James N Topper - Net Worth and Insider Trading

James N Topper Net Worth

The estimated net worth of James N Topper is at least $444 Million dollars as of 2024-11-13. James N Topper is the Director of Alpine Immune Sciences Inc and owns about 2,829,347 shares of Alpine Immune Sciences Inc (ALPN) stock worth over $184 Million. James N Topper is the Director of NewAmsterdam Pharma Co NV and owns about 6,809,429 shares of NewAmsterdam Pharma Co NV (NAMS) stock worth over $169 Million. James N Topper is also the Director, 10% Owner of AnaptysBio Inc and owns about 3,571,212 shares of AnaptysBio Inc (ANAB) stock worth over $77 Million. Besides these, James N Topper also holds Sierra Oncology Inc (SRRA) , Entasis Therapeutics Holdings Inc (ETTX) , Aptinyx Inc (APTX) , Allena Pharmaceuticals Inc (ALNAQ) . Details can be seen in James N Topper'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 N Topper has not made any transactions after 2024-04-25 and currently still holds the listed stock(s). Please note that this estimate may not reflect the actual net worth.

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Transaction Summary of James N Topper

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James N Topper Insider Ownership Reports

Based on ownership reports from SEC filings, as the reporting owner, James N Topper owns 19 companies in total, including Tarsus Pharmaceuticals Inc (TARS) , Phathom Pharmaceuticals Inc (PHAT) , and Aptinyx Inc (APTX) among others .

Click here to see the complete history of James N Topper’s form 4 insider trades.

Insider Ownership Summary of James N Topper

Ticker Comapny Transaction Date Type of Owner
TARS Tarsus Pharmaceuticals Inc 2020-10-15 10 percent owner
PHAT Phathom Pharmaceuticals Inc 2019-10-24 director & 10 percent owner
APTX Aptinyx Inc 2018-06-25 director & 10 percent owner
LIMIT LIMIT 2020-02-27 10 percent owner
LIMIT LIMIT 2018-05-11 director
LIMIT LIMIT 2020-01-30 10 percent owner
LIMIT LIMIT 2018-09-28 director & 10 percent owner
LIMIT LIMIT 2024-04-25 director
LIMIT LIMIT 2019-07-17 10 percent owner
LIMIT LIMIT 2017-11-06 director & 10 percent owner
LIMIT LIMIT 2017-02-14 director
LIMIT LIMIT 2015-06-24 10 percent owner
LIMIT LIMIT 2015-05-06 10 percent owner
LIMIT LIMIT 2007-06-27 director & 10 percent owner
LIMIT LIMIT 2013-06-05 director
LIMIT LIMIT 2005-12-14 director
LIMIT LIMIT 2020-12-08 director & Chief Executive Officer
LIMIT LIMIT 2022-04-28 10 percent owner
LIMIT LIMIT 2020-12-08 director & Chief Executive Officer

James N Topper Latest Holdings Summary

James N Topper currently owns a total of 7 stocks. Among these stocks, James N Topper owns 2,829,347 shares of Alpine Immune Sciences Inc (ALPN) as of April 25, 2024, with a value of $184 Million and a weighting of 41.42%. James N Topper owns 6,809,429 shares of NewAmsterdam Pharma Co NV (NAMS) as of March 26, 2024, with a value of $169 Million and a weighting of 38.01%. James N Topper also owns 3,571,212 shares of AnaptysBio Inc (ANAB) as of January 31, 2017, with a value of $77 Million and a weighting of 17.32%. The other 4 stocks Sierra Oncology Inc (SRRA) , Entasis Therapeutics Holdings Inc (ETTX) , Aptinyx Inc (APTX) , Allena Pharmaceuticals Inc (ALNAQ) have a combined weighting of 3.25% among all his current holdings.

Latest Holdings of James N Topper

Ticker Comapny Latest Transaction Date Shares Owned Current Price ($) Current Value ($)
ALPN Alpine Immune Sciences Inc 2024-04-25 2,829,347 64.97 183,822,675
NAMS NewAmsterdam Pharma Co NV 2024-03-26 6,809,429 24.77 168,669,556
ANAB AnaptysBio Inc 2017-01-31 3,571,212 21.52 76,852,482
SRRA Sierra Oncology Inc 2017-02-14 202,803 54.99 11,152,137
ETTX Entasis Therapeutics Holdings Inc 2018-09-28 1,349,953 2.19 2,956,397
APTX Aptinyx Inc 2018-06-25 3,190,079 0.10 306,248
ALNAQ Allena Pharmaceuticals Inc 2017-11-06 3,330,373 0.00 0

Holding Weightings of James N Topper


James N Topper Form 4 Trading Tracker

According to the SEC Form 4 filings, James N Topper has made a total of 1 transactions in Alpine Immune Sciences Inc (ALPN) over the past 5 years, including 0 buys and 1 sells. The most-recent trade in Alpine Immune Sciences Inc is the sale of 19 shares on April 25, 2024, which brought James N Topper around $1,227.

According to the SEC Form 4 filings, James N Topper has made a total of 1 transactions in NewAmsterdam Pharma Co NV (NAMS) over the past 5 years, including 1 buys and 0 sells. The most-recent trade in NewAmsterdam Pharma Co NV is the acquisition of 8,429 shares on March 26, 2024, which cost James N Topper around $181,224.

According to the SEC Form 4 filings, James N Topper has made a total of 0 transactions in AnaptysBio Inc (ANAB) over the past 5 years. The most-recent trade in AnaptysBio Inc is the acquisition of 400,000 shares on January 31, 2017, which cost James N Topper around $6 Million.

More details on James N Topper's insider transactions can be found in the Insider Trading History of James N Topper table.

Insider Trading History of James N Topper

No transactions are available. GuruFocus only tracks and displays the purchase and sale of non-derivative security in open market or private transactions from SEC filings with the transaction code of P or S.
Total 0
  • 1
Only the transactions in Open Market or Private Sale at the market prices are included. Other transactions such as conversion of derivative security or exercise of options are not included. Insiders are limited to only officers and/or directors of the company.

James N Topper Trading Performance

GuruFocus tracks the stock performance after each of James N Topper's buying transactions within different timeframes. To be detailed, the average return of stocks after 3 months bought by James N Topper is 3.31%. GuruFocus also compares James N Topper's trading performance to market benchmark return within the same time period. The performance of stocks bought by James N Topper within 3 months outperforms 3 times out of 7 transactions in total compared to the return of S&P 500 within the same period.

You can select different timeframes to see how James N Topper's insider trading performs compared to the benchmark.

Please note GuruFocus will not track the insiders’ transaction performance if he/she does not have buying transactions.

Performance of James N Topper

Average Return

LIMIT
Average return per transaction

Outperforming Transactions

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2 out of 6 outperforming transactions.
Each transaction is measured over a period and compared to .
1 Month 3 Months 6 Months 1 Year 2 Years 3 Years
Return(%) 6.05 LIMIT LIMIT LIMIT LIMIT LIMIT
Relative Return to S&P 500(%) 5.31 LIMIT LIMIT LIMIT LIMIT LIMIT

James N Topper Ownership Network

Ownership Network List of James N Topper

No Data

Ownership Network Relation of James N Topper

Insider Network Chart

James N Topper Owned Company Details

What does Tarsus Pharmaceuticals Inc do?

Who are the key executives at Tarsus Pharmaceuticals Inc?

James N Topper is the 10 percent owner of Tarsus Pharmaceuticals Inc. Other key executives at Tarsus Pharmaceuticals Inc include See Remarks Jeffrey S Farrow , Chief Human Resources Officer Dianne C. Whitfield , and General Counsel Bryan Wahl .

Tarsus Pharmaceuticals Inc (TARS) Insider Trades Summary

Over the past 18 months, James N Topper made no insider transaction in Tarsus Pharmaceuticals Inc (TARS). Other recent insider transactions involving Tarsus Pharmaceuticals Inc (TARS) include a net sale of 231,415 shares made by Bobak R. Azamian , a net sale of 11,909 shares made by Aziz Mottiwala , and a net sale of 12,792 shares made by Bryan Wahl .

In summary, during the past 3 months, insiders sold 0 shares of Tarsus Pharmaceuticals Inc (TARS) in total and bought 0 shares, with a net sale of 0 shares. During the past 18 months, 322,965 shares of Tarsus Pharmaceuticals Inc (TARS) were sold and 10,506 shares were bought by its insiders, resulting in a net sale of 312,459 shares.

Tarsus Pharmaceuticals Inc (TARS)'s detailed insider trading history can be found in Insider Trading Tracker table.

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Tarsus Pharmaceuticals Inc Insider Transactions

No Available Data

James N Topper Mailing Address

Above is the net worth, insider trading, and ownership report for James N Topper. You might contact James N Topper via mailing address: 550 Hamilton Avenue, Suite 100, Palo Alto Ca 94301.