Blair William & Co.

In its 13F for Q4 2024 (holdings as of December 31, 2024, filed February 12, 2025), Blair William & Co. reported 1,792 stock positions worth $34.4 billion. Its top holding was Microsoft (MSFT) at 4.7% of the portfolio, followed by Apple (AAPL, 4.6%) and Amazon.com (AMZN, 3.9%). Compared with Q3 2024, it opened 82 new positions, sold out of 87, added to 648 and reduced 787. The biggest buy was Amazon.com (AMZN, shares +1%) and the biggest sale Idexx Laboratories (IDXX, shares −5%).

Most Recent 13F
Q2 2026
Location
CHICAGO, IL
CIK
0000902367
Portfolio Value
$34.4B (Q4 2024)
SEC Filing
0001104659-25-011872 ↗ filed Feb 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 $34.4B Q4 2024 Q1 2025: $33.2B Q1 2025 Q2 2025: $36.0B Q2 2025 Q3 2025: $37.6B Q3 2025 Q4 2025: $37.3B Q4 2025 Q1 2026: $34.9B Q1 2026 Q2 2026: $38.4B Q2 2026

Holdings 1,792 stocks · $34.4B

MSFT Microsoft Corp. 4.67% 3,811,770 $1.6B Add +1.1%
AAPL Apple Inc. 4.57% 6,277,205 $1.6B Reduce -1.7%
AMZN Amazon.com Inc. 3.93% 6,163,344 $1.4B Add +1.1%
NVDA Nvidia Corp. 1.97% 5,040,883 $676.9M Add +7.4%
V Visa Inc. Class A 1.92% 2,089,726 $660.4M Reduce -2.9%
GOOG Alphabet Inc. Class C 1.80% 3,253,651 $619.6M Reduce -1.8%
JPM JPMorgan Chase & Co. 1.66% 2,384,611 $571.6M Reduce -1.0%
MA Mastercard Inc. Class A 1.59% 1,039,691 $547.5M Reduce -0.1%
COST Costco Wholesale Corp. 1.57% 588,056 $538.8M Reduce -0.1%
GOOGL Alphabet Inc. Class A 1.43% 2,591,086 $490.5M Reduce -1.3%
SPY SS SPDR S&P 500 ETF Trust-US 1.40% 819,692 $480.4M Add +1.8%
IDXX Idexx Laboratories Inc. 1.33% 1,105,014 $456.9M Reduce -5.2%
FISV Fiserv Inc. 1.24% 2,074,202 $426.1M Reduce -1.7%
DHR Danaher Corp. 1.15% 1,717,881 $394.3M Reduce -2.7%
PGR Progressive Corp. 1.11% 1,586,218 $380.1M Reduce -1.4%
WSO Watsco Inc. 1.06% 770,936 $365.3M Reduce -1.8%
ZTS Zoetis Inc. 1.06% 2,240,186 $365.0M Reduce -5.4%
SYK Stryker Corp. 0.98% 931,674 $335.4M Add +0.1%
NOW ServiceNow Inc. 0.95% 308,283 $326.8M Reduce -0.8%
CPRT Copart Inc. 0.86% 5,175,453 $297.0M Reduce -0.9%
HD Home Depot Inc. 0.86% 755,641 $293.9M Add +0.4%
WDAY Workday Inc. Class A 0.84% 1,123,106 $289.8M Reduce -3.5%
ADBE Adobe Inc. 0.80% 621,304 $276.3M Reduce -4.6%
ICE Intercontinental Exchange Inc. 0.78% 1,799,061 $268.1M Reduce -2.4%
LLY Eli Lilly & Co. 0.75% 334,361 $258.1M Reduce -1.5%
ACN Accenture PLC Class A 0.75% 731,875 $257.5M Add +13.6%
VEEV Veeva Systems Inc. Class A 0.74% 1,216,231 $255.7M Add +0.3%
TYL Tyler Technologies Inc. 0.73% 433,821 $250.2M Reduce -2.9%
ISRG Intuitive Surgical Inc. 0.71% 468,880 $244.7M Add +0.9%
CSGP Costar Group Inc. 0.71% 3,393,951 $243.0M Reduce -11.9%
UBER Uber Technologies Inc. 0.71% 4,022,575 $242.6M Reduce -1.5%
IVV iShares Core S&P 500 ETF 0.70% 410,742 $241.8M Add +4.3%
POOL Pool Corp. 0.70% 708,190 $241.5M Reduce -7.3%
CRM Salesforce Inc. 0.69% 713,634 $238.6M Reduce -1.0%
PANW Palo Alto Networks Inc. 0.69% 1,304,027 $237.3M Add +0.9%
FAST Fastenal Co. 0.68% 3,256,767 $234.2M Reduce -0.5%
BX Blackstone Inc. 0.68% 1,352,435 $233.2M Add +1.3%
INTU Intuit Inc. 0.67% 365,518 $229.7M Reduce -10.2%
WMT Walmart Inc. 0.66% 2,506,613 $226.5M Reduce -1.7%
TDG Transdigm Group Inc. 0.66% 178,343 $226.0M Add +0.4%
META Meta Platforms Inc. Class A 0.64% 377,272 $220.9M Add +5.8%
AXP American Express Co. 0.62% 720,237 $213.8M Reduce -1.6%
ABBV Abbvie Inc. 0.62% 1,201,107 $213.4M Add +2.5%
APH Amphenol Corp. Class A 0.62% 3,070,194 $213.2M Reduce -0.7%
P Everpure Inc. Class A filed as PURE STORAGE INC 0.62% 3,444,714 $211.6M Add +10.2%
GWRE Guidewire Software Inc. 0.60% 1,213,515 $204.6M Reduce -2.8%
AON Aon PLC Class A 0.59% 564,247 $202.7M Reduce -4.8%
ECL Ecolab Inc. 0.58% 844,034 $197.8M Reduce -2.9%
BRK.B Berkshire Hathaway Inc. Class B 0.55% 419,119 $190.0M Add +2.8%
UNH Unitedhealth Group Inc. 0.54% 369,909 $187.1M Reduce -5.8%
CTAS Cintas Corp. 0.54% 1,012,398 $185.0M Add +1.4%
AVGO Broadcom Inc. 0.52% 767,292 $177.9M Add +13.6%
ABT Abbott Laboratories 0.52% 1,572,084 $177.8M Reduce -1.7%
RYAN Ryan Specialty Holdings Inc. 0.52% 2,765,963 $177.5M Add +0.6%
DXCM Dexcom Inc. 0.51% 2,232,647 $173.6M Reduce -18.6%
PG The Procter & Gamble Co. 0.48% 986,834 $165.4M Reduce -1.0%
VEA Vanguard Ftse Developed ETF 0.44% 3,153,008 $150.8M Add +1.0%
JNJ Johnson & Johnson 0.42% 1,003,860 $145.2M Reduce -4.7%
AMT American Tower Corp. 0.42% 790,497 $145.0M Reduce -0.7%
CMG Chipotle Mexican Grill Inc. 0.42% 2,403,659 $144.9M Add +3.3%
AAON Aaon Inc. 0.40% 1,169,782 $137.7M Add +4.2%
VOO Vanguard S&P 500 ETF 0.40% 255,034 $137.4M Add +6.2%
QQQ Invesco QQQ Trust Series 1 0.38% 253,793 $129.7M Add +8.8%
VIG Vanguard Dividend Apprec ETF 0.37% 650,925 $127.5M Reduce -0.5%
AME Ametek Inc. 0.37% 706,402 $127.3M Reduce -1.6%
UNP Union Pacific Corp. 0.37% 556,630 $126.9M Reduce -6.9%
XYZ Block Inc. 0.36% 1,474,681 $125.3M Add +199.7%
NFLX Netflix Inc. 0.35% 136,390 $121.6M Reduce -0.2%
VTV Vanguard Mrngstr Val ETF-Aui 0.35% 708,997 $120.0M Add +3.2%
SBUX Starbucks Corp. 0.34% 1,287,827 $117.5M Reduce -4.2%
IWM iShares Russell 2000 ETF 0.34% 529,808 $117.1M Add +7.2%
VEU Vanguard Ftse All-World Ex-U 0.33% 1,958,504 $112.4M Reduce -6.2%
TSLA Tesla Inc. 0.32% 274,154 $110.7M Add +12.5%
ITW Illinois Tool Works 0.31% 426,768 $108.2M Add +1.1%
VRSK Verisk Analytics Inc. 0.31% 391,444 $107.8M Reduce -3.5%
SCHW Schwab (charles) Corp. 0.31% 1,430,811 $105.9M Reduce -7.9%
ORCL Oracle Corp. 0.30% 621,859 $103.6M Add +12.4%
XOM Exxon Mobil Corp. 0.30% 957,774 $103.0M Reduce -0.0%
SPGI S&P Global Inc. 0.30% 206,489 $102.8M Add +5.2%
LIN Linde PLC 0.30% 243,274 $101.9M Reduce -5.8%
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.30% 462,753 $101.7M Add +0.5%
ROL Rollins Inc. 0.29% 2,176,043 $100.9M Add +5.7%
MRK Merck & Co. Inc. 0.29% 1,008,963 $100.4M Add +0.7%
IUSV iShares Core S&P U.S. Value 0.29% 1,079,686 $100.0M Reduce -6.8%
MCD McDonald's Corp. 0.29% 343,731 $99.6M Add +2.5%
KO The Coca-Cola Co. 0.28% 1,566,028 $97.5M Reduce -4.5%
LYV Live Nation Entertainment Inc. 0.28% 740,429 $95.9M Reduce -8.2%
CVX Chevron Corp. 0.27% 651,414 $94.4M Reduce -2.0%
MSI Motorola Solutions Inc. 0.27% 203,478 $94.1M Add +3.9%
ANET Arista Networks Inc. 0.27% 837,152 $92.5M Reduce -1.8%
GS Goldman Sachs Group Inc. 0.26% 155,915 $89.3M Add +8.4%
ROK Rockwell Automation Inc. 0.26% 310,926 $88.9M Reduce -2.9%
ORLY O'reilly Automotive Inc. 0.26% 73,951 $87.7M Add +0.6%
IWF iShares Russell 1000 Growth 0.25% 216,605 $87.0M Add +7.5%
MDB Mongodb Inc. 0.25% 370,457 $86.2M Add +24.4%
PEP Pepsico Inc. 0.25% 558,547 $84.9M Reduce -5.7%
GD General Dynamics Corp. 0.24% 318,274 $83.9M Reduce -9.5%
ALL Allstate Corp. 0.23% 417,448 $80.5M Reduce -0.6%
GNRC Generac Holdings Inc. 0.23% 513,449 $79.6M Add +3.3%
LOW Lowe's Cos Inc. 0.23% 320,775 $79.2M Reduce -1.5%

Show all 1,792 holdings

Other holdings (24): bonds, preferreds, convertibles and warrants · $5.8M (not counted above)
SecurityClassShares / PrincipalValueChange
RINGCENTRAL INC (RNG 0 03/01/25) NOTE 3/0 · principal 2,523,000$2.5MReduce -12.2%
CORZW Core Scientific Inc. - 27 *W EXP 01/23/202 114,509$941KReduce -6.2%
TELADOC HEALTH INC (TDOC 1.25 06/01/27) NOTE 1.250% 6/0 · principal 525,000$458KNo change
WELLS FARGO & COMPANY (WFC 7.5 PERP L) PERP PFD CNV A 342$408KReduce -2.0%
EVOLENT HEALTH INC (EVH 1.5 10/15/25) NOTE 1.500%10/1 · principal 365,000$352KNo change
BANK OF AMERICA CORP (BAC 7.25 PERP L) 7.25%CNV PFD L 268$327KNo change
WOLF Wolfspeed Inc. (wolf 0.25 02/15/28) NOTE 0.250% 2/1 · principal 500,000$230KNo change
LENDINGTREE INC (TREE 0.5 07/15/25) NOTE 0.500% 7/1 · principal 150,000$143KNo change
WAYFAIR INC (W 0.625 10/01/25) NOTE 0.625%10/0 · principal 99,000$95KNo change
PELOTON INTERACTIVE INC (PTON 0 02/15/26) NOTE 2/1 · principal 100,000$93KNo change
AVPTW Avepoint Inc.-CW24 *W EXP 09/18/202 10,000$57KNo change
PROSPECT CAPITAL CORP (PSEC 6.375 03/01/25) NOTE 6.375% 3/0 · principal 50,000$50KNo change
OXY.WS Occidental Petroleum-CW27 *W EXP 08/03/202 1,445$40KReduce -0.1%
BOEING CO/THE (BA 6 10/15/27) DEP CONV PFD A 562$34KNew
GCMGW GCM Grosvenor Inc. A -CW25 *W EXP 11/17/202 21,790$27KAdd +16.0%
DISH NETWORK CORP (DISH 3.375 08/15/26) NOTE 3.375% 8/1 · principal 25,000$21KNo change
CHEGG INC (CHGG 0.125 03/15/25) NOTE 0.125% 3/1 · principal 20,000$19KReduce -50.0%
NRG ENERGY INC (NRG 2.75 06/01/48) DBCV 2.750% 6/0 · principal 6,000$13KNo change
HTZWW Hertz Global Hldgs Inc. -CW51 *W EXP 06/30/205 5,602$12KNo change
HOLLEY INC *W EXP 11/30/202 155,900$9KAdd +477.4%
SEATW Vivid Seats Inc. -CW26 *W EXP 10/18/202 22,000$8KAdd +214.3%
CORZZ Core Scientific Inc. - 29 *W EXP 01/23/202 121$2KReduce -98.1%
ISPOW Inspirato -CW30 *W EXP 02/11/202 15,000$150No change
PIIIW P3 Health Partne -CW27 *W EXP 11/19/202 7,765$92No change

Total filed on the 13F, all lines: $34.4B.

Portfolio Sells Q3 2024 → Q4 2024

IDXX Idexx Laboratories Inc. Reduce -5.2% 1.33% −0.40
ZTS Zoetis Inc. Reduce -5.4% 1.06% −0.30
DHR Danaher Corp. Reduce -2.7% 1.15% −0.29
UBER Uber Technologies Inc. Reduce -1.5% 0.71% −0.20
ADBE Adobe Inc. Reduce -4.6% 0.80% −0.19
CSGP Costar Group Inc. Reduce -11.9% 0.71% −0.15
POOL Pool Corp. Reduce -7.3% 0.70% −0.14
BAH Booz Allen Hamilton Holdings Reduce -26.8% 0.19% −0.14
LLY Eli Lilly & Co. Reduce -1.5% 0.75% −0.13
UNH Unitedhealth Group Inc. Reduce -5.8% 0.54% −0.13
EVH Evolent Health Inc. Class A Reduce -23.1% 0.05% −0.12
AMT American Tower Corp. Reduce -0.7% 0.42% −0.12
MCHP Microchip Technology Inc. Reduce -32.4% 0.11% −0.12
PGR Progressive Corp. Reduce -1.4% 1.11% −0.09
VRTX Vertex Pharmaceuticals Inc. Reduce -70.8% 0.03% −0.09
ICE Intercontinental Exchange Inc. Reduce -2.4% 0.78% −0.09
ICLR Icon PLC Reduce -77.3% 0.02% −0.09
JNJ Johnson & Johnson Reduce -4.7% 0.42% −0.08
ECL Ecolab Inc. Reduce -2.9% 0.58% −0.08
NEOG Neogen Corp. Reduce -17.7% 0.11% −0.08
GWRE Guidewire Software Inc. Reduce -2.8% 0.60% −0.08
INTU Intuit Inc. Reduce -10.2% 0.67% −0.07
WSO Watsco Inc. Reduce -1.8% 1.06% −0.07
GD General Dynamics Corp. Reduce -9.5% 0.24% −0.07
LIN Linde PLC Reduce -5.8% 0.30% −0.07
UNP Union Pacific Corp. Reduce -6.9% 0.37% −0.06
KO The Coca-Cola Co. Reduce -4.5% 0.28% −0.06
ALGN Align Technology Inc. Reduce -46.5% 0.05% −0.06
VEU Vanguard Ftse All-World Ex-U Reduce -6.2% 0.33% −0.06
AMGN Amgen Inc. Reduce -10.8% 0.14% −0.05
MKC McCormick & Co.-Non VTG SHRS Reduce -35.3% 0.07% −0.05
PEP Pepsico Inc. Reduce -5.7% 0.25% −0.05
TMO Thermo Fisher Scientific Inc. Reduce -1.1% 0.22% −0.05
TTEK Tetra Tech Inc. Reduce -61.1% 0.02% −0.04
SBUX Starbucks Corp. Reduce -4.2% 0.34% −0.04
TYL Tyler Technologies Inc. Reduce -2.9% 0.73% −0.04
NKE Nike Inc. Class B Reduce -29.2% 0.05% −0.04
PHR Phreesia Inc. Reduce -78.6% 0.01% −0.03
DXCM Dexcom Inc. Reduce -18.6% 0.51% −0.03
ULTA Ulta Beauty Inc. Reduce -50.5% 0.04% −0.03
IUSV iShares Core S&P U.S. Value Reduce -6.8% 0.29% −0.03
PFE Pfizer Inc. Reduce -7.8% 0.18% −0.03
PTLO Portillo's Inc. Class A Reduce -26.6% 0.03% −0.03
DELL Dell Technologies -C Reduce -55.3% 0.02% −0.03
XOM Exxon Mobil Corp. Reduce -0.0% 0.30% −0.03
HOLX Hologic Inc. Reduce -42.9% 0.03% −0.03
LOW Lowe's Cos Inc. Reduce -1.5% 0.23% −0.03
DOW Dow Inc. Reduce -41.8% 0.02% −0.03
ASML ASML Holding NV-NY Reg SHS Reduce -54.8% 0.02% −0.03
CDW CDW Corp. Reduce -16.0% 0.05% −0.03

Portfolio Buys Q3 2024 → Q4 2024

AMZN Amazon.com Inc. Add +1.1% 3.93% +0.60
NVDA Nvidia Corp. Add +7.4% 1.97% +0.30
XYZ Block Inc. Add +199.7% 0.36% +0.27
AVGO Broadcom Inc. Add +13.6% 0.52% +0.18
BLK BlackRock Inc. New 0.16% +0.16
P Everpure Inc. Class A Add +10.2% 0.62% +0.15
CWAN Clearwater Analytics HDS-A Add +3835.2% 0.14% +0.14
TSLA Tesla Inc. Add +12.5% 0.32% +0.13
BA The Boeing Co. Add +150.3% 0.19% +0.13
BWXT BWX Technologies Inc. Add +949.0% 0.14% +0.12
ACN Accenture PLC Class A Add +13.6% 0.75% +0.08
BX Blackstone Inc. Add +1.3% 0.68% +0.08
RBC RBC Bearings Inc. Add +89.4% 0.16% +0.08
PCOR Procore Technologies Inc. Add +43.9% 0.17% +0.07
GEV GE Vernova Inc. Add +86.6% 0.13% +0.07
AXON Axon Enterprise Inc. Add +21.8% 0.16% +0.07
NDAQ Nasdaq Inc. Add +92.0% 0.12% +0.06
CRWD CrowdStrike Holdings Inc. Class A Add +28.9% 0.15% +0.06
TWLO Twilio Inc. Class A Add +173.9% 0.07% +0.05
GS Goldman Sachs Group Inc. Add +8.4% 0.26% +0.05
AAON Aaon Inc. Add +4.2% 0.40% +0.04
RSP Invesco S&P 500 Equal Weight Add +35.6% 0.19% +0.04
META Meta Platforms Inc. Class A Add +5.8% 0.64% +0.04
QQQ Invesco QQQ Trust Series 1 Add +8.8% 0.38% +0.04
ISRG Intuitive Surgical Inc. Add +0.9% 0.71% +0.04
PANW Palo Alto Networks Inc. Add +0.9% 0.69% +0.04
SPY SS SPDR S&P 500 ETF Trust-US Add +1.8% 1.40% +0.04
BMY Bristol-Myers Squibb Co. Add +36.9% 0.12% +0.04
SHOP Shopify Inc. Class A Add +2.1% 0.14% +0.04
IVV iShares Core S&P 500 ETF Add +4.3% 0.70% +0.04
CW Curtiss-Wright Corp. Add +58.5% 0.09% +0.04
FOUR SHIFT4 Payments Inc. Class A Add +1396.4% 0.04% +0.03
IUSG iShares Core S&P U.S. Growth Add +29.5% 0.13% +0.03
BJ Bj's Wholesale Club Holdings Add +32.6% 0.11% +0.03
IWF iShares Russell 1000 Growth Add +7.5% 0.25% +0.03
PDEC Innovator U.S. Equity Power Add +67.6% 0.07% +0.03
CMG Chipotle Mexican Grill Inc. Add +3.3% 0.42% +0.03
SMMD iShares Russell 2500 ETF Add +174.5% 0.04% +0.03
VOO Vanguard S&P 500 ETF Add +6.2% 0.40% +0.03
CYBR Cyberark Software Ltd./Israel Add +5.2% 0.16% +0.03
ORCL Oracle Corp. Add +12.4% 0.30% +0.02
WM Waste Management Inc. Add +69.8% 0.06% +0.02
RBA RB Global Inc. Add +0.8% 0.21% +0.02
VRT Vertiv Holdings Co. Class A Add +979.8% 0.02% +0.02
FTAI Ftai Aviation Ltd. Add +285.3% 0.03% +0.02
CBZ Cbiz Inc. Add +4.2% 0.10% +0.02
IWM iShares Russell 2000 ETF Add +7.2% 0.34% +0.02
XMTR Xometry Inc. Class A Add +2.9% 0.03% +0.02
ETN Eaton Corp. PLC Add +32.4% 0.08% +0.02
WFC Wells Fargo & Co. Add +17.6% 0.06% +0.02

Notes & Other Activity Q3 2024 → Q4 2024

RINGCENTRAL INC (RNG 0 03/01/25) NOTE 3/0 · principal Reduce -12.2% 2,523,000 $2.5M
CORZW Core Scientific Inc. - 27 *W EXP 01/23/202 Reduce -6.2% 114,509 $941K
WELLS FARGO & COMPANY (WFC 7.5 PERP L) PERP PFD CNV A Reduce -2.0% 342 $408K
CHEGG INC (CHGG 0 09/01/26) NOTE 9/0 · principal Sold out 150,000 $114Kbefore exit
OXY.WS Occidental Petroleum-CW27 *W EXP 08/03/202 Reduce -0.1% 1,445 $40K
BOEING CO/THE (BA 6 10/15/27) DEP CONV PFD A New 562 $34K
GCMGW GCM Grosvenor Inc. A -CW25 *W EXP 11/17/202 Add +16.0% 21,790 $27K
CHEGG INC (CHGG 0.125 03/15/25) NOTE 0.125% 3/1 · principal Reduce -50.0% 20,000 $19K
HOLLEY INC *W EXP 11/30/202 Add +477.4% 155,900 $9K
SEATW Vivid Seats Inc. -CW26 *W EXP 10/18/202 Add +214.3% 22,000 $8K
CORZZ Core Scientific Inc. - 29 *W EXP 01/23/202 Reduce -98.1% 121 $2K

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