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NEWAMST PH CO (NAMS)
NASDAQ
$27.87$0.00 (0.00%)
Price as of Aug 21, 2026 7:30 PM EDT- $3.1BMarket Cap
- 11.48%1-Year Change
- BiotechnologyIndustry
NEWAMST PH CO (NAMS)
$27.87$0.00 (0.00%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 15.47% | 18.1M | +1.1M (+6.33%) | Jun 30, 2026 |
CAPITAL WORLD INVESTORS | 10.46% | 12.2M | +1.1M (+9.17%) | Jun 30, 2026 |
FMR LLC | 8.84% | 10.3M | +1.6M (+15.22%) | Jun 30, 2026 |
RA CAPITAL MANAGEMENT, L.P. | 8.17% | 9.6M | 0 (0.00%) | Jun 30, 2026 |
FCPM III SERVICES B.V. | 7.26% | 8.5M | -708,547 (-8.35%) | Jun 30, 2026 |
DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 3.65% | 4.3M | 0 (0.00%) | Jun 30, 2026 |
VIKING GLOBAL INVESTORS LP | 3.60% | 4.2M | 0 (0.00%) | Jun 30, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
AMERICAN CENTURY MUTUAL FUNDS, INC. | 0.37% | 432,256 | -21,285 (-4.92%) | Apr 30, 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%) | May 31, 2026 |
ALPS ETF Trust | 0.10% | 118,514 | +17,451 (+14.72%) | May 31, 2026 |
COLUMBIA FUNDS SERIES TRUST I | 0.09% | 100,364 | 0 (0.00%) | Apr 30, 2026 |
MERIDIAN FUND INC | 0.08% | 91,232 | 0 (0.00%) | Mar 31, 2026 |
PRINCIPAL FUNDS, INC. | 0.07% | 87,095 | +3,557 (+4.08%) | Apr 30, 2026 |
Current Ownership Distribution
- Institutions897.1M (97.06%)
- Insiders17.5M (1.89%)
- Mutual Funds9.7M (1.05%)
- Other0 (0.00%)
Insider Transactions
- 1.89% (17.5M)Current InsiderOwnership (%, shares)
- 0Number of InsiderBuying (last 12 months)
- $0.00Amount of InsiderBuying (last 12 months)
- 5Number of InsiderSelling (last 12 months)
- $137.1MAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jul 20, 2026 | $0.00 | 25,000 | $0.00 | 10,000 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jul 20, 2026 | $0.00 | 80,000 | $0.00 | 70,494 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jul 20, 2026 | $297,500.00 | 25,000 | $11.90 | 49,353 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jul 20, 2026 | $893,600.00 | 80,000 | $11.17 | 129,353 |
Kooij Louise Frederika Chief Accounting Officer | Sell | Jul 20, 2026 | $2.1M | 70,200 | $29.96 | 59,153 |
Kooij Louise Frederika Chief Accounting Officer | Sell | Jul 20, 2026 | $990,029.25 | 31,885 | $31.05 | 27,268 |
Kooij Louise Frederika Chief Accounting Officer | Sell | Jul 20, 2026 | $92,434.65 | 2,915 | $31.71 | 24,353 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jun 22, 2026 | $0.00 | 25,000 | $0.00 | 43,134 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jun 22, 2026 | $0.00 | 15,000 | $0.00 | 35,000 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jun 22, 2026 | $272,500.00 | 25,000 | $10.90 | 49,353 |
Kooij Louise Frederika Chief Accounting Officer | Exempt | Jun 22, 2026 | $178,500.00 | 15,000 | $11.90 | 64,353 |
Kooij Louise Frederika Chief Accounting Officer | Sell | Jun 22, 2026 | $1.2M | 39,700 | $30.20 | 24,653 |
Kooij Louise Frederika Chief Accounting Officer | Sell | Jun 22, 2026 | $9,219.00 | 300 | $30.73 | 24,353 |
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 |