BLAIR WILLIAM & CO/IL
Registered adviserFiling Date
Global Rank
#227
/ 8,818
▼ 18
Top Industry
Semiconductors
8.2%
Period ended 4 months ago
Filed Aug 11, 2026 · 3mo
26 quarters · since Mar 2020
Regulatory profile
From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.
Holder type
Registered adviser
Form ADV roster, Oct 1, 2026
Records disagree; the first in precedence decides.
Regulatory AUM
$64,284,844,374
Main clients
Individuals and high net worth
(82% of AUM)
Private funds
21 funds
· Private equity funds
Focus by fund count, roster of Oct 1, 2026
$114,739,896 gross assets
LEI
549300J0P7XYE8BMZ775
Private funds on Schedule D 7.B.(1)
As filed May 14, 2024; SEC's bulk Form ADV archive ends with 2024 filings.
$111,183,703 gross assets in 19 funds
Private equity funds
$111,183,703
(19)
Form ADV history
Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.
| Rosters | Regulatory AUM | Main clients |
|---|---|---|
| Apr 2026 to Oct 2026 | $64,284,844,374 | Individuals and high net worth (82%) |
| Apr 2025 to Mar 2026 | $58,329,726,421 | Individuals and high net worth (83%) |
| Apr 2024 to Mar 2025 | $49,981,350,919 | Individuals and high net worth (82%) |
| May 2023 to Mar 2024 | $41,721,600,830 | Individuals and high net worth (82%) |
| Apr 2023 | $41,721,600,830 | Individuals and high net worth (82%) |
| Apr 2022 to Mar 2023 | $49,965,190,648 | Individuals and high net worth (83%) |
4 earlier changes not shown.
Portfolio style
Measured from the filed 13F common-share book for Jun 30, 2026, never from the firm's own description.
Style
Diversified active
Top 10 weight 32.5%, 65.4 effective positions, active share 42.0% against every 13F filer's combined book; it meets none of the index-like, systematic-like or concentrated tests
Turnover
Low turnover
16.6% over the last four quarters (under 30%)
Horizon
Long horizon
Value-weighted holding period 24.4 quarters (12+), a floor since 88.0% of the book was already held when coverage starts
Closest benchmark: every 13F filer's combined book, active share 42.0%; sector active share 11.2% against the combined 13F book's sector weights.
Over time 26 measured quarters
How the bands are measured
Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.
Clone Performance
Build a hypothetical price-return history from this filer's public 13F holdings.
View clone backtestPortfolio Concentration
1,966 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026Top Position
5.1%
+0.2 pts
Top 5
21.4%
+0.3 pts
Top 10
32.5%
+1.0 pts
HHI
153
Diversified+6
Portfolio Trend
26 quarters · across all stocks
Sector Breakdown
As of Jun 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Technology | 24.4% | $9,347,846,867 |
| Unclassified | 18.5% | $7,090,828,725 |
| Industrials | 15.2% | $5,848,912,408 |
| Financial Services | 11.2% | $4,305,924,359 |
| Healthcare | 9.1% | $3,497,712,558 |
| Communication Services | 7.0% | $2,679,093,412 |
| Consumer Cyclical | 6.7% | $2,584,550,748 |
| Consumer Defensive | 3.5% | $1,342,912,123 |
| Basic Materials | 1.6% | $612,831,185 |
| Energy | 1.4% | $530,920,219 |
| Real Estate | 0.9% | $353,549,901 |
| Utilities | 0.4% | $161,913,603 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased
25 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| VUG | VANGUARD GROWTH INDEX FUND | +1,276,220 | 1,526,650 | $131,505,631 | |
| MIAX | Miami International Holdings, Inc. | +1,103,651 | 1,769,432 | $65,752,093 | |
| IWF | iShares Russell 1000 Growth ETF | +707,575 | 973,601 | $120,892,036 | |
| RDVY | First Trust Rising Dividend Achievers ETF | +550,198 | 1,431,021 | $115,998,562 | |
| SPMD | State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF | +455,777 | 1,294,582 | $87,461,959 | |
| ANET | Arista Networks, Inc. | +453,489 | 1,604,716 | $272,609,154 | |
| NOW | ServiceNow, Inc. | +439,042 | 2,240,030 | $222,390,177 | |
| VEA | Vanguard FTSE Developed Markets ETF | +428,937 | 4,291,023 | $305,735,388 | |
| VO | VANGUARD MID-CAP INDEX FUND | +417,925 | 555,266 | $44,737,781 | |
| SDVY | First Trust SMID Cap Rising Dividend Achievers ETF | +311,654 | 1,792,212 | $77,316,025 | |
| VEU | Vanguard International Equity Index Funds | +310,593 | 4,479,218 | $375,134,507 | |
| TTAN | ServiceTitan, Inc. | +306,036 | 363,384 | $25,694,882 | |
| RSP | Victory Portfolios II | +301,788 | 1,982,392 | $421,793,545 | |
| PPLT | abrdn Platinum ETF Trust | +260,664 | 304,766 | $4,306,343 | |
| KLAC | Kla Corp | +256,312 | 288,392 | $87,010,750 | |
| PRCT | PROCEPT BioRobotics Corp | +207,789 | 531,724 | $12,006,327 | |
| TWST | Twist Bioscience Corp | +199,139 | 256,556 | $26,394,481 | |
| BAC | Bank Of America Corp | +162,566 | 1,204,669 | $68,642,039 | |
| HON | Honeywell International Inc | +158,553 | 454,384 | $101,736,577 | |
| VTI | VANGUARD TOTAL STOCK MARKET INDEX FUND | +156,154 | 528,525 | $195,575,391 | |
| TWLO | Twilio Inc | +147,735 | 376,430 | $77,668,801 | |
| — | +146,675 | 184,444 | $5,055,610 | ||
| ZM | Zoom Communications, Inc. | +143,460 | 256,974 | $22,179,425 | |
| CVNA | Carvana Co. | +139,856 | 175,096 | $11,524,818 | |
| NTLA | Intellia Therapeutics, Inc. | +134,402 | 152,612 | $2,582,195 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced
25 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| CPRT | Copart Inc | −1,919,038 | 2,151,952 | $60,663,526 | |
| RYAN | Ryan Specialty Holdings, Inc. | −1,133,310 | 508,270 | $19,192,275 | |
| ROL | Rollins Inc | −788,286 | 1,476,727 | $61,638,584 | |
| MDLN | Medline Inc. | −607,519 | 557,911 | $22,004,009 | |
| UBER | Uber Technologies, Inc | −505,006 | 2,794,590 | $201,657,614 | |
| GDYN | Grid Dynamics Holdings, Inc. | −485,795 | 13,560 | $77,020 | |
| NFLX | Netflix Inc | −477,970 | 1,285,481 | $91,783,343 | |
| TECH | BIO-TECHNE Corp | −350,756 | 513,573 | $36,283,932 | |
| DHR | Danaher Corp | −325,709 | 971,095 | $184,974,175 | |
| VEEV | Veeva Systems Inc | −316,733 | 750,843 | $133,252,107 | |
| ICE | Intercontinental Exchange, Inc. | −309,874 | 1,283,754 | $158,042,954 | |
| NDAQ | Nasdaq, Inc. | −280,595 | 745,415 | $58,753,610 | |
| VRSK | Verisk Analytics, Inc. | −276,712 | 103,394 | $18,562,324 | |
| ABT | Abbott Laboratories | −264,550 | 1,063,211 | $96,475,766 | |
| DXCM | Dexcom Inc | −261,722 | 1,665,665 | $112,182,537 | |
| GWRE | Guidewire Software, Inc. | −248,909 | 726,387 | $89,381,920 | |
| NKE | NIKE, Inc. | −247,294 | 141,433 | $5,805,824 | |
| CSGP | Costar Group, Inc. | −242,154 | 658,159 | $18,639,062 | |
| ZTS | Zoetis Inc. | −211,428 | 583,869 | $41,956,826 | |
| AAPL | Apple Inc. | −199,389 | 5,731,525 | $1,658,474,073 | |
| MRVL | Marvell Technology, Inc. | −193,427 | 530,549 | $158,045,241 | |
| PGR | Progressive Corp | −185,645 | 1,034,104 | $225,900,018 | |
| AMZN | Amazon Com Inc | −182,814 | 5,875,124 | $1,400,277,053 | |
| HOOD | Robinhood Markets, Inc. | −167,721 | 6,904 | $692,333 | |
| BX | Blackstone Inc. | −167,607 | 1,011,005 | $118,964,958 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter
25 positions
| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| HONA | Honeywell Aerospace Inc. | 454,071 | $100,386,016 | |
| PTRN | Pattern Group Inc. | 703,580 | $17,723,180 | |
| SPCX | Space Exploration Technologies Corp | 59,525 | $10,170,441 | |
| CDNL | Cardinal Infrastructure Group Inc. | 98,193 | $9,249,780 | |
| CBRS | Cerebras Systems Inc. | 28,986 | $6,405,906 | |
| HTFL | Heartflow, Inc. | 102,482 | $3,006,821 | |
| NBIS | Nebius Group N.V. | 9,719 | $2,684,096 | |
| FDXF | FedEx Freight Holding Company, Inc. | 17,052 | $2,574,852 | |
| INFQ | Infleqtion, Inc. | 174,983 | $2,330,773 | |
| AEHR | Aehr Test Systems | 17,838 | $1,713,518 | |
| TLX | Telix Pharmaceuticals Ltd | 122,985 | $1,418,017 | |
| TARS | Tarsus Pharmaceuticals, Inc. | 22,053 | $1,388,015 | |
| OCFC | Oceanfirst Financial Corp | 67,737 | $1,322,903 | |
| LIFE | Ethos Technologies Inc. | 63,365 | $1,149,441 | |
| HRZN | Horizon Technology Finance Corp | 239,073 | $1,130,815 | |
| BKSY | BlackSky Technology Inc. | 34,630 | $966,869 | |
| AM | Antero Midstream Corp | 37,159 | $845,367 | |
| BLLN | BillionToOne, Inc. | 6,978 | $837,220 | |
| AAEQ | Alpha Architect US Equity 2 ETF | 15,195 | $808,176 | |
| BCSF | Bain Capital Specialty Finance, Inc. | 64,468 | $807,139 | |
| MAA | Mid America Apartment Communities Inc. | 5,377 | $747,080 | |
| MLKN | Millerknoll, Inc. | 36,075 | $738,094 | |
| MAIR | Madison Air Solutions Corp | 16,365 | $638,235 | |
| NNN | Nnn REIT, Inc. | 13,704 | $637,647 | |
| CNQ | CANADIAN NATURAL RESOURCES Ltd | 15,842 | $625,759 | |
| No positions match the current search. | ||||
Sold Out
Positions the filer fully exited
25 positions
| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| XOM | ExxonMobil Holdings Corp | 946,386 | $160,563,848 | |
| HURN | Huron Consulting Group Inc. | 51,446 | $6,558,850 | |
| PBH | Prestige Consumer Healthcare Inc. | 106,485 | $6,311,365 | |
| EXPO | Exponent Inc | 28,806 | $1,879,591 | |
| — | 77,582 | $1,834,814 | ||
| RLI | Rli Corp | 31,573 | $1,800,923 | |
| EIS | iShares MSCI Israel ETF | 15,076 | $1,749,419 | |
| OSIS | Osi Systems Inc | 5,493 | $1,458,446 | |
| — | 78,721 | $1,209,155 | ||
| — | 22,748 | $799,366 | ||
| ALHC | Alignment Healthcare, Inc. | 42,450 | $747,969 | |
| CCL | Carnival Corp Ltd. | 21,718 | $562,061 | |
| ALRM | Alarm.com Holdings, Inc. | 12,066 | $521,130 | |
| RYAAY | Ryanair Holdings PLC | 8,686 | $502,050 | |
| FCFS | FirstCash Holdings, Inc. | 2,589 | $486,732 | |
| ELAN | Elanco Animal Health Inc | 18,165 | $434,688 | |
| — | 7,947 | $418,966 | ||
| GATX | Gatx Corp | 2,395 | $408,922 | |
| BL | Blackline, Inc. | 10,573 | $391,201 | |
| BNS | Bank Of Nova Scotia | 4,921 | $341,074 | |
| PLXS | Plexus Corp | 1,646 | $333,380 | |
| OVV | Ovintiv Inc. | 5,506 | $326,836 | |
| SQM | Chemical & Mining Co Of Chile Inc | 4,006 | $324,245 | |
| AROC | Archrock, Inc. | 9,096 | $316,540 | |
| SSB | SouthState Bank Corp | 3,412 | $315,678 | |
| No positions match the current search. | ||||
1,966 tracked positions ·
$38,356,996,108 total
· filing declares
2,054 positions · $38,388,159,607
· as of Jun 30, 2026
All sectors
Basic Materials
Communication Services
Consumer Cyclical
Consumer Defensive
Energy
Financial Services
Healthcare
Industrials
Real Estate
Technology
Utilities
Showing 1–50
of 1,966 positions by value
· page 1 of 40
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| AAPL |
Apple Inc.
Technology
|
Reduced | 5,731,525 | $1,658,474,073 | 4.32% | |
| AMZN |
Amazon Com Inc
Consumer Cyclical
|
Reduced | 5,875,124 | $1,400,277,053 | 3.65% | |
| MSFT |
Microsoft Corp
Technology
|
Reduced | 3,442,574 | $1,284,148,952 | 3.35% | |
| NVDA |
Nvidia Corp
Technology
|
Reduced | 5,374,424 | $1,075,368,497 | 2.80% | |
| GOOG |
Alphabet Inc.
Communication Services
|
Reduced | 2,953,724 | $1,043,639,300 | 2.72% | |
| GOOGL |
Alphabet Inc.
Communication Services
|
Reduced | 2,402,621 | $858,624,666 | 2.24% | |
| GEV |
GE Vernova Inc.
Industrials
|
Reduced | 659,673 | $775,023,420 | 2.02% | |
| JPM |
Jpmorgan Chase & Co
Financial Services
|
Reduced | 2,270,360 | $743,156,938 | 1.94% | |
| SPY |
Spdr S&P 500 ETF Trust
|
Added | 848,034 | $633,286,350 | 1.65% | |
| V |
Visa Inc.
Financial Services
|
Reduced | 1,841,604 | $631,835,916 | 1.65% | |
| COST |
Costco Wholesale Corp
Consumer Defensive
|
Added | 524,692 | $490,833,624 | 1.28% | |
| IDXX |
Idexx Laboratories Inc
Healthcare
|
Reduced | 918,556 | $483,564,619 | 1.26% | |
| APH |
Amphenol Corp
Technology
|
Reduced | 2,504,409 | $441,577,394 | 1.15% | |
| MA |
Mastercard Inc
Financial Services
|
Reduced | 842,350 | $432,630,959 | 1.13% | |
| RSP |
Victory Portfolios II
|
Added | 1,982,392 | $421,793,545 | 1.10% | |
| PANW |
Palo Alto Networks Inc
Technology
|
Reduced | 1,226,519 | $418,267,509 | 1.09% | |
| LLY |
ELI LILLY & Co
Healthcare
|
Added | 347,098 | $416,319,788 | 1.09% | |
| META |
Meta Platforms, Inc.
Communication Services
|
Reduced | 670,881 | $377,900,558 | 0.99% | |
| VEU |
Vanguard International Equity Index Funds
|
Added | 4,479,218 | $375,134,507 | 0.98% | |
| MU |
Micron Technology Inc
Technology
|
Reduced | 315,878 | $364,614,816 | 0.95% | |
| IVV |
iShares Core S&P 500 ETF
|
Reduced | 484,704 | $362,989,978 | 0.95% | |
| FAST |
Fastenal Co
Industrials
|
Added | 7,407,059 | $355,761,043 | 0.93% | |
| AVGO |
Broadcom Inc.
Technology
|
Added | 929,716 | $351,200,219 | 0.92% | |
| ABBV |
AbbVie Inc.
Healthcare
|
Reduced | 1,287,857 | $324,076,335 | 0.84% | |
| VEA |
Vanguard FTSE Developed Markets ETF
|
Added | 4,291,023 | $305,735,388 | 0.80% | |
| BWXT |
BWX Technologies, Inc.
Industrials
|
Added | 1,556,417 | $302,956,569 | 0.79% | |
| VOO |
VANGUARD 500 INDEX FUND
|
Added | 419,372 | $288,028,883 | 0.75% | |
| ANET |
Arista Networks, Inc.
Technology
|
Added | 1,604,716 | $272,609,154 | 0.71% | |
| VTV |
VANGUARD VALUE INDEX FUND
|
Added | 1,232,497 | $268,598,071 | 0.70% | |
| QQQ |
Invesco Qqq Trust, Series 1
|
Added | 359,219 | $264,528,871 | 0.69% | |
| WMT |
Walmart Inc.
Consumer Defensive
|
Reduced | 2,270,879 | $257,199,755 | 0.67% | |
| HD |
Home Depot, Inc.
Consumer Cyclical
|
Reduced | 697,590 | $246,026,041 | 0.64% | |
| JNJ |
Johnson & Johnson
Healthcare
|
Added | 956,262 | $242,861,860 | 0.63% | |
| BRK-B |
Berkshire Hathaway Inc
Financial Services
|
Reduced | 483,586 | $241,981,598 | 0.63% | |
| P |
Everpure, Inc.
Technology
|
Added | 3,048,094 | $240,159,326 | 0.63% | |
| ECL |
Ecolab Inc.
Basic Materials
|
Reduced | 854,294 | $238,014,851 | 0.62% | |
| WSO |
Watsco Inc
Industrials
|
Reduced | 564,024 | $235,045,721 | 0.61% | |
| AXP |
American Express Co
Financial Services
|
Reduced | 680,321 | $230,118,578 | 0.60% | |
| PGR |
Progressive Corp
Financial Services
|
Reduced | 1,034,104 | $225,900,018 | 0.59% | |
| NOW |
ServiceNow, Inc.
Technology
|
Added | 2,240,030 | $222,390,177 | 0.58% | |
| TDG |
TransDigm Group INC
Industrials
|
Reduced | 164,960 | $219,733,318 | 0.57% | |
| SYK |
Stryker Corp
Healthcare
|
Reduced | 684,392 | $215,473,977 | 0.56% | |
| IWM |
iShares Russell 2000 ETF
|
Added | 701,051 | $210,630,772 | 0.55% | |
| CRWD |
CrowdStrike Holdings, Inc.
Technology
|
Added | 272,235 | $207,753,417 | 0.54% | |
| UBER |
Uber Technologies, Inc
Technology
|
Reduced | 2,794,590 | $201,657,614 | 0.53% | |
| VTI |
VANGUARD TOTAL STOCK MARKET INDEX FUND
|
Added | 528,525 | $195,575,391 | 0.51% | |
| AAON |
Aaon, Inc.
Industrials
|
Reduced | 1,533,434 | $194,531,437 | 0.51% | |
| BA |
Boeing Co
Industrials
|
Reduced | 878,396 | $190,146,382 | 0.50% | |
| DHR |
Danaher Corp
Healthcare
|
Reduced | 971,095 | $184,974,175 | 0.48% | |
| CTAS |
Cintas Corp
Industrials
|
Added | 1,063,530 | $180,885,182 | 0.47% |
Showing the top 50 of 1,966 positions. Create a free account to see every position, past quarters, search, filters and CSV export.
Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.