Topper James N
SEC insider (Form 3/4/5 filer). CIK 0001341382. Director at Attovia Therapeutics, Inc. (ATTO) and 2 other issuers. 16 reported Form 4/5 transactions since Sep 2024; latest on May 19, 2026. Located in SAN CARLOS, CA.
Companies Topper James N has filed insider reports for
- Attovia Therapeutics, Inc. (ATTO): Director
- Phathom Pharmaceuticals, Inc. (PHAT): Director, 10% Owner
- NewAmsterdam Pharma Co N.V. (NAMS): Director
Topper James N
CIK: 0001341382
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (16 total)
- May 19, 2026PHAT
Phathom Pharmaceuticals, Inc.
AwardDirect24.1K shares- - Sep 15, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect660 shares at avg. $23.70$16K - Sep 8, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect1.3K shares at avg. $24.99$31K - Aug 11, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect471 shares at avg. $23.98$11K - Jun 25, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect1.3K shares at avg. $18.26$23K - Jun 24, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect2.5K shares at avg. $18.43$46K - Jun 16, 2025NAMS
NewAmsterdam Pharma Co N.V.
PurchaseIndirect8.6K shares at avg. $19.50$167K - Jun 3, 2025PHAT
Phathom Pharmaceuticals, Inc.
AwardDirect10.5K shares- - May 21, 2025PHAT
Phathom Pharmaceuticals, Inc.
PurchaseIndirect3.8K shares at avg. $3.86$15K - May 14, 2025PHAT
Phathom Pharmaceuticals, Inc.
PurchaseIndirect6.3K shares at avg. $3.32$21K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 19, 2026 |  PHAT Phathom Pharmaceuticals, Inc. | Award | 24,122 | - | $0 | Direct |
| Sep 15, 2025 |  NAMS NewAmsterdam Pharma Co N.V. | Purchase | 660 | $23.70 | $15,639 | Indirect |
| Sep 8, 2025 | NAMS NewAmsterdam Pharma Co N.V. | Purchase | 1,260 | $24.99 | $31,487 | Indirect |
| Aug 11, 2025 | NAMS NewAmsterdam Pharma Co N.V. | Purchase | 471 | $23.98 | $11,294 | Indirect |
| Jun 25, 2025 | NAMS NewAmsterdam Pharma Co N.V. | Purchase | 1,260 | $18.26 | $23,012 | Indirect |
| Jun 24, 2025 | NAMS NewAmsterdam Pharma Co N.V. | Purchase | 2,520 | $18.43 | $46,454 | Indirect |
| Jun 16, 2025 | NAMS NewAmsterdam Pharma Co N.V. | Purchase | 8,584 | $19.50 | $167,381 | Indirect |
| Jun 3, 2025 | PHAT Phathom Pharmaceuticals, Inc. | Award | 10,500 | - | - | Direct |
| May 21, 2025 | PHAT Phathom Pharmaceuticals, Inc. | Purchase | 3,780 | $3.86 | $14,609 | Indirect |
| May 14, 2025 | PHAT Phathom Pharmaceuticals, Inc. | Purchase | 6,300 | $3.32 | $20,919 | Indirect |
1-10 of 16 transactions