James N Topper - Net Worth and Insider Trading

James N Topper Net Worth

The estimated net worth of James N Topper is at least $391 Million dollars as of 2024-04-16. James N Topper is the Director, 10% Owner of Alpine Immune Sciences Inc and owns about 2,571,450 shares of Alpine Immune Sciences Inc (ALPN) stock worth over $166 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 $135 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 $76 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 assumption that James N Topper has not made any transactions after 2024-03-26 and currently still holds the listed stock(s).

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 () , Phathom Pharmaceuticals Inc () , and Aptinyx Inc () 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
Tarsus Pharmaceuticals Inc 2020-10-15 10 percent owner
Phathom Pharmaceuticals Inc 2019-10-24 director & 10 percent owner
Aptinyx Inc 2018-06-25 director & 10 percent owner
Passage Bio Inc 2020-02-27 10 percent owner
AnaptysBio Inc 2018-05-11 director
Arcutis Biotherapeutics Inc 2020-01-30 10 percent owner
Entasis Therapeutics Holdings Inc 2018-09-28 director & 10 percent owner
Alpine Immune Sciences Inc 2019-01-18 director
Mirum Pharmaceuticals Inc 2019-07-17 10 percent owner
Allena Pharmaceuticals Inc 2017-11-06 director & 10 percent owner
Sierra Oncology Inc 2017-02-14 director
Glaukos Corp 2015-06-24 10 percent owner
Collegium Pharmaceutical Inc 2015-05-06 10 percent owner
Amicus Therapeutics Inc 2007-06-27 director & 10 percent owner
Portola Pharmaceuticals Inc 2013-06-05 director
La Jolla Pharmaceutical Co 2005-12-14 director
Frazier Lifesciences Acquisition Corp 2020-12-08 director & Chief Executive Officer
HilleVax Inc 2022-04-28 10 percent owner
Frazier Lifesciences Acquisition Corp 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 2,571,450 shares of Alpine Immune Sciences Inc (ALPN) as of January 18, 2019, with a value of $166 Million and a weighting of 42.36%. James N Topper owns 6,809,429 shares of NewAmsterdam Pharma Co NV (NAMS) as of March 26, 2024, with a value of $135 Million and a weighting of 34.53%. James N Topper also owns 3,571,212 shares of AnaptysBio Inc (ANAB) as of January 31, 2017, with a value of $76 Million and a weighting of 19.42%. 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 3.69% 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 2019-01-18 2,571,450 64.42 165,652,809
NAMS NewAmsterdam Pharma Co NV 2024-03-26 6,809,429 19.83 135,030,977
ANAB AnaptysBio Inc 2017-01-31 3,571,212 21.27 75,959,679
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 0 transactions in Alpine Immune Sciences Inc (ALPN) over the past 5 years. The most-recent trade in Alpine Immune Sciences Inc is the acquisition of 372,439 shares on January 18, 2019, which cost James N Topper around $2 Million.

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 6.04%. 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 6 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 Relative Return

72.96%

Average relative return per transaction

Outperforming Transactions

33%

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
Relative Return(%) 7.59 6.04 4.74 72.96 3.62 -25.2
Relative Return to S&P 500(%) 6.4 3.96 2.74 59.73 -6.2 -39.58

James N Topper Ownership Network

Ownership Network List of James N Topper

No Data

Ownership Network Relation of James N Topper


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 Chief Human Resources Officer Dianne C. Whitfield , General Counsel Bryan Wahl , and Chief Operating Officer Seshadri Neervannan .

Tarsus Pharmaceuticals Inc () Insider Trades Summary

Over the past 18 months, James N Topper made no insider transaction in Tarsus Pharmaceuticals Inc (). Other recent insider transactions involving Tarsus Pharmaceuticals Inc () include a net sale of 354,867 shares made by Bobak R. Azamian , a net sale of 36,966 shares made by Leonard M. Greenstein , and a net sale of 20,877 shares made by Aziz Mottiwala .

In summary, during the past 3 months, insiders sold 28,810 shares of Tarsus Pharmaceuticals Inc () in total and bought 0 shares, with a net sale of 28,810 shares. During the past 18 months, 463,842 shares of Tarsus Pharmaceuticals Inc () were sold and 10,506 shares were bought by its insiders, resulting in a net sale of 453,336 shares.

Tarsus Pharmaceuticals Inc ()'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.

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