James N Topper Net Worth
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James N Topper has an estimated net worth of at least $108.0 million*, as of Oct. 29, 2025. They own 3.0 million shares of NAMS stock. They have sold 19 shares of NAMS stock since 2021, for an estimated $-586,214.
James N Topper $NAMS SEC Form 4 Insider Trading
James N Topper has filed a total of 9 insider trades in $NAMS since 2021. Their most recent trade was a purchase of 660 shares, made on Sep 15, 2025. Their largest trade was a purchase of 8,584 shares, made on Jun 16, 2025. We estimate that they now own 3.0 million shares of $NAMS, worth an estimated $108.6 million.
Insider Trading at $NAMS
There have been a total of 75 insider trades reported at $NAMS since 2021, with 44,428 shares purchased and 2.9 million shares sold. The most active insider traders in $NAMS stock have been Douglas F Kling, Louise Frederika Kooij, and Johannes Jacob Pieter Kastelein. The most recent trade was a sale of 75,117 shares reported by Louise Frederika Kooij (Chief Accounting Officer), made on Dec 23, 2025.
History of Insider Stock Trades by James N Topper
| Company Ticker | Purchase / Sale | Shares | Date | Disclosed (EST) |
|---|---|---|---|---|
NAMS
|
Purchase | 660 | Sep 15, 2025 | Sept. 17, 2025, 5:22 p.m. |
|
NAMS
|
Purchase | 1,260 | Sep 08, 2025 | Sept. 10, 2025, 5:19 p.m. |
|
NAMS
|
Purchase | 471 | Aug 11, 2025 | Aug. 13, 2025, 4:49 p.m. |
|
NAMS
|
Purchase | 1,260 | Jun 25, 2025 | June 26, 2025, 7:41 p.m. |
|
NAMS
|
Purchase | 2,520 | Jun 24, 2025 | June 26, 2025, 7:41 p.m. |
|
NAMS
|
Purchase | 8,584 | Jun 16, 2025 | June 18, 2025, 4:42 p.m. |
PHAT
|
Purchase | 3,780 | May 21, 2025 | May 23, 2025, 4:06 p.m. |
|
PHAT
|
Purchase | 1,120 | May 13, 2025 | May 15, 2025, 4:17 p.m. |
|
PHAT
|
Purchase | 6,300 | May 14, 2025 | May 15, 2025, 4:17 p.m. |
|
PHAT
|
Purchase | 33,376 | May 09, 2025 | May 13, 2025, 4:13 p.m. |
|
PHAT
|
Purchase | 2,226 | May 09, 2025 | May 13, 2025, 4:13 p.m. |
|
PHAT
|
Purchase | 12,601 | May 12, 2025 | May 13, 2025, 4:13 p.m. |
|
NAMS
|
Purchase | 1,135 | Mar 26, 2025 | March 28, 2025, 5:36 p.m. |
|
NAMS
|
Purchase | 4,005 | Mar 04, 2025 | March 6, 2025, 6:32 p.m. |
ALPN
|
Sale | 19 | Apr 25, 2024 | April 29, 2024, 4:32 p.m. |
|
NAMS
|
Purchase | 8,429 | Mar 26, 2024 | March 28, 2024, 4:30 p.m. |
$NAMS Executives and Stock Owners with Insider Trades
-
Douglas F Kling, Chief Operating Officer
-
Louise Frederika Kooij, Chief Accounting Officer
-
Johannes Jacob Pieter Kastelein, Chief Scientific Officer
-
Mayur Ian Somaiya, Chief Financial Officer
-
Michael H. Davidson, Chief Executive Officer
-
Juliette Berangere Audet, Chief Business Officer
*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.