Buy4

EBR Systems, Inc.

NONE

Total Value

$20.8M

Net $20.8M bought

Filing Date

Aug 25, 2026

1 transaction

Purchases

$20.8M

1 transaction

Trade Summary

On Aug 21, 2026, Host-Plus Pty Ltd as trustee for the HOSTPLUS Pooled Superannuation Trust, Insider, purchased $20.8M of EBR Systems, Inc. (NONE) across 1 transaction. The filing covers Common Stock and reflects net buying of $20.8M. Reported prices ranged from $2.70. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Insider Information

Name: Host-Plus Pty Ltd as trustee for the HOSTPLUS Pooled Superannuation Trust
Role: Insider

Filing Details

Filing Date: Aug 25, 2026
Transaction Date: Aug 21, 2026
Accession Number: 0001231919-26-001062
Form Type: 4
Net Trading Amount: $20.8M

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Aug 21, 2026	Common Stock	7,700,119	$2.70	Purchase	$20.8M

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Footnotes

(F1)Represents shares of the Issuer's common stock underlying CHESS Depositary Interests ("CDIs"). The CDIs are traded on the Australian Securities Exchange (the "ASX") and are held by CHESS Depositary Nominees Pty Limited, a subsidiary of ASX Limited, the company that operates the ASX.
(F2)On August 21, 2026, BB6 Service (HP) Coinvestment Trusco Pty Ltd as trustee for BCP (HP) Co-Investment Trust acquired 77,001,190 CDIs on completion of Tranche 2 of the institutional placement by the Issuer, which was approved by the Issuer's shareholders on August 19, 2026 and settled on August 21, 2026, at a price of A$0.38 per CDI (equivalent to A$3.80 per share of common stock, or approximately US$2.70 per share based on an AUD/USD exchange rate of 0.71 on the settlement date).
(F3)The securities are held directly by BB6 Service (HP) Coinvestment Trusco Pty Ltd as trustee of BCP (HP) Co-Investment Trust. The Reporting Person is the sole beneficiary of BCP (HP) Co-Investment Trust and exercises sole dispositive power over the securities held by BB6 Service (HP) Coinvestment Trusco Pty Ltd.
(F4)Includes 837,638 shares underlying 8,376,380 CDIs previously held by MRCF3 Service (SW) Pty Ltd as trustee for MRCF 3 (SW) Trust, which were transferred to MRCF3 Service (HP) Pty Ltd as trustee of MRCF 3 (HP) Trust subsequent to the Reporting Person's most recent report. Such transfer constituted a change in the Reporting Person's form of ownership that was exempt from reporting pursuant to Rule 16a-13 under the Securities Exchange Act.
(F5)The securities are held directly by MRCF3 Service (HP) Pty Ltd as trustee of MRCF 3 (HP) Trust. The Reporting Person is the sole beneficiary of MRCF 3 (HP) Trust and exercises sole dispositive power over the securities held by MRCF3 Service (HP) Pty Ltd.
(F6)The Securities are held directly by MHC Fund Services B Pty Ltd as trustee for MHC Hostplus Co-Investment Trust. The Reporting Person is the sole beneficiary of MHC Hostplus Co-Investment Trust and exercises shared dispositive power over the securities held by MHC Fund Services B Pty Ltd.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Host-Plus Pty Ltd as trustee for the HOSTPLUS Pooled Superannuation Trust

(Last)

(First)

(Middle)

LEVEL 9, 114 WILLIAM STREET

(Street)

MELBOURNE

30000

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
EBR Systems, Inc. [ NONE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/21/2026		P		7,700,119⁽¹⁾⁽²⁾	A	$2.7⁽²⁾	11,049,972⁽¹⁾	I	By BB6 Service (HP) Coinvestment Trusco Pty Ltd atf BCP (HP) Co-Investment Trust⁽³⁾
Common Stock								3,492,778⁽¹⁾⁽⁴⁾	I	By MRCF3 Service (HP) Pty Ltd atf MRCF 3 (HP) Trust⁽⁵⁾
Common Stock								783,330⁽¹⁾	I	By MHC Fund Services B Pty Ltd atf MHC Hostplus Co-Investment Trust⁽⁶⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Represents shares of the Issuer's common stock underlying CHESS Depositary Interests ("CDIs"). The CDIs are traded on the Australian Securities Exchange (the "ASX") and are held by CHESS Depositary Nominees Pty Limited, a subsidiary of ASX Limited, the company that operates the ASX.

2. On August 21, 2026, BB6 Service (HP) Coinvestment Trusco Pty Ltd as trustee for BCP (HP) Co-Investment Trust acquired 77,001,190 CDIs on completion of Tranche 2 of the institutional placement by the Issuer, which was approved by the Issuer's shareholders on August 19, 2026 and settled on August 21, 2026, at a price of A$0.38 per CDI (equivalent to A$3.80 per share of common stock, or approximately US$2.70 per share based on an AUD/USD exchange rate of 0.71 on the settlement date).

3. The securities are held directly by BB6 Service (HP) Coinvestment Trusco Pty Ltd as trustee of BCP (HP) Co-Investment Trust. The Reporting Person is the sole beneficiary of BCP (HP) Co-Investment Trust and exercises sole dispositive power over the securities held by BB6 Service (HP) Coinvestment Trusco Pty Ltd.

4. Includes 837,638 shares underlying 8,376,380 CDIs previously held by MRCF3 Service (SW) Pty Ltd as trustee for MRCF 3 (SW) Trust, which were transferred to MRCF3 Service (HP) Pty Ltd as trustee of MRCF 3 (HP) Trust subsequent to the Reporting Person's most recent report. Such transfer constituted a change in the Reporting Person's form of ownership that was exempt from reporting pursuant to Rule 16a-13 under the Securities Exchange Act.

5. The securities are held directly by MRCF3 Service (HP) Pty Ltd as trustee of MRCF 3 (HP) Trust. The Reporting Person is the sole beneficiary of MRCF 3 (HP) Trust and exercises sole dispositive power over the securities held by MRCF3 Service (HP) Pty Ltd.

6. The Securities are held directly by MHC Fund Services B Pty Ltd as trustee for MHC Hostplus Co-Investment Trust. The Reporting Person is the sole beneficiary of MHC Hostplus Co-Investment Trust and exercises shared dispositive power over the securities held by MHC Fund Services B Pty Ltd.

	/s/ Greg Clerk, as duly appointed attorney for Host-Plus Pty Limited as trustee of the Hostplus Pooled Superannuation Trust, having no notice of revocation of the power of attorney dated 6 December 2024	08/25/2026
	/s/ Susan Orr, as duly appointed attorney for Host-Plus Pty Limited as trustee of the Hostplus Pooled Superannuation Trust, having no notice of revocation of the power of attorney dated 6 December 2024	08/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001231919-26-001062.

EBR Systems, Inc.

Trade Summary

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

SEC Form 4