Mario Schlosser

CTO · Oscar Health, Inc.

Rank #4,791 SEC EDGAR (United States) ↗ Files from United States

Details

Officer and board memberInsuranceOSCRSEC CIK 0001844320

Computed from SEC EDGAR filings and closing prices — not copied from any wealth ranking. Dataset . How we calculate this.

Disclosed holdings
$16.9M
1-day change
▼ 0.02%
Positions on file
3
issuers disclosed in Forms 3/4/5 and Schedules 13D/G

Disclosed holdings over time 53 weekly points

What the 2 currently disclosed positions would have been worth at each week’s closing price. A rising line means the shares got more valuable, not that this person bought more.

How the line is built

Share counts are as last reported to the SEC and held constant; only prices move.

2025-09-05$5.9M – $17.2M2026-09-04

Insider activity Jun 1, 2024 – Mar 2, 2026

Mario Schlosser is recorded in filings to the U.S. SEC via EDGAR as officer and board member, and reported 34 transactions between Jun 1, 2024 and Mar 2, 2026. The buy and sell totals below count only codes P, S.

Why the other codes are excluded

Share awards (A), shares withheld to pay tax (F), option exercises (M) and gifts (G) also appear in the table, but they are consequences of a pay package or a private transfer, not a decision to buy or sell on the open market. Counting them would turn this into a compensation ranking.

Open-market buys (code P)
None
0 purchases on file
Open-market sales (code S)
$20.19M
17 sales on file priced rows only
All reported transactions
34
every code, including awards and exercises
Pattern
Net seller in the final 12 months of the window
last 12 months of the window

Events from filings

Detected automatically in the filings linked below. Each headline is built from the numbers in those filings, not written by a model. Newest first; events older than 45 days stay listed and are marked as older.

Mario Schlosser sold 600,000 Oscar Health, Inc. (OSCR) shares for $18,204,000 on Aug 27, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Mario Schlosser sold 600,000 Oscar Health, Inc. (OSCR) shares for $18,204,000 on Aug 27, 2026
Date Insider Transaction Shares Price Value Filing
Aug 27, 2026 Mario Schlosser S Open-market sale 600,000 held after: 480,866 $30.34 $18,204,000 SEC filing ↗

Summary written by an AI model from the filing data above (model: gemini-3.5-flash):

On 2026-08-27, Mario Schlosser, the President of Technology & CTO of Oscar Health, Inc., conducted an open-market sale of 600,000 shares of Class A Common Stock.

The transaction was executed at $30.34 per share, for a total value of $18,204,000. Following this transaction, Schlosser holds 480,866 shares of the company.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mario Schlosser sold 878,201 Oscar Health, Inc. (OSCR) shares for $25,796,383 on Jun 23, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Mario Schlosser sold 878,201 Oscar Health, Inc. (OSCR) shares for $25,796,383 on Jun 23, 2026
Date Insider Transaction Shares Price Value Filing
Jun 23, 2026 Mario Schlosser S Open-market sale 286,988 held after: 1,073,878 $28.95 $8,308,303 SEC filing ↗
Jun 23, 2026 Mario Schlosser S Open-market sale 591,213 held after: 482,665 $29.58 $17,488,081 SEC filing ↗

Total of the rows above: $25,796,383, in the currency the filings report.

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mario Schlosser sold 24,335 Oscar Health, Inc. (OSCR) shares for $325,846 on Mar 2, 2026

Unusual change in a direct holding

Flagged because the change that day in the shares this person holds directly was unusually large compared with their own earlier changes. The rows below are the open-market trades reported that day; under each share count is the balance the filing reports after that line.

Mario Schlosser sold 24,335 Oscar Health, Inc. (OSCR) shares for $325,846 on Mar 2, 2026
Date Insider Transaction Shares Price Value Filing
Mar 2, 2026 Mario Schlosser S Open-market sale 24,335 held after: 514,986 $13.39 $325,846 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mario Schlosser sold 96,928 Oscar Health, Inc. (OSCR) shares for $1,515,954 on Jan 5, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Mario Schlosser sold 96,928 Oscar Health, Inc. (OSCR) shares for $1,515,954 on Jan 5, 2026
Date Insider Transaction Shares Price Value Filing
Jan 5, 2026 Mario Schlosser S Open-market sale 96,928 held after: 350,180 $15.64 $1,515,954 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mario Schlosser sold 137,933 Oscar Health, Inc. (OSCR) shares for $2,071,754 on Jan 2, 2026

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Mario Schlosser sold 137,933 Oscar Health, Inc. (OSCR) shares for $2,071,754 on Jan 2, 2026
Date Insider Transaction Shares Price Value Filing
Jan 2, 2026 Mario Schlosser S Open-market sale 137,933 held after: 360,215 $15.02 $2,071,754 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Mario Schlosser sold 105,300 Oscar Health, Inc. (OSCR) shares for $1,584,765 on Nov 12, 2025

Large trade for this person

Flagged because this trade was large compared with this person’s own earlier open-market trades in the same currency — not because it is large in absolute terms. A trade that is routine for one insider can be flagged for another.

Mario Schlosser sold 105,300 Oscar Health, Inc. (OSCR) shares for $1,584,765 on Nov 12, 2025
Date Insider Transaction Shares Price Value Filing
Nov 12, 2025 Mario Schlosser S Open-market sale 105,300 held after: 501,148 $15.05 $1,584,765 SEC filing ↗

Source: SEC EDGAR (United States); every row links to where it was published. Event computed Sep 14, 2026.

Reported transactions

Price 0.00 is a real reported figure on gifts (G) and share awards (A) — not a missing number. The 25 most recent rows are grouped into 11 lines by date, company and transaction type — open a line to see every lot with its own source link. We hold 61 on file in total. See the full history on EDGAR ↗

How to read this list

Every row is one line of one Form 4 or Form 5, with the filing it came from. Where the record carries no price at all we leave the cell empty instead of guessing one.

The shares and money on a grouped line add up only the lots listed inside that line, and only when every one of them carries the figure. Where a group mixes more than one reporting currency we leave the money blank rather than convert — no source publishes the rate that conversion would need.

  1. Oscar Health, Inc. OSCR S Open-market sale 31,422 shares $988.2K at $31.45 SEC filing ↗
  2. Oscar Health, Inc. OSCR S Open-market sale 150,000 shares $4.62M at $30.79 SEC filing ↗
  3. Oscar Health, Inc. OSCR C Conversion of derivativenot a buy/sell decisionreported at zero 150,000 shares $0 at $0.00 SEC filing ↗
  4. Oscar Health, Inc. OSCR S Open-market sale 600,000 shares $18.20M at $30.34 SEC filing ↗
  5. Oscar Health, Inc. OSCR C Conversion of derivativenot a buy/sell decisionreported at zero 600,000 shares $0 at $0.00 SEC filing ↗
  6. Duolingo, Inc. DUOL A Grant or awardnot a buy/sell decision 140 shares $17.5K at $124.76 SEC filing ↗
  7. Oscar Health, Inc. OSCR S Open-market sale × 3 47,500 shares $1.48M
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    30,228 $31.65 $956.7K SEC filing ↗
    13,672 $30.80 $421.1K SEC filing ↗
    3,600 $29.50 $106.2K SEC filing ↗
  8. Oscar Health, Inc. OSCR C Conversion of derivativenot a buy/sell decisionreported at zero 47,500 shares $0 at $0.00 SEC filing ↗
  9. Oscar Health, Inc. OSCR S Open-market sale × 11 1,027,398 shares $30.18M
    The 11 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    97 $30.09 $2.9K SEC filing ↗
    31,912 $29.58 $944.0K SEC filing ↗
    15,491 $28.95 $448.5K SEC filing ↗
    33,592 $29.58 $993.7K SEC filing ↗
    16,306 $28.95 $472.1K SEC filing ↗
    102 $30.09 $3.1K SEC filing ↗
    33,591 $29.58 $993.6K SEC filing ↗
    16,307 $28.95 $472.1K SEC filing ↗
    1,799 $30.09 $54.1K SEC filing ↗
    591,213 $29.58 $17.49M SEC filing ↗
    286,988 $28.95 $8.31M SEC filing ↗
  10. Oscar Health, Inc. OSCR C Conversion of derivative × 3not a buy/sell decisionreported at zero 977,500 shares $0
    The 3 lots that make up this line, each with the source behind it.
    Shares Price Value Filing
    47,500 $0.00reported at zero $0 SEC filing ↗
    50,000 $0.00reported at zero $0 SEC filing ↗
    880,000 $0.00reported at zero $0 SEC filing ↗
  11. Duolingo, Inc. DUOL A Grant or awardnot a buy/sell decisionreported at zero 2,001 shares $0 at $0.00 SEC filing ↗

Disclosed holdings

Shares is the amount on the form; value is that amount times the closing price shown. Rows with no closing price are left blank, so they may add up to less than the headline figure.

What is not counted here

Each row is one filing you can open. Private companies, real estate, bonds and crypto are not in SEC insider filings and are therefore not counted here.

Equity positions disclosed to the SEC, with the source filing behind each row.
Issuer Ticker Security Shares Close Value Form Reported Filing
Oscar Health, Inc. OSCR Class A Common Stock 514,986 $32.25 $16.6M 4 EDGAR ↗
Duolingo, Inc. DUOL Class A Common Stock 2,121 $154.46 $327.6K 4 EDGAR ↗
Duolingo, Inc. Restricted Stock Units 1,742 4 EDGAR ↗

Other insiders at the same companies

People who also file with the SEC at a company where Mario Schlosser reports shares.

Sharing a filing does not mean they work together day to day — it means both names appear on the same issuer’s insider record.

Sources

The filings linked in the tables above are the sources for every figure on this page.

Think a number here is wrong? Open the linked filing and compare — how to report it.

Profile record last refreshed Sep 8, 2026.