What is BLAIR WILLIAM & CO/IL's portfolio value?

As of Q4 2025, BLAIR WILLIAM & CO/IL manages $37.3B across 1867 reported positions in their SEC 13F filing.

What are BLAIR WILLIAM & CO/IL's top holdings?

BLAIR WILLIAM & CO/IL's largest 13F positions include MSFT, AAPL, AMZN, representing approximately 12.7% of the reported portfolio.

How many stocks does BLAIR WILLIAM & CO/IL hold?

BLAIR WILLIAM & CO/IL holds 1867 reported positions as of their Q4 2025 13F filing.

When did BLAIR WILLIAM & CO/IL last file a 13F?

The most recent 13F filing from BLAIR WILLIAM & CO/IL reports positions as of Q4 2025. 13F filings are required within 45 days of each calendar quarter end.

BLAIR WILLIAM & CO/IL

CIK: 0000902367SEC EDGAR →

Portfolio Value

$37.3B

Holdings

1,867

As of

Q4 2025

New Positions

100

Closed Positions

Top 10 Holdings

Rank	Stock	Shares	Value	% of Portfolio
1	MSFT MICROSOFT CORP	3,574,568	$1.7B	4.64%
2	AAPL APPLE INC	5,949,948	$1.6B	4.34%
3	AMZN AMAZON COM INC	6,064,424	$1.4B	3.75%
4	NVDA NVIDIA CORPORATION	5,494,350	$1.0B	2.75%
5	GOOG ALPHABET INC	3,118,759	$978.0M	2.62%
6	GOOGL ALPHABET INC	2,493,580	$779.0M	2.09%
7	JPM JPMORGAN CHASE & CO.	2,309,809	$744.0M	2.00%
8	V VISA INC	1,929,237	$676.0M	1.81%
9	APH AMPHENOL CORP NEW	2,653,891	$358.0M	0.96%
10	NOW SERVICENOW INC	2,214,840	$338.0M	0.91%

Quarterly Changes

Top Buys

META↑ Increased

$497.1M

GEV↑ Increased

$385.8M

IVV↑ Increased

$298.4M

LLY↑ Increased

$228.2M

BRK/B↑ Increased

$223.6M

Top Sells

IDXX↓ Decreased

$658.5M

SPY↓ Decreased

$571.9M

MA↓ Decreased

$554.0M

COST↓ Decreased

$510.1M

T7D↓ Decreased

$227.3M

New Positions (124)

$21.0M · 91K shares

$11.0M · 254K shares

$5.0M · 85K shares

$3.0M · 113K shares

$3.0M · 37K shares

$2.0M · 57K shares

$2.0M · 137K shares

$2.0M · 371K shares

$2.0M · 48K shares

$1.0M · 30K shares

$1.0M · 15K shares

$1.0M · 42K shares

$1.0M · 23K shares

$1.0M · 52K shares

$1.0M · 25K shares

$1.0M · 18K shares

$1.0M · 43K shares

$1.0M · 27K shares

$1.0M · 12K shares

$0 · 600 shares

$0 · 19K shares

$0 · 2K shares

$0 · 140 shares

$0 · 19K shares

$0 · 4K shares

$0 · 2K shares

$0 · 2K shares

$0 · 11 shares

$0 · 18 shares

$0 · 385 shares

$0 · 10K shares

$0 · 18 shares

$0 · 4K shares

$0 · 6 shares

$0 · 24K shares

$0 · 27K shares

$0 · 6 shares

$0 · 6K shares

$0 · 6K shares

$0 · 31K shares

$0 · 3K shares

$0 · 4K shares

$0 · 15K shares

$0 · 4K shares

$0 · 2K shares

$0 · 17K shares

$0 · 13K shares

$0 · 752 shares

$0 · 56K shares

$0 · 1K shares

$0 · 10K shares

$0 · 10K shares

$0 · 8K shares

$0 · 15K shares

$0 · 70 shares

$0 · 2K shares

$0 · 176 shares

$0 · 3K shares

$0 · 3K shares

$0 · 34 shares

$0 · 24K shares

$0 · 215 shares

$0 · 4K shares

$0 · 10K shares

$0 · 5K shares

$0 · 6K shares

$0 · 27K shares

$0 · 5K shares

$0 · 17K shares

$0 · 274 shares

$0 · 2K shares

$0 · 14K shares

$0 · 10K shares

$0 · 11K shares

$0 · 11K shares

$0 · 190 shares

$0 · 18 shares

$0 · 3K shares

$0 · 4K shares

$0 · 9K shares

$0 · 2K shares

$0 · 41K shares

$0 · 8K shares

$0 · 4K shares

$0 · 51K shares

$0 · 80 shares

$0 · 7K shares

$0 · 1K shares

$0 · 1K shares

$0 · 1K shares

$0 · 6K shares

$0 · 1K shares

$0 · 12K shares

$0 · 4K shares

$0 · 250 shares

$0 · 2K shares

$0 · 170 shares

$0 · 65K shares

$0 · 9K shares

$0 · 274K shares

$0 · 4K shares

$0 · 355 shares

$0 · 411 shares

$0 · 37K shares

$0 · 17K shares

$0 · 164 shares

$0 · 325 shares

$0 · 15K shares

$0 · 15K shares

$0 · 7K shares

$0 · 28K shares

$0 · 2 shares

$0 · 1K shares

$0 · 5K shares

$0 · 2K shares

$0 · 599 shares

$0 · 12K shares

$0 · 3K shares

$0 · 5K shares

$0 · 3K shares

$0 · 45 shares

$0 · 9K shares

$0 · 1K shares

$0 · 13K shares

Closed Positions (101)

BNKK

$55.1M · 205K shares

SAP

$9.2M · 34K shares

$6.2M · 105K shares

TTEN

$4.8M · 81K shares

$4.4M · 552K shares

LNWO

$1.7M · 20K shares

$863K · 72K shares

$770K · 16K shares

$735K · 9K shares

$536K · 36K shares

$510K · 11K shares

$467K · 10K shares

$423K · 2K shares

$416K · 241K shares

$376K · 32K shares

$376K · 21K shares

$374K · 3K shares

$373K · 22K shares

$370K · 10K shares

$362K · 365K shares

$361K · 5K shares

$356K · 2K shares

$348K · 13K shares

$334K · 715 shares

$331K · 2K shares

$318K · 19K shares

$314K · 4K shares

$308K · 6K shares

$304K · 1K shares

$301K · 6K shares

$294K · 2K shares

$289K · 5K shares

$284K · 6K shares

$281K · 20K shares

$281K · 10K shares

$280K · 5K shares

$270K · 2K shares

$266K · 2K shares

$266K · 67K shares

$256K · 7K shares

$253K · 19K shares

$253K · 3K shares

$252K · 2K shares

$251K · 7K shares

$246K · 14K shares

$242K · 11K shares

$233K · 918 shares

$230K · 6K shares

$227K · 8K shares

$226K · 687 shares

$226K · 3K shares

$222K · 7K shares

$222K · 3K shares

$219K · 3K shares

$218K · 3K shares

$214K · 4K shares

$213K · 494 shares

$212K · 5K shares

$211K · 3K shares

$209K · 1K shares

$209K · 525 shares

$205K · 2K shares

$205K · 6K shares

$203K · 2K shares

$202K · 1K shares

$201K · 731 shares

$201K · 7K shares

$200K · 10K shares

$200K · 7K shares

$195K · 12K shares

$186K · 27K shares

$161K · 10K shares

IMCV

$156K · 2K shares

MBLY

$149K · 11K shares

BCSF

$147K · 10K shares

$142K · 12K shares

$136K · 12K shares

$130K · 24K shares

$122K · 13K shares

$77K · 795 shares

$68K · 2K shares

$60K · 13K shares

$47K · 31K shares

$45K · 13K shares

$36K · 3K shares

$27K · 23K shares

$26K · 147 shares

$25K · 20K shares

$24K · 1K shares

$16K · 169 shares

$13K · 694 shares

$13K · 151 shares

$10K · 139 shares

$9K · 100 shares

$7K · 10K shares

$6K · 400 shares

$5K · 150 shares

$4K · 96 shares

$3K · 143 shares

$371 · 4 shares

$264 · 12 shares

Sector Breakdown

Sector	# Holdings	Value	%
Technology	212	$9.2B	30.4%
Financial Services	821	$7.1B	23.7%
Industrials	182	$3.3B	11.0%
Consumer Cyclical	105	$2.7B	8.9%
Healthcare	151	$2.5B	8.2%
Communication Services	39	$2.1B	7.1%
Unknown	125	$964.7M	3.2%
Consumer Defensive	41	$733.4M	2.4%
Energy	55	$498.0M	1.7%
Real Estate	42	$476.0M	1.6%
Basic Materials	49	$458.0M	1.5%
Utilities	45	$116.4M	0.4%