UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. 1)*

BioAtla, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

09077B104

(CUSIP Number)

December 31, 2021

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

¨ Rule 13d-1(b)

x Rule 13d-1(c)

¨ Rule 13d-1(d)

*       The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

1.	Name of Reporting Persons: HBM Healthcare Investments (Cayman) Ltd.
2.	Check the Appropriate Box if a Member of a Group
	(a)	¨
	(b)	¨
3.	SEC Use Only
4.	Citizenship or Place of Organization: Cayman Islands, British West Indies

Number of Shares Beneficially Owned by Each Reporting Person With	5.	Sole Voting Power: 1,427,317
	6.	Shared Voting Power: 0
	7.	Sole Dispositive Power: 1,427,317
	8.	Shared Dispositive Power: 0

9.	Aggregate Amount Beneficially Owned by Each Reporting Person: 1,427,317
10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o
11.	Percent of Class Represented by Amount in Row (9): 4.0% (1)
12.	Type of Reporting Person (See Instructions): CO

(1)        Based on 35,343,790 shares of the Issuer’s Common Stock outstanding as of November 12, 2021, as reported in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on November 15, 2021.

Item 1.	(a).	Name of Issuer: BioAtla, Inc.
	(b).	Address of Issuer’s Principal Executive Offices: 11085 Torreyana Road San Diego, CA 92121
Item 2(a).		Name of Person Filing: HBM Healthcare Investments (Cayman) Ltd.
Item 2(b).		Address of Principal Business Office: Governors Square 23 Lime Tree Bay Avenue PO Box 30852 Grand Cayman, Cayman Islands
Item 2(c).		Citizenship: Cayman Islands, British West Indies

Item 2(d). Title of Class of Securities:
Common Stock, par value $0.0001

Item 2(e).		CUSIP Number: 09077B104
Item 3.	If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:
	Not Applicable.
Item 4.	Ownership.
	(a)	Amount beneficially owned: 1,427,317 (1)
	(b)	Percent of class: 4.0% (2)
	(c)	Number of shares as to which the Reporting Person has:
		(i)	Sole power to vote or to direct the vote: 1,427,317
		(ii)	Shared power to vote or to direct the vote: 0
		(iii)	Sole power to dispose or to direct the disposition of: 1,427,317
		(iv)	Shared power to dispose or to direct the disposition of: 0

Item 5.	Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof, the reporting persons have ceased to be the beneficial owner of more than five percent of the class of securities, check the following:   x
Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
	Not Applicable.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.
	Not Applicable.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable.
Item 9.	Notice of Dissolution of Group.
	Not Applicable.
Item 10.	Certification.
	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under §240.14a-11.
	(1)	Voting and investment power over the shares held by HBM Healthcare Investments (Cayman) Ltd. is exercised by the board of directors of HBM Healthcare Investments (Cayman) Ltd. (the “Board”). The Board consists of Jean-Marc LeSieur, Richard H. Coles, Sophia Harris, Dr. Andreas Wicki, Mark Kronenfeld, M.D. and Richard Paul Woodhouse, none of whom has individual voting or investment power with respect to the shares.
	(2)	Based on 35,343,790 shares of the Issuer’s Common Stock outstanding as of November 12, 2021, as reported in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on November 15, 2021.

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: February 11, 2022

HBM HEALTHCARE INVESTMENTS (CAYMAN) LTD.
By:	/s/ Jean-Marc LeSieur
Name:	Jean-Marc LeSieur
Title:	Managing Director

SIGNATURE PAGE TO SCHEDULE 13G AMENDMENT NO. 1 (BIOATLA, INC.)