Profusa (PFSA) 10% holder cuts direct stake to zero

Q: What insider transaction in PFSA did HRT FINANCIAL LP report on this Form 4?

HRT FINANCIAL LP reported a sale of 18,395 PFSA common shares on 2026-08-17 at $5.94 per share , classified as an open market or private transaction.

Q: How many Profusa (PFSA) shares did HRT FINANCIAL LP own after the reported sale?

After the transaction, HRT FINANCIAL LP reported owning 0 shares of Profusa common stock. The Form 4 shows total shares following the transaction as 0 , indicating no remaining directly held shares.

Q: What was the price of the PFSA shares sold by HRT FINANCIAL LP?

The PFSA shares were sold at $5.94 per share . The Form 4 characterizes the transaction price as a per-share amount for the 18,395 common shares sold on 2026-08-17.

Q: What type of transaction did HRT FINANCIAL LP report for PFSA stock?

HRT FINANCIAL LP reported a sale transaction (code S) in Profusa common stock. The description states it was a sale in open market or private transaction involving 18,395 shares at $5.94 per share.

Q: Is HRT FINANCIAL LP a ten percent owner of Profusa (PFSA) according to this filing?

Yes. HRT FINANCIAL LP is identified as a ten percent owner of Profusa, Inc. The reporting person section flags the firm as a 10% owner , though it reported 0 shares held directly after this transaction.

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Profusa, Inc. (PFSA) reported that large shareholder HRT FINANCIAL LP, identified as a ten percent owner, executed a sale of common stock. On 2026-08-17, HRT FINANCIAL LP sold 18,395 shares of Profusa common stock at $5.94 per share in a sale described as occurring in the open market or a private transaction. Following this transaction, the reporting holder’s direct ownership in Profusa common stock was reported as 0 shares.

Insider Trade Summary

Net Seller: 18,395 shares

Net Sell 1 txn

Insider HRT FINANCIAL LP

Role 10% Owner

Sold 18,395 shs ($109K)

Type	Security	Shares	Price	Value
Sale	Common Stock	18,395	$5.94	$109K

Holdings After Transaction: Common Stock — 0 shares (Direct)

Key Figures

Shares sold: 18,395 shares Sale price per share: $5.94 per share Shares owned after transaction: 0 shares +1 more

4 metrics

Shares sold 18,395 shares Common stock sale reported by HRT FINANCIAL LP on 2026-08-17

Sale price per share $5.94 per share Price for the 18,395 Profusa common shares sold

Shares owned after transaction 0 shares Total direct Profusa common stock holdings reported after the sale

Transaction code S Indicates a sale in open market or private transaction

Key Terms

ten percent owner, Form 4, open market or private transaction

3 terms

ten percent owner regulatory

"HRT FINANCIAL LP is identified as a ten percent owner of Profusa"

Form 4 regulatory

"HRT FINANCIAL LP reported the transaction on a Form 4"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

open market or private transaction financial

"The sale is described as a sale in open market or private transaction"

FAQ

What insider transaction in PFSA did HRT FINANCIAL LP report on this Form 4?

HRT FINANCIAL LP reported a sale of 18,395 PFSA common shares on 2026-08-17 at $5.94 per share, classified as an open market or private transaction.

How many Profusa (PFSA) shares did HRT FINANCIAL LP own after the reported sale?

After the transaction, HRT FINANCIAL LP reported owning 0 shares of Profusa common stock. The Form 4 shows total shares following the transaction as 0, indicating no remaining directly held shares.

What was the price of the PFSA shares sold by HRT FINANCIAL LP?

The PFSA shares were sold at $5.94 per share. The Form 4 characterizes the transaction price as a per-share amount for the 18,395 common shares sold on 2026-08-17.

What type of transaction did HRT FINANCIAL LP report for PFSA stock?

HRT FINANCIAL LP reported a sale transaction (code S) in Profusa common stock. The description states it was a sale in open market or private transaction involving 18,395 shares at $5.94 per share.

Is HRT FINANCIAL LP a ten percent owner of Profusa (PFSA) according to this filing?

Yes. HRT FINANCIAL LP is identified as a ten percent owner of Profusa, Inc. The reporting person section flags the firm as a 10% owner, though it reported 0 shares held directly after this transaction.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/19/2026 - 03:19 PM Accepted by SEC EDGAR 08/19/2026 - 03:19 PM

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^*

HRT FINANCIAL LP

(Last)

(First)

(Middle)

3 WORLD TRADE CENTER, 175 GREENWICH STRE

76TH FLOOR

(Street)

NEW YORK

10007

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Profusa, Inc. [ PFSA ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/28/2026

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

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

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

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	08/17/2026		S		18,395	D	$5.94	0	D

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:

	Adam Nunes	08/19/2026
	** 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: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR