BLAIR WILLIAM & CO/IL
Institutional investor · Portfolio as of Q2 2026
Top Holdings1,998 positions
Stock | Shares | Value | Weight | Avg Buy | Est. P&L | Held | Conviction |
|---|---|---|---|---|---|---|---|
APPLE INC | 5.7M | $1.7B | 4.3% | $103.22 | +209.74% | 31 qtrssince 2018-Q4 | Decreased 0 |
AMAZON COM INC | 5.9M | $1.4B | 3.6% | $114.59 | +132.51% | 31 qtrssince 2018-Q4 | Decreased 0 |
MICROSOFT CORP | 3.4M | $1.3B | 3.3% | $123.78 | +314.87% | 31 qtrssince 2018-Q4 | Decreased 0 |
NVIDIA CORPORATION | 5.4M | $1.1B | 2.8% | $118.12 | +84.18% | 31 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC | 3M | $1B | 2.7% | $95.36 | +259.57% | 31 qtrssince 2018-Q4 | Decreased 0 |
ALPHABET INC | 2.4M | $858.6M | 2.2% | $101.51 | +241.44% | 31 qtrssince 2018-Q4 | Decreased 0 |
GE VERNOVA INC | 659,673 | $775M | 2.0% | $407.51 | +123.78% | 9 qtrssince 2024-Q2 | Decreased 0 |
JPMORGAN CHASE & CO | 2.3M | $743.2M | 1.9% | $105.79 | +238.04% | 31 qtrssince 2018-Q4 | Decreased 0 |
STATE STR SPDR S&P 500 ETF T | 848,034 | $633.3M | 1.6% | $326.62 | +135.55% | 31 qtrssince 2018-Q4 | Increased 50 |
VISA INC | 1.8M | $631.8M | 1.6% | $133.30 | +186.27% | 31 qtrssince 2018-Q4 | Decreased 0 |
COSTCO WHOLESALE CORPORATION | 524,692 | $490.8M | 1.3% | $317.72 | +197.58% | 31 qtrssince 2018-Q4 | Increased 50 |
IDEXX LABS INC | 918,556 | $483.6M | 1.3% | $189.63 | +192.66% | 31 qtrssince 2018-Q4 | Decreased 0 |
AMPHENOL CORP | 2.5M | $441.6M | 1.2% | $46.39 | +240.00% | 31 qtrssince 2018-Q4 | Decreased 0 |
MASTERCARD INCORPORATED | 842,350 | $432.6M | 1.1% | $200.68 | +196.64% | 31 qtrssince 2018-Q4 | Decreased 0 |
INVESCO EXCHANGE TRADED FD T | 2M | $421.8M | 1.1% | $192.55 | +14.62% | 31 qtrssince 2018-Q4 | Increased 58 |
PALO ALTO NETWORKS INC | 1.2M | $418.3M | 1.1% | $139.19 | +166.97% | 31 qtrssince 2018-Q4 | Decreased 0 |
ELI LILLY & CO | 347,098 | $416.3M | 1.1% | $326.78 | +259.45% | 31 qtrssince 2018-Q4 | Increased 53 |
META PLATFORMS INC | 670,881 | $377.9M | 1.0% | $457.25 | +26.41% | 31 qtrssince 2018-Q4 | Decreased 0 |
VANGUARD INTL EQUITY INDEX F | 4.5M | $375.1M | 1.0% | $62.90 | +35.82% | 31 qtrssince 2018-Q4 | Increased 47 |
MICRON TECHNOLOGY INC | 315,878 | $364.6M | 0.9% | $81.19 | +1048.99% | 31 qtrssince 2018-Q4 | Decreased 0 |
BLAIR WILLIAM & CO/IL manages $38.4B across 1998 positions as of Q2 2026. Top holdings: AAPL (4.3%), AMZN (3.6%), MSFT (3.3%). Fund DNA: Balanced Allocator. HoldingsIntel Score: 4.5/5.0.
Active quarter - 167 new positions, 91 exits, 900 increased. Top move: RSP (INCREASED, conviction 58). Portfolio: $38.4B across 1998 positions.
Top holdings by portfolio weight
Portfolio allocation by GICS sector
Behavioral investing profile
Position Outcomes
Best and worst performing positions by estimated return
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Cost basis estimates based on full filing history using quarter-end prices. Actual transaction prices are not disclosed in 13F filings.
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Data sourced from SEC EDGAR 13F filings. Not financial advice. Full disclaimer
Verify source filings on SEC EDGAR