James N. Topper serves as Executive at AMICUS THERAPEUTICS INC, where they oversee executive responsibilities. Since joining the company, James N. Topper has executed 985 insider transactions totaling $107.0M, demonstrating a bullish approach to their equity position. Their most recent transaction on Sep 17, 2025 involved transacting 17,199 shares valued at $33.5K.
James N. Topper currently holds 3,028,524 shares of AMICUS THERAPEUTICS INC (FOLD), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, James N. Topper has been a net buyer of FOLD stock. They have purchased $106.6M and sold $370.2K worth of shares.
James N. Topper's most recent insider trade was on Sep 17, 2025, when they sold 17,199 shares at $1.95 per share.
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| $1.95 |
| Discretionary |
| Sep 15, 2025 | NAMS | $15.6K | Purchase | 660 | $23.70 | Discretionary |
| Sep 8, 2025 | NAMS | $31.5K | Purchase | 1,260 | $24.99 | Discretionary |
| Aug 11, 2025 | NAMS | $11.3K | Purchase | 471 | $23.98 | Discretionary |
| May 23, 2024 | PHAT | $0 | Award | 10,500 | $N/A | Discretionary |
| May 18, 2024 | ALPN | $0 | Tender | 2,829,347 | $N/A | Discretionary |
| Apr 25, 2024 | ALPN | $1.2K | Sale | 19 | $64.57 | Discretionary |
| Apr 25, 2024 | ALPN | $0 | Exercise | 1,200,000 | $N/A | Discretionary |
| Mar 26, 2024 | NAMS | $181.2K | Purchase | 8,429 | $21.50 | Discretionary |
| Dec 11, 2023 | ALPN | $1.9M | Exercise | 145,251 | $12.74 | Discretionary |
| May 25, 2023 | PHAT | $0 | Award | 9,000 | $N/A | Discretionary |
| May 3, 2022 | HLVX | $30.0M | Purchase | 1,764,706 | $17.00 | Discretionary |
| May 3, 2022 | HLVX | $37.2M | Conversion | 2,736,234 | $13.60 | Discretionary |
| Sep 17, 2021 | ALPN | $0 | Disposition | 1,200,000 | $N/A | Discretionary |
| May 10, 2021 | ARQT | $0 | Other | 96,574 | $N/A | Discretionary |
| May 10, 2021 | ARQT | $0 | Other | 96,574 | $N/A | Discretionary |
| May 10, 2021 | ARQT | $0 | Other | 2,108,558 | $N/A | Discretionary |
| Nov 16, 2020 | ANAB | $0 | Other | 26,354 | $N/A | Discretionary |
| Nov 16, 2020 | ANAB | $0 | Other | 22,604 | $N/A | Discretionary |
| Nov 16, 2020 | ANAB | $0 | Other | 98,275 | $N/A | Discretionary |
| Nov 16, 2020 | ANAB | $0 | Other | 344,860 | $N/A | Discretionary |
| Nov 16, 2020 | ANAB | $0 | Other | 973,612 | $N/A | Discretionary |
| Mar 31, 2020 | APTX | $10.7K | Award | 4,976 | $2.16 | Discretionary |
| Jul 22, 2019 | MIRM | $6.8M | Purchase | 450,000 | $15.00 | Discretionary |
| Jul 22, 2019 | MIRM | $0 | Conversion | 3,116,912 | $N/A | Discretionary |
| Jan 18, 2019 | ALPN | $2.0M | Purchase | 372,439 | $5.37 | Discretionary |
| Sep 28, 2018 | ETTX | $0 | Conversion | 337,707 | $N/A | Discretionary |
| Sep 28, 2018 | ETTX | $5.6M | Purchase | 375,887 | $15.00 | Discretionary |
| Sep 28, 2018 | ETTX | $0 | Conversion | 320,898 | $N/A | Discretionary |