Marc L Andreessen - Net Worth and Insider Trading
Marc L Andreessen Net Worth
The estimated net worth of Marc L Andreessen is at least $1.1 Billion dollars as of 2026-09-11. Marc L Andreessen is the 10% Owner of Slack Technologies Inc and owns about 15,324,222 shares of Slack Technologies Inc (WORK) stock worth over $693 Million. Marc L Andreessen is the Director of Coinbase Global Inc and owns about 1,138,892 shares of Coinbase Global Inc (COIN) stock worth over $199 Million. Marc L Andreessen is also the Director of Samsara Inc and owns about 4,657,883 shares of Samsara Inc (IOT) stock worth over $181 Million. Besides these, Marc L Andreessen also holds Meta Platforms Inc (META) , eBay Inc (EBAY) . Details can be seen in Marc L Andreessen's Latest Holdings Summary section.
Disclaimer: The insider information is derived from SEC filings. The estimated net worth is based on the final shares held after open market or private purchases and sales of common stock with a transaction code of "P" or "S" on Form 4, assuming that Marc L Andreessen has not made any transactions after 2026-09-08 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.
Transaction Summary of Marc L Andreessen
Marc L Andreessen Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, Marc L Andreessen owns 21 companies in total, including Accolade Inc (ACCD) , Meta Platforms Inc (META) , and Slack Technologies Inc (WORK) among others .
Click here to see the complete history of Marc L Andreessen’s form 4 insider trades.
Insider Ownership Summary of Marc L Andreessen
| Ticker | Company | Transaction Date | Type of Owner |
|---|---|---|---|
| ACCD | Accolade Inc | 2020-07-01 | 10 percent owner |
| META | Meta Platforms Inc | 2026-08-04 | director |
| WORK | Slack Technologies Inc | 2020-03-13 | 10 percent owner |
| 2019-04-17 | 10 percent owner | ||
| 2019-10-07 | 10 percent owner | ||
| 2015-10-21 | director | ||
| 2017-04-06 | 10 percent owner | ||
| 2013-04-20 | director | ||
| 2012-04-26 | director | ||
| 2021-08-06 | 10 percent owner | ||
| 2026-06-11 | director & 10 percent owner | ||
| 2026-09-08 | director & 10 percent owner | ||
| 2021-09-29 | 10 percent owner | ||
| 2021-06-09 | 10 percent owner | ||
| 2021-12-17 | 10 percent owner | ||
| 2021-10-19 | 10 percent owner | ||
| 2023-02-15 | 10 percent owner | ||
| 2024-10-10 | 10 percent owner | ||
| 2025-10-29 | 10 percent owner | ||
| 2026-08-05 | 10 percent owner | ||
| 2026-07-23 | 10 percent owner |
Marc L Andreessen Latest Holdings Summary
Marc L Andreessen currently owns a total of 5 stocks. Among these stocks, Marc L Andreessen owns 15,324,222 shares of Slack Technologies Inc (WORK) as of January 8, 2020, with a value of $693 Million and a weighting of 61.93%. Marc L Andreessen owns 1,138,892 shares of Coinbase Global Inc (COIN) as of September 8, 2026, with a value of $199 Million and a weighting of 17.78%. Marc L Andreessen also owns 4,657,883 shares of Samsara Inc (IOT) as of June 11, 2026, with a value of $181 Million and a weighting of 16.18%. The other 2 stocks Meta Platforms Inc (META) , eBay Inc (EBAY) have a combined weighting of 4.11% among all his current holdings.
Latest Holdings of Marc L Andreessen
| Ticker | Company | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
|---|---|---|---|---|---|
| WORK | Slack Technologies Inc | 2020-01-08 | 15,324,222 | 45.20 | 692,654,834 |
| COIN | Coinbase Global Inc | 2026-09-08 | 1,138,892 | 174.57 | 198,816,376 |
| IOT | Samsara Inc | 2026-06-11 | 4,657,883 | 38.86 | 181,005,333 |
| META | Meta Platforms Inc | 2026-08-04 | 70,399 | 644.38 | 45,363,708 |
| EBAY | eBay Inc | 2010-02-18 | 5,400 | 106.13 | 573,102 |
Holding Weightings of Marc L Andreessen
Marc L Andreessen Form 4 Trading Tracker
According to the SEC Form 4 filings, Marc L Andreessen has made a total of 0 transactions in Slack Technologies Inc (WORK) over the past 5 years. The most-recent trade in Slack Technologies Inc is the sale of 60,536 shares on January 8, 2020, which brought Marc L Andreessen around $1 Million.
According to the SEC Form 4 filings, Marc L Andreessen has made a total of 3 transactions in Coinbase Global Inc (COIN) over the past 5 years, including 0 buys and 3 sells. The most-recent trade in Coinbase Global Inc is the sale of 13,676 shares on September 8, 2026, which brought Marc L Andreessen around $2 Million.
According to the SEC Form 4 filings, Marc L Andreessen has made a total of 14 transactions in Samsara Inc (IOT) over the past 5 years, including 1 buys and 13 sells. The most-recent trade in Samsara Inc is the sale of 1,113,660 shares on June 11, 2026, which brought Marc L Andreessen around $37 Million.
More details on Marc L Andreessen's insider transactions can be found in the Insider Trading History of Marc L Andreessen table.Insider Trading History of Marc L Andreessen
* The information on this page (including Insider Trading Shares, Share Changes, Cost, etc.) is sourced exclusively from Form 4 filings and does not incorporate any data from 13F or 13D/G filings. As a result, it may differ from the values shown on the Guru page.
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Marc L Andreessen Trading Performance
GuruFocus tracks the stock performance after each of Marc L Andreessen's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by Marc L Andreessen is -14.46%. GuruFocus also compares Marc L Andreessen's trading performance to market benchmark return within the same time period. The performance of stocks bought by Marc L Andreessen within 3 months outperforms 0 times out of 2 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how Marc L Andreessen's insider trading performs compared to the benchmark.
Performance of Marc L Andreessen
Marc L Andreessen Ownership Network
Ownership Network List of Marc L Andreessen
Ownership Network Relation of Marc L Andreessen

Marc L Andreessen Owned Company Details
What does Accolade Inc do?
Who are the key executives at Accolade Inc?
Marc L Andreessen is the 10 percent owner of Accolade Inc. Other key executives at Accolade Inc include President Robert N Cavanaugh , EVP General Counsel Richard Eskew , and Chief Financial Officer Stephen H. Barnes .
Accolade Inc (ACCD) Insider Trades Summary
Over the past 18 months, Marc L Andreessen made no insider transaction in Accolade Inc (ACCD). Other recent insider transactions involving Accolade Inc (ACCD) include a net sale of 1,211 shares made by Rajeev Singh , a net sale of 731 shares made by Robert N Cavanaugh , and a net sale of 573 shares made by Stephen H. Barnes .
In summary, during the past 3 months, insiders sold 0 shares of Accolade Inc (ACCD) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 2,893 shares of Accolade Inc (ACCD) were sold and 0 shares were bought by its insiders, resulting in a net sale of 2,893 shares.
Accolade Inc (ACCD)'s detailed insider trading history can be found in Insider Trading Tracker table.
Accolade Inc Insider Transactions
Marc L Andreessen Mailing Address
Above is the net worth, insider trading, and ownership report for Marc L Andreessen. Based on the public information released on the U.S. Securities and Exchange Commission (SEC) website, Marc L Andreessen's mailing address is: San Francisco Ca 94111.