares
|
— | 31 Mar 2026 |
| INTEGRATED CORE STRATEGIES (US) LLC |
13D/G
Millennium Management LLC
|
4.8%
|
$8,694,125
855,721 shares
|
-$2,466,990 | 31 Mar 2026 |
| Cormorant Asset Management, LP |
13F
Company
|
7.3%
|
$13,182,600
1,297,500 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 05 Aug 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 Helix Acquisition Corp. III. Open a relationship link for the CIK-to-CIK filing trail.
Rows
5
Largest Forms 3/4/5 holder
Bihua Chen
Net 12M change
$0
Latest report
26 Jan 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Bihua Chen | Chairperson and CEO, Director, 10%+ Owner | $8,000,000 | Filing P/S | 26 Jan 2026 | ||
| Caleb Tripp | Cfo & Coo | Mixed | 22 Jan 2026 | |||
| Nebojsa Obradovic | Chief Legal Officer | Mixed | 22 Jan 2026 | |||
| Mark C. McKenna | Director | Mixed | 22 Jan 2026 | |||
| John P. Schmid | Director | Mixed | 22 Jan 2026 |
Recent insider transactions for Helix Acquisition Corp. III
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Bihua Chen | HLXC | Class A Ordinary Shares | Purchase | 800,000 | 800,000 | 26 Jan 2026 | See Footnote | |||
| Bihua Chen | HLXC | Class A Ordinary Shares | Award | 497,500 | 497,500 | 26 Jan 2026 | See Footnote | |||
| Bihua Chen | HLXC | Class B Ordinary Shares | Other | 20.3% | 718,750 | 4,252,500 | 22 Jan 2026 | See Footnote |
* marks a reported price that did not pass the local price check.