James B. Tananbaum - Net Worth and Insider Trading
James B. Tananbaum Net Worth
The estimated net worth of James B. Tananbaum is at least $164 Million dollars as of 2024-12-27. James B. Tananbaum is the Director, 10% Owner of Alumis Inc and owns about 15,152,954 shares of Alumis Inc (ALMS) stock worth over $127 Million. James B. Tananbaum is also the Director, 10% Owner of Kinnate Biopharma Inc and owns about 13,718,311 shares of Kinnate Biopharma Inc (KNTE) stock worth over $36 Million. Details can be seen in James B. Tananbaum'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 James B. Tananbaum has not made any transactions after 2024-07-01 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.
Transaction Summary of James B. Tananbaum
James B. Tananbaum Insider Ownership Reports
Based on ownership reports from SEC filings, as the reporting owner, James B. Tananbaum owns 11 companies in total, including FS Development Corp (FSDC) , 10x Genomics Inc (TXG) , and Aerie Pharmaceuticals Inc (AERI) among others .
Click here to see the complete history of James B. Tananbaum’s form 4 insider trades.
Insider Ownership Summary of James B. Tananbaum
| Ticker | Comapny | Transaction Date | Type of Owner |
|---|---|---|---|
| FSDC | FS Development Corp | 2020-08-14 | director & 10 percent owner & President & CEO |
| TXG | 10x Genomics Inc | 2020-03-04 | 10 percent owner |
| AERI | Aerie Pharmaceuticals Inc | 2016-07-22 | 10 percent owner |
 | | 2016-08-18 | 10 percent owner |
| | 2016-05-05 | 10 percent owner |
| | 2021-02-05 | 10 percent owner |
| | 2023-05-08 | director & 10 percent owner |
| | 2021-06-10 | director |
| | 2021-10-04 | director & 10 percent owner |
| | 2021-12-23 | director & 10 percent owner |
| | 2022-06-09 | 10 percent owner |
James B. Tananbaum Latest Holdings Summary
James B. Tananbaum currently owns a total of 2 stocks. Among these stocks, James B. Tananbaum owns 15,152,954 shares of Alumis Inc (ALMS) as of July 1, 2024, with a value of $127 Million and a weighting of 77.8%. James B. Tananbaum also owns 13,718,311 shares of Kinnate Biopharma Inc (KNTE) as of May 8, 2023, with a value of $36 Million and a weighting of 22.2%.
Latest Holdings of James B. Tananbaum
| Ticker | Comapny | Latest Transaction Date | Shares Owned | Current Price ($) | Current Value ($) |
|---|---|---|---|---|---|
| ALMS | Alumis Inc | 2024-07-01 | 15,152,954 | 8.41 | 127,436,343 |
| KNTE | Kinnate Biopharma Inc | 2023-05-08 | 13,718,311 | 2.65 | 36,353,524 |
Holding Weightings of James B. Tananbaum
James B. Tananbaum Form 4 Trading Tracker
According to the SEC Form 4 filings, James B. Tananbaum has made a total of 1 transactions in Alumis Inc (ALMS) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in Alumis Inc is the acquisition of 2,500,000 shares on July 1, 2024, which cost James B. Tananbaum around $40 Million.
According to the SEC Form 4 filings, James B. Tananbaum has made a total of 2 transactions in Kinnate Biopharma Inc (KNTE) over the past 5 years, including 2 buys and 0 sells. The most-recent trade in Kinnate Biopharma Inc is the acquisition of 1,780,000 shares on May 8, 2023, which cost James B. Tananbaum around $5 Million.
Insider Trading History of James B. Tananbaum
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James B. Tananbaum Trading Performance
GuruFocus tracks the stock performance after each of James B. Tananbaum's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by James B. Tananbaum is -13.97%. GuruFocus also compares James B. Tananbaum's trading performance to market benchmark return within the same time period. The performance of stocks bought by James B. Tananbaum within 3 months outperforms 0 times out of 3 transactions in total compared to the return of S&P 500 within the same period.
You can select different timeframes to see how James B. Tananbaum's insider trading performs compared to the benchmark.
Performance of James B. Tananbaum
Average Return
Outperforming Transactions
| 1 Month | 3 Months | 6 Months | 1 Year | 2 Years | 3 Years | |
|---|---|---|---|---|---|---|
| Return(%) | 7.81 | | | | | |
| Relative Return to S&P 500(%) | 5.92 | | | | | |
James B. Tananbaum Ownership Network
James B. Tananbaum Owned Company Details
What does FS Development Corp do?
Who are the key executives at FS Development Corp?
James B. Tananbaum is the director & 10 percent owner & President & CEO of FS Development Corp. Other key executives at FS Development Corp include 10 percent owner Foresite Capital Fund V, L.p. , 10 percent owner Foresite Capital Management V, Llc , and 10 percent owner Fs Development Holdings, Llc .
FS Development Corp (FSDC) Insider Trades Summary
In summary, during the past 3 months, insiders sold 0 shares of FS Development Corp (FSDC) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 0 shares of FS Development Corp (FSDC) were sold and 0 shares were bought by its insiders, resulting in a net sale of 0 shares.
FS Development Corp (FSDC)'s detailed insider trading history can be found in Insider Trading Tracker table.
FS Development Corp Insider Transactions
James B. Tananbaum Mailing Address
Above is the net worth, insider trading, and ownership report for James B. Tananbaum. You might contact James B. Tananbaum via mailing address: 3052 Pacific Avenue, San Francisco Ca 94115.
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