BLAIR WILLIAM & CO/IL
Top Portfolio Positions
1,179 positions ·
$28,935,290,692 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 | 5.20% | |
| MSFT |
Microsoft Corp
Technology
|
3,498,110 | $1,294,895,378 | 4.48% | |
| AMZN |
Amazon Com Inc
Consumer Cyclical
|
6,057,938 | $1,261,686,747 | 4.36% | |
| NVDA |
Nvidia Corp
Technology
|
5,427,875 | $946,621,400 | 3.27% | |
| GOOGL |
Alphabet Inc.
Communication Services
|
2,436,117 | $700,529,804 | 2.42% | |
| JPM |
Jpmorgan Chase & Co
Financial Services
|
2,307,253 | $678,701,542 | 2.35% | |
| GEV |
GE Vernova Inc.
Industrials
|
664,603 | $580,131,958 | 2.00% | |
| 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 ONT
Shares Held
Position Value (USD)
22 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $5,844,192 | 266,980 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $8,463,777 | 340,869 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $9,033,680 | 328,976 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $7,664,367 | 350,131 | Shares | Sole | 2025-07-24 | |
| 2025-03-31 | $4,765,991 | 334,221 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $11,994,652 | 646,612 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $19,743,094 | 750,688 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $34,295,737 | 769,653 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $28,684,896 | 732,318 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $18,037,589 | 561,394 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $23,483,081 | 802,566 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $43,389,033 | 1,030,129 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $35,767,628 | 1,002,737 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $35,469,429 | 799,041 | Shares | Sole | 2023-02-10 | |
| 2022-09-30 | $25,325,259 | 752,608 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $23,130,225 | 685,137 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $39,380,872 | 744,018 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $38,665,427 | 548,368 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $18,595,594 | 301,192 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $14,664,580 | 273,287 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $9,913,177 | 197,513 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $5,389,300 | 174,073 | Shares | Sole | 2021-02-09 | |
| No 13F history on record for this holder in this stock. | ||||||