Bihua Chen - 26 Jan 2026 Form 4/A - Amendment Insider Report for Helix Acquisition Corp. III (HLXC)

Reporting relationship: Chairperson and CEO, Director, 10%+ Owner
Issuer ticker: HLXC
Reported as of: 26 Jan 2026
Net transaction value: +$12,975,000
SEC form: 4/A - Amendment
Accepted by SEC: 28 Jan 2026, 20:36:50 UTC
Original report date: 26 Jan 2026
Prior SEC filing: 22 Jan 2026
Next SEC filing: 18 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Bihua Chen, Name: Bihua Chen

Key filing fact

Bihua Chen filed Form 4/A - Amendment for Helix Acquisition Corp. III (HLXC) on 28 Jan 2026.

Key facts

This page summarizes Bihua Chen's Form 4/A - Amendment filing for Helix Acquisition Corp. III (HLXC).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 28 Jan 2026, 20:36.

Change

Previous filing in this sequence was filed on 22 Jan 2026.
Current net transaction value: +$12,975,000.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4/A - Amendment disclosures.

View source filing

Reporting Owners (2)

CIK 0001599214 Primary reporting owner

Chen Bihua

Relationship: Chairperson and CEO, Director, 10%+ Owner
Address: C/O CORMORANT ASSET MANAGEMENT, LP, 200 CLARENDON ST, 52ND FLOOR, BOSTON
Signature: /s/ Bihua Chen, Name: Bihua Chen
Signature date: 28 Jan 2026

CIK 0002105798

Helix Holdings III LLC

Relationship: Other*, 10%+ Owner
Address: C/O CORMORANT ASSET MANAGEMENT LP, 200 CLARENDON STREET, 52ND FLOOR, BOSTON
Signature: /s/ Helix Holdings III LLC, by Bihua Chen, Managing Member
Signature date: 28 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HLXC transaction

Class A Ordinary Shares

Award

Transaction value: $4,975,000
Shares: +497,500
Change %
Price: $10.00
Shares after: 497,500
Date: 26 Jan 2026
Ownership: See Footnote
Footnotes: F1

HLXC transaction

Class A Ordinary Shares

Purchase

Transaction value: $8,000,000
Shares: +800,000
Change %
Price: $10.00
Shares after: 800,000
Date: 26 Jan 2026
Ownership: See Footnote
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

HLXC transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: +718,750
Change %: +20%
Price
Shares after: 4,252,500
Date: 22 Jan 2026
Ownership: See Footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 718,750
Exercise price
Footnotes: F1, F4, F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Helix Holdings III LLC is the record holder of the securities reported herein. Cormorant Private Healthcare Fund VI, LP ("Cormorant Fund VI") and Cormorant Global Healthcare Master Fund, LP, together own 100% of the membership interests in Helix Holdings III LLC. Bihua Chen is the managing member of each of Cormorant Fund VI and Cormorant Global Healthcare Master Fund, LP and has voting and investment discretion with respect to the ordinary shares held of record by Helix Holdings III LLC. Bihua Chen disclaims any beneficial ownership of the securities held by Helix Holdings III LLC other than to the extent of any pecuniary interest she may have therein, directly or indirectly.

Footnote F2

This form amends a Form 4 previously filed for the Reporting Person on January 26, 2026 to correct the number of shares that should have been reported on such date, which now includes shares purchased by Cormorant Global Healthcare Master Fund, LP in the Issuer's initial public offering, as described in further detail in the Issuer's registration statement on Form S-1 (File No. 333-291933) ("Registration Statement").

Footnote F3

Cormorant Global Healthcare Master Fund, LP is the record holder of such securities. Ms. Chen is the managing member of Cormorant Global Healthcare Master Fund, LP and has voting and investment discretion with respect to the ordinary shares of record held thereby. Ms. Chen disclaims any beneficial ownership of the securities held by Cormorant Global Healthcare Master Fund, LP other than to the extent of any pecuniary interest she may have therein, directly or indirectly.

Footnote F4

As described in the Registration Statement, under the heading "Description of Securities--Founder Shares and Private Placement Shares", the terms of the Class B ordinary shares, par value $0.0001 per share, provided at issuance that they would automatically convert into Class A ordinary shares, par value $0.0001 per share, concurrently with or immediately following the consummation of the Issuer's initial business combination or earlier at the option of the holder on a one-for-one basis, subject to adjustment for share sub-divisions, share capitalizations, reorganizations, recapitalizations and the like, and certain anti-dilution rights and have no expiration date.

Footnote F5

On January 22, 2026, the Issuer effected a share capitalization with respect to the Class B ordinary shares, resulting in the issue and allotment of 718,750 Class B ordinary shares to Helix Holdings III LLC.

SEC remarks

Helix Holdings III LLC may be deemed a director by deputization by virtue of its representation on the board of directors of the Issuer. See Exhibit 99.1 - Joint Filer Information, which is incorporated herein by reference and describes in further detail the relationships of the Reporting Persons to the Issuer.