13F value (AUM)
$38.4B
BL
Blair William &
BLAIR WILLIAM & CO/IL
$38.4B
13F long value · 2026-Q2Positions1998
CategoryAsset Manager
Quarters tracked9
▲ #219 of 581 by 13F value
Size rank 7/10
3 NEW166 ADD80 2×+149 TRIM28 NEAR EXIT1 EXIT
Snapshot
Blair William &'s 13F portfolio at a glance — size, concentration and this quarter's activity.
Positions
1998 (99 unmapped)
Top 100 weight
71.8%
Quarters tracked
9
Latest 13F filed
Aug 11, 2026
New positions
3
Exits / near-exits
29
13F value by quarter
Total reported long value each quarter — fund flows plus market moves.
Top holdings — 2026-Q2
The fund's largest reported positions. The 100 shown cover 71.8% of the portfolio.
| Ticker | Issuer | Weight | Value | Shares | Since 2026-Q2 |
|---|---|---|---|---|---|
| AAPL | APPLE INC | 4.3% | $1.7B | 5.7M | +14.8% |
| AMZN | AMAZON COM INC | 3.6% | $1.4B | 5.9M | +6.2% |
| MSFT | MICROSOFT CORP | 3.3% | $1.3B | 3.4M | +39.8% |
| NVDA | NVIDIA CORPORATION | 2.8% | $1.1B | 5.4M | +18.1% |
| GOOG | ALPHABET INC | 2.7% | $1.0B | 3.0M | -1.4% |
| GOOGL | ALPHABET INC | 2.2% | $858.6M | 2.4M | -3.9% |
| GEV | GE VERNOVA INC | 2.0% | $775.0M | 659.7K | -4.6% |
| JPM | JPMORGAN CHASE & CO | 1.9% | $743.2M | 2.3M | +1.9% |
| SPY | STATE STR SPDR S&P 500 ETF T | 1.6% | $633.3M | 848.0K | +3.2% |
| V | VISA INC | 1.6% | $631.8M | 1.8M | +4.1% |
| COST | COSTCO WHOLESALE CORPORATION | 1.3% | $490.8M | 524.7K | -2.2% |
| IDXX | IDEXX LABS INC | 1.3% | $483.6M | 918.6K | +9.2% |
| APH | AMPHENOL CORP | 1.2% | $441.6M | 2.5M | -15.7% |
| MA | MASTERCARD INCORPORATED | 1.1% | $432.6M | 842.4K | +6.4% |
| RSP | INVESCO EXCHANGE TRADED FD T | 1.1% | $421.8M | 2.0M | — |
Quarterly changes — 2026-Q2
What Blair William & opened, added, trimmed and exited this quarter, largest dollar moves first.
| Action | Ticker | Issuer | Prev shares | Curr shares | Change | Value Δ |
|---|---|---|---|---|---|---|
| EXIT | XOM | EXXON MOBIL CORP | 946.4K | 0 | -100.0% | -$160.6M |
| ADD | ANET | ARISTA NETWORKS INC | 1.2M | 1.6M | +39.4% | +$131.3M |
| NEW | HONA | HONEYWELL AEROSPACE INC | — | 454.1K | — | +$100.4M |
| TRIM | MRVL | MARVELL TECHNOLOGY INC | 724.0K | 530.5K | -26.7% | +$86.3M |
| TRIM | NFLX | NETFLIX INC. | 1.8M | 1.3M | -27.1% | -$77.8M |
| ADD | VTI | VANGUARD INDEX FDS | 372.4K | 528.5K | +41.9% | +$76.1M |
| TRIM | CPRT | COPART INC | 4.1M | 2.2M | -47.1% | -$74.5M |
| TRIM | DHR | DANAHER CORP DEL | 1.3M | 971.1K | -25.1% | -$60.9M |
| TRIM | ROL | ROLLINS INC | 2.3M | 1.5M | -34.8% | -$59.3M |
| TRIM | GWRE | GUIDEWIRE SOFTWARE INC | 975.3K | 726.4K | -25.5% | -$56.5M |
Conviction over time
Portfolio weight of the current top long holdings, quarter by quarter — rising weight = growing conviction.