BLAIR WILLIAM & CO/IL
Top Portfolio Positions
1,180 positions ·
$28,862,391,577 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| AAPL |
Apple Inc.
Technology
|
5,930,914 | $1,505,206,664 | 5.22% | |
| MSFT |
Microsoft Corp
Technology
|
3,498,110 | $1,294,895,378 | 4.49% | |
| AMZN |
Amazon Com Inc
Consumer Cyclical
|
6,057,938 | $1,261,686,747 | 4.37% | |
| NVDA |
Nvidia Corp
Technology
|
5,427,875 | $946,621,400 | 3.28% | |
| GOOGL |
Alphabet Inc.
Communication Services
|
2,436,117 | $700,529,804 | 2.43% | |
| JPM |
Jpmorgan Chase & Co
Financial Services
|
2,307,253 | $678,701,542 | 2.35% | |
| GEV |
GE Vernova Inc.
Industrials
|
664,603 | $580,131,958 | 2.01% | |
| V |
Visa Inc.
Financial Services
|
1,844,583 | $557,506,765 | 1.93% | |
| SPY |
Spdr S&P 500 ETF Trust
|
845,294 | $549,728,499 | 1.90% | |
| IDXX |
Idexx Laboratories Inc /De
Healthcare
|
946,336 | $531,736,735 | 1.84% |
Portfolio Trend
25 quarters · across all stocks
Holdings in ATMP
Shares Held
Position Value (USD)
6 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,000,883 | 29,087 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $733,260 | 25,487 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $762,825 | 26,487 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $776,598 | 26,487 | Shares | Sole | 2025-07-24 | |
| 2025-03-31 | $948,712 | 30,943 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $434,776 | 15,374 | Shares | Sole | 2025-02-12 | |
| No 13F history on record for this holder in this stock. | ||||||