Oscar Health director sells 31,422 shares

Director Mario Schlosser sold 31,422 OSCR shares on September 3, 2026 under a Rule 10b5-1 plan primarily to cover tax withholding from vesting equity awards.

Rhea-AI Filing Summary

Oscar Health, Inc. (OSCR) director Mario Schlosser reported selling 31,422 shares of Class A Common Stock on September 3, 2026 in an open-market transaction at a weighted average price of $31.45 per share, with individual trades ranging from $30.97 to $31.96.

The sale was effected pursuant to a Rule 10b5-1 instruction letter entered into on August 8, 2025 to satisfy Schlosser’s tax withholding obligation upon vesting of previously granted equity awards. Following this transaction, he reported beneficial ownership of 449,444 shares, which includes shares to be issued upon vesting of restricted stock units.

Insider Trade Summary 10b5-1

Net Seller: 31,422 shares

Net Sell 1 txn

Insider Schlosser Mario

Role Director

Sold 31,422 shs ($988K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2, F3	31,422	$31.45	$988K

Holdings After Transaction: Class A Common Stock — 449,444 shares (Direct)

Footnotes (3)

1. F1. The sale was effected pursuant to a Rule 10b5-1 instruction letter entered into on August 8, 2025 to satisfy the Reporting Person's tax withholding obligation upon the vesting of previously granted equity awards.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.97 to $31.96, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price at which the transactions were effected.
3. F3. Includes shares to be issued in connection with the vesting of one or more restricted stock units.

Key Figures

Shares sold: 31,422 shares Weighted average sale price: $31.45 per share Sale price range: $30.97–$31.96 per share +2 more

5 metrics

Shares sold 31,422 shares Class A Common Stock sale by Mario Schlosser on September 3, 2026

Weighted average sale price $31.45 per share Open-market sale of OSCR Class A Common Stock

Sale price range $30.97–$31.96 per share Multiple transactions comprising the reported sale

Shares beneficially owned after transaction 449,444 shares Mario Schlosser’s reported holdings following the sale, including RSU-related shares

Rule 10b5-1 plan adoption date August 8, 2025 Instruction letter governing the September 3, 2026 sale

Key Terms

Rule 10b5-1, weighted average price, restricted stock units, tax withholding obligation

4 terms

Rule 10b5-1 regulatory

"The sale was effected pursuant to a Rule 10b5-1 instruction letter"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

restricted stock units financial

"Includes shares to be issued in connection with the vesting of one or more restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligation financial

"to satisfy the Reporting Person's tax withholding obligation upon the vesting"

FAQ

What insider transaction did Oscar Health (OSCR) report for Mario Schlosser?

Oscar Health reported that director Mario Schlosser sold 31,422 shares of Class A Common Stock on September 3, 2026 in an open-market transaction at a weighted average price of $31.45 per share.

Was the September 3, 2026 OSCR share sale by Mario Schlosser under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 instruction letter entered into on August 8, 2025, providing for pre-arranged trading instructions.

What was the purpose of Mario Schlosser’s OSCR share sale on September 3, 2026?

The filing explains the sale was made to satisfy tax withholding obligations arising from the vesting of previously granted equity awards, rather than as a discretionary portfolio trade.

What price range did Mario Schlosser receive for the OSCR shares sold?

The weighted average sale price was $31.45 per share. The shares were sold in multiple transactions at prices ranging from $30.97 to $31.96 per share.

How many Oscar Health (OSCR) shares does Mario Schlosser report owning after this sale?

After the reported sale, Mario Schlosser reported beneficial ownership of 449,444 shares of Class A Common Stock, which includes shares to be issued upon vesting of restricted stock units.

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

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Available on EDGAR 09/08/2026 - 04:16 PM Accepted by SEC EDGAR 09/08/2026 - 04:16 PM Learn about SEC filing dates

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).

X

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^*

Schlosser Mario

(Last) (First) (Middle)

75 VARICK STREET, 5TH FLOOR

(Street)

NEW YORK NEW YORK 10013

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Oscar Health, Inc. [ OSCR ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/03/2026		S		31,422(1)	D	$31.45(2)	449,444(3)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale was effected pursuant to a Rule 10b5-1 instruction letter entered into on August 8, 2025 to satisfy the Reporting Person's tax withholding obligation upon the vesting of previously granted equity awards.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.97 to $31.96, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price at which the transactions were effected.

3. Includes shares to be issued in connection with the vesting of one or more restricted stock units.

Remarks:

	/s/ Melissa Curtin, Attorney-in-fact	09/08/2026
	** 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)