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 OPRX
Shares Held
Position Value (USD)
25 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $3,862,149 | 614,992 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $7,142,492 | 582,585 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $12,118,349 | 591,139 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $8,490,501 | 628,926 | Shares | Sole | 2025-07-24 | |
| 2025-03-31 | $5,464,728 | 631,031 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $2,922,721 | 601,383 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $5,227,165 | 677,094 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $6,437,570 | 643,757 | Shares | Sole | 2024-08-12 | |
| 2024-03-31 | $9,508,261 | 782,573 | Shares | Sole | 2024-05-09 | |
| 2023-12-31 | $10,605,198 | 741,104 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $6,507,954 | 836,498 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $12,086,710 | 845,816 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $12,339,117 | 843,412 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $13,705,524 | 815,805 | Shares | Sole | 2023-02-10 | |
| 2022-09-30 | $11,109,916 | 749,657 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $21,380,524 | 780,596 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $27,371,992 | 725,855 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $45,382,162 | 730,674 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $63,281,933 | 739,707 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $46,739,080 | 755,074 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $36,665,021 | 752,103 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $24,302,431 | 779,924 | Shares | Sole | 2021-02-09 | |
| 2020-09-30 | $15,953,335 | 765,148 | Shares | Sole | 2020-11-06 | |
| 2020-06-30 | $9,128,544 | 700,579 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $1,464,050 | 161,595 | Shares | Sole | 2020-05-11 | |
| No 13F history on record for this holder in this stock. | ||||||