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NEWAMST PH CO (NAMS)
NASDAQ
$31.41+$0.59 (+1.90%)
Price as of Jun 23, 2026 6:29 PM EDT- $3.5BMarket Cap
- 69.25%1-Year Change
- BiotechnologyIndustry
NEWAMST PH CO (NAMS)
$31.41+$0.59 (+1.90%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 14.49% | 16.9M | 0 (0.00%) | Mar 31, 2026 |
CAPITAL WORLD INVESTORS | 9.50% | 11.1M | +1.1M (+10.13%) | Mar 31, 2026 |
RA CAPITAL MANAGEMENT, L.P. | 8.17% | 9.6M | 0 (0.00%) | Mar 31, 2026 |
FCPM III SERVICES B.V. | 7.87% | 9.2M | 0 (0.00%) | Mar 31, 2026 |
FMR LLC | 7.50% | 8.8M | +2.4M (+26.84%) | Mar 31, 2026 |
BAIN CAPITAL LIFE SCIENCES INVESTORS, LLC | 6.25% | 7.3M | 0 (0.00%) | Mar 31, 2026 |
WELLINGTON MANAGEMENT GROUP LLP | 4.38% | 5.1M | +82,643 (+1.62%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
AMERICAN CENTURY MUTUAL FUNDS, INC. | 0.39% | 453,541 | 0 (0.00%) | Jan 31, 2026 |
PRUDENTIAL SECTOR FUNDS, INC. | 0.30% | 356,147 | 0 (0.00%) | Aug 30, 2024 |
FIDELITY SELECT PORTFOLIOS | 0.21% | 243,700 | 0 (0.00%) | Feb 28, 2026 |
COLUMBIA FUNDS SERIES TRUST I | 0.09% | 100,364 | 0 (0.00%) | Jan 31, 2026 |
MERIDIAN FUND INC | 0.08% | 91,232 | 0 (0.00%) | Mar 31, 2026 |
FIDELITY CONCORD STREET TRUST | 0.04% | 48,337 | 0 (0.00%) | Feb 28, 2026 |
NATIONWIDE MUTUAL FUNDS | 0.04% | 45,074 | 0 (0.00%) | Jan 31, 2026 |
Current Ownership Distribution
- Institutions772.0M (96.88%)
- Insiders17.5M (2.20%)
- Mutual Funds7.3M (0.91%)
- Other0 (0.00%)
Insider Transactions
- 2.20% (17.5M)Current InsiderOwnership (%, shares)
- 1Number of InsiderBuying (last 12 months)
- $111.0MAmount of InsiderBuying (last 12 months)
- 6Number of InsiderSelling (last 12 months)
- $140.0MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
LANGE LOUIS G | Sell | Mar 11, 2026 | $1.3M | 44,173 | $30.41 | 10,806 |
LANGE LOUIS G | Sell | Mar 11, 2026 | $13,928.58 | 446 | $31.23 | 10,360 |
LANGE LOUIS G | In The Money | Mar 09, 2026 | $0.00 | 44,619 | $0.00 | 0 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 09, 2026 | $0.00 | 101,409 | $0.00 | 520,229 |
LANGE LOUIS G | In The Money | Mar 09, 2026 | $513,118.50 | 44,619 | $11.50 | 54,979 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 09, 2026 | $0.00 | 101,409 | $0.00 | 170,711 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Sell | Mar 09, 2026 | $3.1M | 101,409 | $30.29 | 69,302 |
LANGE LOUIS G | Sell | Mar 06, 2026 | $828,950.26 | 28,186 | $29.41 | 0 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 06, 2026 | $0.00 | 94,124 | $0.00 | 163,426 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Sell | Mar 06, 2026 | $2.9M | 94,124 | $30.32 | 69,302 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 06, 2026 | $0.00 | 94,124 | $0.00 | 621,638 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 05, 2026 | $0.00 | 104,467 | $0.00 | 715,762 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Exempt | Mar 05, 2026 | $0.00 | 104,467 | $0.00 | 173,769 |
Kastelein Johannes Jacob Pieter Chief Scientific Officer | Sell | Mar 05, 2026 | $3.2M | 104,467 | $30.30 | 69,302 |
Davidson Michael H. Chief Executive Officer | Exempt | Mar 02, 2026 | $0.00 | 443,707 | $0.00 | 239,267 |
Davidson Michael H. Chief Executive Officer | Exempt | Mar 02, 2026 | $0.00 | 443,707 | $0.00 | 617,851 |
Davidson Michael H. Chief Executive Officer | Sell | Mar 02, 2026 | $14.8M | 443,707 | $33.25 | 174,144 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 26, 2026 | $0.00 | 183,332 | $0.00 | 643,191 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 26, 2026 | $5.6M | 165,408 | $33.63 | 477,783 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 26, 2026 | $617,302.56 | 17,924 | $34.44 | 174,144 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 26, 2026 | $0.00 | 183,332 | $0.00 | 682,974 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 25, 2026 | $0.00 | 58,253 | $0.00 | 518,112 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 25, 2026 | $1.6M | 46,517 | $35.11 | 471,595 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 25, 2026 | $375,278.56 | 10,436 | $35.96 | 461,159 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 25, 2026 | $47,684.00 | 1,300 | $36.68 | 459,859 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 25, 2026 | $0.00 | 58,253 | $0.00 | 866,306 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 24, 2026 | $0.00 | 64,708 | $0.00 | 924,559 |
Davidson Michael H. Chief Executive Officer | Exempt | Feb 24, 2026 | $0.00 | 64,708 | $0.00 | 524,567 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 24, 2026 | $2.2M | 61,547 | $36.13 | 463,020 |
Davidson Michael H. Chief Executive Officer | Sell | Feb 24, 2026 | $115,250.06 | 3,161 | $36.46 | 459,859 |