Blair William & Co.

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 12, 2025), Blair William & Co. reported 1,828 stock positions worth $37.6 billion. Its top holding was Microsoft (MSFT) at 5.0% of the portfolio, followed by Apple (AAPL, 4.1%) and Amazon.com (AMZN, 3.5%). Compared with Q2 2025, it opened 99 new positions, sold out of 75, added to 694 and reduced 773. The biggest buy was AppLovin Class A (APP, shares +107%) and the biggest sale Fiserv (FISV, shares −8%).

Most Recent 13F
Q2 2026
Location
CHICAGO, IL
CIK
0000902367
Portfolio Value
$37.6B (Q3 2025)
SEC Filing
0001104659-25-109927 ↗ filed Nov 12, 2025

Holdings Value

0$10.0B$20.0B$30.0B$40.0B Q1 2024: $31.8B Q1 2024 Q2 2024: $32.4B Q2 2024 Q3 2024: $34.0B Q3 2024 Q4 2024: $34.4B Q4 2024 Q1 2025: $33.2B Q1 2025 Q2 2025: $36.0B Q2 2025 Q3 2025: $37.6B $37.6B Q3 2025 Q4 2025: $37.3B Q4 2025 Q1 2026: $34.9B Q1 2026 Q2 2026: $38.4B Q2 2026

Holdings 1,828 stocks · $37.6B

MSFT Microsoft Corp. 4.97% 3,607,106 $1.9B Reduce -2.4%
AAPL Apple Inc. 4.06% 5,992,795 $1.5B Reduce -0.6%
AMZN Amazon.com Inc. 3.51% 6,006,885 $1.3B Reduce -1.9%
NVDA Nvidia Corp. 2.80% 5,645,112 $1.1B Add +0.8%
GOOG Alphabet Inc. Class C 2.04% 3,145,955 $766.2M Reduce -1.1%
JPM JPMorgan Chase & Co. 1.94% 2,306,918 $727.7M Reduce -1.0%
V Visa Inc. Class A 1.78% 1,962,153 $669.8M Reduce -5.3%
IDXX Idexx Laboratories Inc. 1.75% 1,031,786 $659.2M Reduce -4.5%
GOOGL Alphabet Inc. Class A 1.63% 2,525,974 $614.1M Add +0.0%
SPY SS SPDR S&P 500 ETF Trust-US 1.52% 859,344 $572.5M Reduce -0.0%
MA Mastercard Inc. Class A 1.48% 976,597 $555.5M Reduce -3.0%
COST Costco Wholesale Corp. 1.36% 551,558 $510.5M Reduce -0.1%
META Meta Platforms Inc. Class A 1.33% 678,857 $498.5M Add +17.7%
UBER Uber Technologies Inc. 1.11% 4,247,493 $416.1M Reduce -1.8%
GEV GE Vernova Inc. 1.03% 628,121 $386.2M Reduce -0.7%
VEEV Veeva Systems Inc. Class A 1.02% 1,289,252 $384.1M Add +0.3%
NOW ServiceNow Inc. 0.98% 399,081 $367.3M Add +21.8%
PGR Progressive Corp. 0.95% 1,439,156 $355.4M Reduce -4.4%
FAST Fastenal Co. 0.91% 6,965,564 $341.6M Add +2.1%
APH Amphenol Corp. Class A 0.91% 2,751,514 $340.5M Reduce -7.4%
SYK Stryker Corp. 0.90% 919,505 $339.9M Reduce -0.5%
WSO Watsco Inc. 0.86% 799,956 $323.4M Reduce -0.8%
HD Home Depot Inc. 0.83% 765,895 $310.3M Add +0.9%
IVV iShares Core S&P 500 ETF 0.80% 446,312 $298.7M Add +2.3%
AVGO Broadcom Inc. 0.78% 889,716 $293.5M Reduce -4.8%
ABBV Abbvie Inc. 0.78% 1,263,581 $292.6M Add +0.5%
ICE Intercontinental Exchange Inc. 0.78% 1,729,769 $291.4M Reduce -1.3%
DHR Danaher Corp. 0.72% 1,366,102 $270.8M Reduce -0.7%
GWRE Guidewire Software Inc. 0.71% 1,158,043 $266.2M Reduce -1.4%
CSGP Costar Group Inc. 0.70% 3,128,473 $263.9M Add +9.0%
P Everpure Inc. Class A filed as PURE STORAGE INC 0.69% 3,085,052 $258.6M Reduce -1.3%
PANW Palo Alto Networks Inc. 0.67% 1,237,864 $252.1M Add +6.9%
FISV Fiserv Inc. 0.66% 1,935,022 $249.5M Reduce -8.2%
WMT Walmart Inc. 0.66% 2,406,279 $248.0M Reduce -1.2%
AXP American Express Co. 0.62% 703,490 $233.7M Add +3.7%
BX Blackstone Inc. 0.62% 1,361,649 $232.6M Add +0.4%
LLY Eli Lilly & Co. 0.61% 299,549 $228.6M Reduce -1.6%
TDG Transdigm Group Inc. 0.61% 172,649 $227.6M Reduce -0.2%
APP AppLovin Corp. Class A 0.61% 316,388 $227.3M Add +106.5%
BRK.B Berkshire Hathaway Inc. Class B 0.60% 445,234 $223.8M Add +0.6%
TYL Tyler Technologies Inc. 0.59% 424,708 $222.2M Reduce -0.0%
BWXT BWX Technologies Inc. 0.58% 1,191,068 $219.6M Add +18.7%
ECL Ecolab Inc. 0.58% 794,143 $217.5M Reduce -1.4%
ABT Abbott Laboratories 0.57% 1,598,206 $214.1M Reduce -0.3%
CPRT Copart Inc. 0.57% 4,738,566 $213.1M Reduce -6.8%
WDAY Workday Inc. Class A 0.57% 882,933 $212.5M Reduce -17.3%
CTAS Cintas Corp. 0.55% 1,005,955 $206.5M Reduce -0.8%
ISRG Intuitive Surgical Inc. 0.55% 458,006 $204.8M Reduce -1.7%
VOO Vanguard S&P 500 ETF 0.54% 330,019 $202.1M Add +8.6%
ZTS Zoetis Inc. 0.53% 1,363,155 $199.5M Reduce -16.5%
AON Aon PLC Class A 0.50% 529,773 $188.9M Reduce -6.7%
VEA Vanguard Ftse Developed ETF 0.49% 3,044,272 $182.4M Add +3.0%
NFLX Netflix Inc. 0.48% 149,232 $178.9M Reduce -0.7%
JNJ Johnson & Johnson 0.47% 948,277 $175.8M Reduce -0.5%
INTU Intuit Inc. 0.46% 250,286 $170.9M Reduce -2.0%
AAON Aaon Inc. 0.45% 1,819,292 $170.0M Reduce -20.2%
ANET Arista Networks Inc. 0.43% 1,112,568 $162.1M Reduce -3.9%
VEU Vanguard Ftse All-World Ex-U 0.43% 2,266,265 $161.7M Add +10.3%
QQQ Invesco QQQ Trust Series 1 0.42% 265,585 $159.4M Reduce -1.8%
AMT American Tower Corp. 0.40% 782,048 $150.4M Add +1.1%
VTV Vanguard Mrngstr Val ETF-Aui 0.40% 804,306 $150.0M Reduce -2.4%
RYAN Ryan Specialty Holdings Inc. 0.40% 2,660,791 $150.0M Reduce -5.5%
CRM Salesforce Inc. 0.39% 614,695 $145.7M Reduce -6.2%
VIG Vanguard Dividend Apprec ETF 0.38% 666,611 $143.8M Add +4.9%
ORCL Oracle Corp. 0.38% 510,419 $143.6M Reduce -1.7%
BA The Boeing Co. 0.38% 665,006 $143.5M Add +1.1%
PG The Procter & Gamble Co. 0.38% 928,397 $142.6M Reduce -5.3%
DXCM Dexcom Inc. 0.38% 2,109,343 $141.9M Reduce -4.5%
ADBE Adobe Inc. 0.37% 393,313 $138.7M Reduce -30.4%
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.35% 459,740 $129.7M Reduce -3.3%
CWAN Clearwater Analytics HDS-A 0.34% 7,134,647 $128.6M Add +83.5%
IRTC Irhythm Holdings Inc. 0.34% 740,721 $127.4M Add +0.2%
ROL Rollins Inc. 0.33% 2,124,489 $124.8M Reduce -2.1%
GS Goldman Sachs Group Inc. 0.32% 153,206 $122.0M Add +2.1%
IWM iShares Russell 2000 ETF 0.32% 500,461 $121.1M Add +1.4%
TSLA Tesla Inc. 0.32% 268,015 $119.2M Reduce -5.5%
IWF iShares Russell 1000 Growth 0.31% 250,798 $117.5M Add +0.7%
ORLY O'reilly Automotive Inc. 0.31% 1,085,453 $117.0M Add +0.5%
UNP Union Pacific Corp. 0.30% 484,001 $114.4M Reduce -2.8%
LYV Live Nation Entertainment Inc. 0.30% 698,032 $114.1M Reduce -0.6%
LIN Linde PLC 0.30% 238,849 $113.5M Reduce -0.5%
CRWD CrowdStrike Holdings Inc. Class A 0.29% 225,394 $110.5M Add +28.9%
ACN Accenture PLC Class A 0.29% 447,619 $110.4M Reduce -23.8%
XOM Exxon Mobil Corp. 0.29% 963,274 $108.6M Reduce -0.8%
ITW Illinois Tool Works 0.29% 412,195 $107.5M Reduce -2.2%
WM Waste Management Inc. 0.28% 484,597 $107.0M Add +20.0%
MCD McDonald's Corp. 0.28% 343,959 $104.5M Add +0.5%
SPGI S&P Global Inc. 0.28% 214,509 $104.4M Add +4.1%
IUSV iShares Core S&P U.S. Value 0.28% 1,042,342 $104.2M Reduce -0.7%
CVX Chevron Corp. 0.28% 668,728 $103.8M Add +2.4%
KO The Coca-Cola Co. 0.27% 1,521,663 $100.9M Reduce -1.8%
VRSK Verisk Analytics Inc. 0.27% 396,691 $99.8M Add +3.5%
AME Ametek Inc. 0.26% 529,273 $99.5M Reduce -23.3%
ROK Rockwell Automation Inc. 0.26% 279,199 $97.6M Add +0.8%
VUG Vanguard Mrngstar GR ETF-Sui 0.26% 202,226 $97.0M Add +6.8%
GD General Dynamics Corp. 0.26% 284,145 $96.9M Add +1.6%
QCOM Qualcomm Inc. 0.26% 579,279 $96.4M Add +32.2%
VTI VG Morningstar TS MKT ETF-US 0.25% 291,473 $95.7M Add +7.8%
MDB Mongodb Inc. 0.25% 300,010 $93.1M Reduce -16.9%
PCOR Procore Technologies Inc. 0.24% 1,225,529 $89.4M Add +11.2%

Show all 1,828 holdings

Other holdings (16): bonds, preferreds, convertibles and warrants · $3.8M (not counted above)
SecurityClassShares / PrincipalValueChange
CORZW Core Scientific Inc. - 27 *W EXP 01/23/202 114,509$1.3MNo change
WELLS FARGO & COMPANY (WFC 7.5 PERP L) PERP PFD CNV A 785$969KReduce -1.9%
TELADOC HEALTH INC (TDOC 1.25 06/01/27) NOTE 1.250% 6/0 · principal 525,000$490KNo change
EVOLENT HEALTH INC (EVH 1.5 10/15/25) NOTE 1.500%10/1 · principal 365,000$362KNo change
BANK OF AMERICA CORP (BAC 7.25 PERP L) 7.25%CNV PFD L 268$343KNo change
PELOTON INTERACTIVE INC (PTON 0 02/15/26) NOTE 2/1 · principal 100,000$98KNo change
HOLLEY INC *W EXP 11/30/202 401,489$44KNo change
BOEING CO/THE (BA 6 10/15/27) DEP CONV PFD A 562$39KNo change
DISH NETWORK CORP (DISH 3.375 08/15/26) NOTE 3.375% 8/1 · principal 25,000$24KNo change
HTZWW Hertz Global Hldgs Inc. -CW51 *W EXP 06/30/205 5,602$21KNo change
OXY.WS Occidental Petroleum-CW27 *W EXP 08/03/202 816$21KNo change
ALBEMARLE CORP (ALB 7.25 03/01/27) 7.25% DEP SHS A 300$11KNo change
SEATW Vivid Seats Inc. -CW26 *W EXP 10/18/202 22,000$2KNo change
CORZZ Core Scientific Inc. - 29 *W EXP 01/23/202 121$2KNo change
ISPOW Inspirato -CW30 *W EXP 02/11/202 15,000$186No change
PIIIW P3 Health Partne -CW27 *W EXP 11/19/202 8,598$80Add +10.7%

Total filed on the 13F, all lines: $37.6B.

Portfolio Sells Q2 2025 → Q3 2025

FISV Fiserv Inc. Reduce -8.2% 0.66% −0.35
V Visa Inc. Class A Reduce -5.3% 1.78% −0.26
ADBE Adobe Inc. Reduce -30.4% 0.37% −0.24
AMZN Amazon.com Inc. Reduce -1.9% 3.51% −0.22
CMG Chipotle Mexican Grill Inc. Reduce -35.3% 0.16% −0.20
ACN Accenture PLC Class A Reduce -23.8% 0.29% −0.19
CYBR Cyberark Software Ltd./Israel Reduce -82.3% 0.05% −0.18
ZTS Zoetis Inc. Reduce -16.5% 0.53% −0.18
PGR Progressive Corp. Reduce -4.4% 0.95% −0.17
COST Costco Wholesale Corp. Reduce -0.1% 1.36% −0.16
ISRG Intuitive Surgical Inc. Reduce -1.7% 0.55% −0.16
DXCM Dexcom Inc. Reduce -4.5% 0.38% −0.16
WDAY Workday Inc. Class A Reduce -17.3% 0.57% −0.15
MSFT Microsoft Corp. Reduce -2.4% 4.97% −0.13
RYAN Ryan Specialty Holdings Inc. Reduce -5.5% 0.40% −0.13
WSO Watsco Inc. Reduce -0.8% 0.86% −0.13
CPRT Copart Inc. Reduce -6.8% 0.57% −0.13
TDG Transdigm Group Inc. Reduce -0.2% 0.61% −0.12
ICE Intercontinental Exchange Inc. Reduce -1.3% 0.78% −0.12
SYK Stryker Corp. Reduce -0.5% 0.90% −0.11
CRM Salesforce Inc. Reduce -6.2% 0.39% −0.11
TYL Tyler Technologies Inc. Reduce -0.0% 0.59% −0.11
INTU Intuit Inc. Reduce -2.0% 0.46% −0.10
POOL Pool Corp. Reduce -32.5% 0.23% −0.10
MA Mastercard Inc. Class A Reduce -3.0% 1.48% −0.09
UNH Unitedhealth Group Inc. Reduce -45.6% 0.12% −0.09
NFLX Netflix Inc. Reduce -0.7% 0.48% −0.08
AME Ametek Inc. Reduce -23.3% 0.26% −0.08
CTAS Cintas Corp. Reduce -0.8% 0.55% −0.08
SBUX Starbucks Corp. Reduce -16.5% 0.21% −0.07
FOUR SHIFT4 Payments Inc. Class A Reduce -97.1% 0.00% −0.06
LULU Lululemon Athletica Inc. Reduce -49.3% 0.04% −0.06
AON Aon PLC Class A Reduce -6.7% 0.50% −0.06
GWRE Guidewire Software Inc. Reduce -1.4% 0.71% −0.06
NOVT Novanta Inc. Reduce -48.9% 0.04% −0.06
PG The Procter & Gamble Co. Reduce -5.3% 0.38% −0.05
LLY Eli Lilly & Co. Reduce -1.6% 0.61% −0.05
IBM Intl Business Machines Corp. Reduce -3.3% 0.35% −0.04
HON Honeywell International Inc. Reduce -9.9% 0.14% −0.04
WAB Wabtec Corp. Reduce -11.4% 0.17% −0.04
CBZ Cbiz Inc. Reduce -18.8% 0.05% −0.04
KMX Carmax Inc. Reduce -21.0% 0.04% −0.04
SG Sweetgreen Inc. Class A Reduce -52.4% 0.01% −0.04
KO The Coca-Cola Co. Reduce -1.8% 0.27% −0.04
ABT Abbott Laboratories Reduce -0.3% 0.57% −0.04
DHR Danaher Corp. Reduce -0.7% 0.72% −0.03
DT Dynatrace Inc. Reduce -23.9% 0.06% −0.03
DOCU Docusign Inc. Reduce -30.4% 0.05% −0.03
PTLO Portillo's Inc. Class A Reduce -22.3% 0.02% −0.03
SMH Vaneck Semiconductor ETF Reduce -61.4% 0.02% −0.03

Portfolio Buys Q2 2025 → Q3 2025

APP AppLovin Corp. Class A Add +106.5% 0.61% +0.46
GOOGL Alphabet Inc. Class A Add +0.0% 1.63% +0.40
NVDA Nvidia Corp. Add +0.8% 2.80% +0.35
BWXT BWX Technologies Inc. Add +18.7% 0.58% +0.18
META Meta Platforms Inc. Class A Add +17.7% 1.33% +0.14
ABBV Abbvie Inc. Add +0.5% 0.78% +0.13
FAST Fastenal Co. Add +2.1% 0.91% +0.11
CWAN Clearwater Analytics HDS-A Add +83.5% 0.34% +0.11
FANG Diamondback Energy Inc. Add +5608.2% 0.08% +0.08
JLL Jones Lang Lasalle Inc. Add +29.7% 0.23% +0.07
DOCS Doximity Inc. Class A Add +1990.7% 0.07% +0.07
TRU Transunion Add +573.7% 0.08% +0.07
QCOM Qualcomm Inc. Add +32.2% 0.26% +0.06
CSGP Costar Group Inc. Add +9.0% 0.70% +0.06
VOO Vanguard S&P 500 ETF Add +8.6% 0.54% +0.06
BX Blackstone Inc. Add +0.4% 0.62% +0.06
SPOT Spotify Technology SA Add +350.6% 0.07% +0.05
HD Home Depot Inc. Add +0.9% 0.83% +0.05
CRWD CrowdStrike Holdings Inc. Class A Add +28.9% 0.29% +0.05
VEU Vanguard Ftse All-World Ex-U Add +10.3% 0.43% +0.05
GLD SPDR Gold Shares Add +23.7% 0.17% +0.05
SHOP Shopify Inc. Class A Add +3.9% 0.21% +0.05
GE General Electric Add +18.1% 0.18% +0.04
IVV iShares Core S&P 500 ETF Add +2.3% 0.80% +0.04
NOW ServiceNow Inc. Add +21.8% 0.98% +0.04
ORLY O'reilly Automotive Inc. Add +0.5% 0.31% +0.04
RDVY First Trust Rising Dividend Add +57.4% 0.10% +0.04
MIAX Miami International Holdings New 0.04% +0.04
IT Gartner Inc. Add +198.6% 0.08% +0.04
PJUL Innovator U.S. Equity Power Add +82.2% 0.08% +0.03
DVN Devon Energy Corp. Add +725.2% 0.04% +0.03
COIN Coinbase Global Inc. Class A Add +39.0% 0.15% +0.03
MU Micron Technology Inc. Add +2.0% 0.13% +0.03
SHW The Sherwin-Williams Co. Add +89.5% 0.07% +0.03
GD General Dynamics Corp. Add +1.6% 0.26% +0.03
GS Goldman Sachs Group Inc. Add +2.1% 0.32% +0.03
PCOR Procore Technologies Inc. Add +11.2% 0.24% +0.03
WM Waste Management Inc. Add +20.0% 0.28% +0.03
VUG Vanguard Mrngstar GR ETF-Sui Add +6.8% 0.26% +0.03
SOFI Sofi Technologies Inc. Add +85.8% 0.04% +0.03
IWM iShares Russell 2000 ETF Add +1.4% 0.32% +0.03
PM Philip Morris International Add +50.3% 0.12% +0.03
VTI VG Morningstar TS MKT ETF-US Add +7.8% 0.25% +0.03
HOOD Robinhood Markets Inc. Class A Add +12.6% 0.07% +0.03
VXUS Vanguard Total Intl Stock Add +522.1% 0.03% +0.03
PLTR Palantir Technologies Inc. Class A Add +10.4% 0.08% +0.02
SAP Sap SE-Sponsored ADR New 0.02% +0.02
CAT Caterpillar Inc. Add +1.8% 0.15% +0.02
IEFA iShares Core MSCI Eafe ETF Add +15.0% 0.18% +0.02
IRTC Irhythm Holdings Inc. Add +0.2% 0.34% +0.02

Notes & Other Activity Q2 2025 → Q3 2025

WELLS FARGO & COMPANY (WFC 7.5 PERP L) PERP PFD CNV A Reduce -1.9% 785 $969K
LENDINGTREE INC (TREE 0.5 07/15/25) NOTE 0.500% 7/1 · principal Sold out 125,000 $123Kbefore exit
WAYFAIR INC (W 0.625 10/01/25) NOTE 0.625%10/0 · principal Sold out 99,000 $97Kbefore exit
NRG ENERGY INC (NRG 2.75 06/01/48) DBCV 2.750% 6/0 · principal Sold out 6,000 $24Kbefore exit
GCMGW GCM Grosvenor Inc. A -CW25 *W EXP 11/17/202 Sold out 7,895 $5Kbefore exit
PIIIW P3 Health Partne -CW27 *W EXP 11/19/202 Add +10.7% 8,598 $80

Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 1,957$38.4BAAPL, AMZN, MSFT, NVDA, GOOG
Q1 2026 1,876$34.9BAAPL, MSFT, AMZN, NVDA, GOOG
Q4 2025 1,845$37.3BMSFT, AAPL, AMZN, NVDA, GOOG
Q3 2025 1,828$37.6BMSFT, AAPL, AMZN, NVDA, GOOG
Q2 2025 1,804$36.0BMSFT, AMZN, AAPL, NVDA, V
Q1 2025 1,780$33.2BMSFT, AAPL, AMZN, V, NVDA
Q4 2024 1,792$34.4BMSFT, AAPL, AMZN, NVDA, V
Q3 2024 1,797$34.0BMSFT, AAPL, AMZN, V, IDXX
Q2 2024 1,781$32.4BMSFT, AAPL, AMZN, GOOG, V
Q1 2024 1,765$31.8BMSFT, AMZN, AAPL, IDXX, DXCM