Blair William & Co 13F holdings
Blair William & Co reported 1,316 positions with a total reported value of $38.4B as of 2026-06-30, in its 13F for Q2 2026, filed 2026-08-11. Top holdings by reported value: ISHARES TR (5.1%), GOOGL ALPHABET INC (5.0%), AAPL APPLE INC (4.3%), AMZN AMAZON COM INC (3.6%), MSFT MICROSOFT CORP (3.3%). Against 2026-03-31 it opened 141 new positions and exited 67. Next 13F due by 2026-11-14, the legal deadline 45 days after the quarter ending 2026-09-30.
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Top holdings
25 largest of 1,316 positions · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| ISHARES TR | 12,872,614 | $2.0B | 5.1% |
| GOOGL ALPHABET INC | 5,356,345 | $1.9B | 5.0% |
| AAPL APPLE INC | 5,731,525 | $1.7B | 4.3% |
| AMZN AMAZON COM INC | 5,875,124 | $1.4B | 3.6% |
| MSFT MICROSOFT CORP | 3,442,574 | $1.3B | 3.3% |
| NVDA NVIDIA CORPORATION | 5,374,424 | $1.1B | 2.8% |
| VANGUARD INDEX FDS | 4,869,207 | $1.1B | 2.8% |
| GEV GE VERNOVA INC | 659,673 | $775.0M | 2.0% |
| JPM JPMORGAN CHASE & CO | 2,270,360 | $743.2M | 1.9% |
| SPY STATE STR SPDR S&P 500 ETF T | 848,034 | $633.3M | 1.6% |
| V VISA INC | 1,841,604 | $631.8M | 1.6% |
| IVZ INVESCO ACTIVELY MANAGED EXC | 3,368,680 | $513.5M | 1.3% |
| COST COSTCO WHOLESALE CORPORATION | 524,692 | $490.8M | 1.3% |
| IDEXX LABS INC | 918,556 | $483.6M | 1.3% |
| VANGUARD INTL EQUITY INDEX F | 5,668,903 | $455.7M | 1.2% |
| APH AMPHENOL CORP | 2,504,409 | $441.6M | 1.2% |
| MA MASTERCARD INCORPORATED | 842,350 | $432.6M | 1.1% |
| PANW PALO ALTO NETWORKS INC | 1,226,519 | $418.3M | 1.1% |
| LLY ELI LILLY & CO | 347,098 | $416.3M | 1.1% |
| META META PLATFORMS INC | 670,881 | $377.9M | 1.0% |
| MU MICRON TECHNOLOGY INC | 315,878 | $364.6M | 0.9% |
| FAST FASTENAL CO | 7,407,059 | $355.8M | 0.9% |
| AVGO BROADCOM INC | 929,716 | $351.2M | 0.9% |
| ABBV ABBVIE INC | 1,287,857 | $324.1M | 0.8% |
| VANGUARD TAX-MANAGED FDS | 4,291,023 | $305.7M | 0.8% |
SEC FORM 13F · Q2 2026 · VALUES AS REPORTED, NOT PRICES
New positions this quarter
Held at 2026-06-30, not at 2026-03-31 · 141 in all · reported value as of 2026-06-30
| Holding | Shares | Reported value | % of portfolio |
|---|---|---|---|
| HONA HONEYWELL AEROSPACE INC | 454,071 | $100.4M | 0.3% |
| PTRN PATTERN GROUP INC | 703,580 | $17.7M | <0.1% |
| SPCX SPACE EXPLORATION TECHN CORP | 59,525 | $10.2M | <0.1% |
| CDNL CARDINAL INFRASTRUCTURE GROU | 98,193 | $9.2M | <0.1% |
| CBRS CEREBRAS SYSTEMS INC | 28,986 | $6.4M | <0.1% |
| ONTERRIS INC | 173,037 | $3.5M | <0.1% |
| HTFL HEARTFLOW INC | 102,482 | $3.0M | <0.1% |
| NBIS NEBIUS GROUP N.V. | 9,719 | $2.7M | <0.1% |
| FEDEX FGHT HLDG CO INC | 17,052 | $2.6M | <0.1% |
| INFQ INFLEQTION INC | 174,983 | $2.3M | <0.1% |
| AEHR AEHR TEST SYS | 17,838 | $1.7M | <0.1% |
| TLX TELIX PHARMACEUTICAL LTD | 122,985 | $1.4M | <0.1% |
| TARS TARSUS PHARMACEUTICALS INC | 22,053 | $1.4M | <0.1% |
| OCEANFIRST FINL CORP | 67,737 | $1.3M | <0.1% |
| LIFE ETHOS TECHNOLOGIES INC | 63,365 | $1.1M | <0.1% |
| HRZN HORIZON TECHNOLOGY FIN CORP | 239,073 | $1.1M | <0.1% |
| BKSY BLACKSKY TECHNOLOGY INC | 34,630 | $966.9K | <0.1% |
| AM ANTERO MIDSTREAM CORP | 37,159 | $845.4K | <0.1% |
| BLLN BILLIONTOONE INC | 6,978 | $837.2K | <0.1% |
| T ROWE PRICE EXCHANGE-TRADED | 16,692 | $819.0K | <0.1% |
| BAIN CAP SPECIALTY FIN INC | 64,468 | $807.1K | <0.1% |
| MID-AMER APT CMNTYS INC | 5,377 | $747.1K | <0.1% |
| MLKN MILLERKNOLL INC | 36,075 | $738.1K | <0.1% |
| MAIR MADISON AIR SOLUTIONS CORP | 16,365 | $638.2K | <0.1% |
| NNN NNN REIT INC | 13,704 | $637.6K | <0.1% |
Sold out
Held at 2026-03-31, gone by 2026-06-30 · 67 in all · reported value as of 2026-03-31
| Holding | Shares 2026-03-31 | Reported value | % of portfolio then |
|---|---|---|---|
| XOM EXXON MOBIL CORP | 946,386 | $160.6M | 0.5% |
| HURN HURON CONSULTING GROUP INC | 51,446 | $6.6M | <0.1% |
| PBH PRESTIGE CONSMR HEALTHCARE I | 106,485 | $6.3M | <0.1% |
| MONTROSE ENVIRONMENTAL GROUP | 266,980 | $5.8M | <0.1% |
| EXPO EXPONENT INC | 28,806 | $1.9M | <0.1% |
| CLEARWATER ANALYTICS HLDGS I | 77,582 | $1.8M | <0.1% |
| RLI RLI CORP | 31,573 | $1.8M | <0.1% |
| OSIS OSI SYSTEMS INC | 5,493 | $1.5M | <0.1% |
| FLUSHING FINL CORP | 78,721 | $1.2M | <0.1% |
| COTERRA ENERGY INC | 22,748 | $799.4K | <0.1% |
| ALHC ALIGNMENT HEALTHCARE INC | 42,450 | $748.0K | <0.1% |
| CCL CARNIVAL CORP | 21,718 | $562.1K | <0.1% |
| ALRM ALARM COM HLDGS INC | 12,066 | $521.1K | <0.1% |
| RYAAY RYANAIR HOLDINGS PLC | 8,686 | $502.1K | <0.1% |
| FCFS FIRSTCASH HOLDINGS INC | 2,589 | $486.7K | <0.1% |
| ELAN ELANCO ANIMAL HEALTH INC | 18,165 | $434.7K | <0.1% |
| TERNS PHARMACEUTICALS INC | 7,947 | $419.0K | <0.1% |
| GATX GATX CORP | 2,395 | $408.9K | <0.1% |
| T ROWE PRICE ETF INC | 8,972 | $400.6K | <0.1% |
| BL BLACKLINE INC | 10,573 | $391.2K | <0.1% |
| BNS BANK NOVA SCOTIA B C | 4,921 | $341.1K | <0.1% |
| PLXS PLEXUS CORP | 1,646 | $333.4K | <0.1% |
| OVV OVINTIV INC | 5,506 | $326.8K | <0.1% |
| SOCIEDAD QUIMICA Y MINERA DE | 4,006 | $324.2K | <0.1% |
| AROC ARCHROCK INC | 9,096 | $316.5K | <0.1% |
Biggest increases and decreases
Positions held at both quarter ends, by change in shares · reported value as of 2026-06-30
Increases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| VANGUARD INDEX FDS | 2,922,589 | 4,869,207 | +66.6% | $1.1B |
| ISHARES TR | 12,092,578 | 12,872,614 | +6.5% | $2.0B |
| KLAC KLA CORP | 32,080 | 288,392 | +799.0% | $87.0M |
| ANET ARISTA NETWORKS INC | 1,151,227 | 1,604,716 | +39.4% | $272.6M |
| IVZ INVESCO ACTIVELY MANAGED EXC | 2,956,947 | 3,368,680 | +13.9% | $513.5M |
| FIRST TR EXCHANGE TRADED FD | 2,364,514 | 3,226,513 | +36.5% | $193.7M |
| NOW SERVICENOW INC | 1,800,988 | 2,240,030 | +24.4% | $222.4M |
| MIAMI INTL HLDGS INC | 665,781 | 1,769,432 | +165.8% | $65.8M |
| SPDR SERIES TRUST | 1,712,526 | 2,228,570 | +30.1% | $166.2M |
| ASML ASML HLDG NV | 12,412 | 30,906 | +149.0% | $61.5M |
| VANGUARD INTL EQUITY INDEX F | 5,226,318 | 5,668,903 | +8.5% | $455.7M |
| HONEYWELL INTL INC | 295,831 | 454,384 | +53.6% | $101.7M |
Decreases
| Holding | Shares 2026-03-31 | Shares 2026-06-30 | Change | Reported value |
|---|---|---|---|---|
| DHR DANAHER CORP DEL | 1,296,804 | 971,095 | -25.1% | $185.0M |
| AAPL APPLE INC | 5,930,914 | 5,731,525 | -3.4% | $1.7B |
| MRVL MARVELL TECHNOLOGY INC | 723,976 | 530,549 | -26.7% | $158.0M |
| VEEV VEEVA SYS INC | 1,067,576 | 750,843 | -29.7% | $133.3M |
| CPRT COPART INC | 4,070,990 | 2,151,952 | -47.1% | $60.7M |
| SYK STRYKER CORPORATION | 847,701 | 684,392 | -19.3% | $215.5M |
| VRSK VERISK ANALYTICS INC | 380,106 | 103,394 | -72.8% | $18.6M |
| AMZN AMAZON COM INC | 6,057,938 | 5,875,124 | -3.0% | $1.4B |
| RYAN RYAN SPECIALTY HOLDINGS INC | 1,641,580 | 508,270 | -69.0% | $19.2M |
| MA MASTERCARD INCORPORATED | 923,405 | 842,350 | -8.8% | $432.6M |
| GOOGL ALPHABET INC | 5,471,882 | 5,356,345 | -2.1% | $1.9B |
| PGR PROGRESSIVE CORP | 1,219,749 | 1,034,104 | -15.2% | $225.9M |
CIK 902367 · 13F FILINGS ON EDGAR · INFORMATIONAL ONLY
More 13F data
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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