SEC holdings report of an institutional investment manager
What does BLAIR WILLIAM & CO/IL report holding?
BLAIR WILLIAM & CO/IL reported holdings of $38.39 billion on Form 13F for the quarter ended 30 June 2026, ranked 218th of 8,857 managers by reported value. The report was filed on .
Reported value
BLAIR WILLIAM & CO/IL reported holdings of $38.39 billion on Form 13F for the quarter ended 30 June 2026, ranked 218th of 8,857 managers by reported value.
In the quarter before, the quarter ended 31 March 2026, it reported $34.90 billion, so the value is up from then (+10.0%).
Its table has 2,054 entries, which make 1,998 positions when the lines of a security are summed.
The filing
Filed on for the quarter ended 30 June 2026; the manager is in CHICAGO, IL.
The SEC's accession number of the filing is 0001104659-26-093821. The filing is the manager's own. This page shows the value it states for its table and the lines of the table, summed.
As filed
Facts as filed with the SEC, and our arithmetic on them. Not investment advice.
Understanding the report of BLAIR WILLIAM & CO/IL
Where it stands today
BLAIR WILLIAM & CO/IL reported $38.4 billion for the quarter ended 30 June 2026, ranked 218th of 8,857 managers.
Where do these numbers come from?
An institutional investment manager that holds 100 million dollars or more of the securities Form 13F covers files a report with the SEC every quarter. This page shows the report of BLAIR WILLIAM & CO/IL for the quarter ended 30 June 2026.
Read more
The rank counts every manager that filed a holdings report for the quarter, by the total value its table states, the largest first.
The numbers behind the chart
What are the largest holdings of BLAIR WILLIAM & CO/IL?25 positions
| Issuer, as filed | Class | Value | Share of its value | Shares | Change from 31 March 2026 |
|---|---|---|---|---|---|
| APPLE INC | COM | $1.66B | 4.3% | 5.73M | −3.4% |
| AMAZON COM INC | COM | $1.40B | 3.6% | 5.88M | −3.0% |
| MICROSOFT CORP | COM | $1.28B | 3.3% | 3.44M | −1.6% |
| NVIDIA CORPORATION | COM | $1.08B | 2.8% | 5.37M | −1.0% |
| ALPHABET INC | CAP STK CL C | $1.04B | 2.7% | 2.95M | −2.7% |
| ALPHABET INC | CAP STK CL A | $859M | 2.2% | 2.40M | −1.4% |
| GE VERNOVA INC | COM | $775M | 2.0% | 660K | −0.7% |
| JPMORGAN CHASE & CO | COM | $743M | 1.9% | 2.27M | −1.6% |
| STATE STR SPDR [index name] ETF T | TR UNIT | $633M | 1.6% | 848K | +0.3% |
| VISA INC | COM CL A | $632M | 1.6% | 1.84M | −0.2% |
| COSTCO WHOLESALE CORPORATION | COM | $491M | 1.3% | 525K | +0.7% |
| IDEXX LABS INC | COM | $484M | 1.3% | 919K | −2.9% |
| AMPHENOL CORP | CL A | $442M | 1.2% | 2.50M | −0.6% |
| MASTERCARD INCORPORATED | CL A | $433M | 1.1% | 842K | −8.8% |
| INVESCO EXCHANGE TRADED FD T | [index name] EQL WGT | $422M | 1.1% | 1.98M | +18.0% |
| PALO ALTO NETWORKS INC | COM | $418M | 1.1% | 1.23M | −6.0% |
| ELI LILLY & CO | COM | $416M | 1.1% | 347K | +7.1% |
| META PLATFORMS INC | CL A | $378M | 0.98% | 671K | −7.0% |
| VANGUARD INTL EQUITY INDEX F | ALLWRLD EX US | $375M | 0.98% | 4.48M | +7.5% |
| MICRON TECHNOLOGY INC | COM | $365M | 0.95% | 316K | −4.9% |
| ISHARES TR | CORE [index name] ETF | $363M | 0.95% | 485K | −0.2% |
| FASTENAL CO | COM | $356M | 0.93% | 7.41M | +0.5% |
| BROADCOM INC | COM | $351M | 0.91% | 930K | +1.2% |
| ABBVIE INC | COM | $324M | 0.84% | 1.29M | −3.5% |
| VANGUARD TAX-MANAGED FDS | VAN FTSE DEV MKT | $306M | 0.80% | 4.29M | +11.1% |
The table scrolls sideways; the first column stays in place.
Which positions are new in the quarter ended 30 June 2026?10 positions, the largest first
| Issuer, as filed | Class | Value |
|---|---|---|
| HONEYWELL INTL INC | COM | $102M |
| HONEYWELL AEROSPACE INC | COM | $100M |
| PATTERN GROUP INC | COM SER A | $17.7M |
| SPACE EXPLORATION TECHN CORP | CLASS A COM STK | $10.2M |
| CARDINAL INFRASTRUCTURE GROU | CL A | $9.25M |
| CEREBRAS SYSTEMS INC | COM CL A | $6.41M |
| DUPONT DE NEMOURS INC | COMMON STOCK | $3.37M |
| HEARTFLOW INC | COM | $3.01M |
| NEBIUS GROUP N.V. | SHS CLASS A | $2.68M |
| FEDEX FGHT HLDG CO INC | COMMON STOCK | $2.57M |
Which positions were sold out since the quarter ended 31 March 2026?10 positions, the largest first
| Issuer, as filed | Class | Value then |
|---|---|---|
| EXXON MOBIL CORP | COM | $161M |
| HONEYWELL INTL INC | COM | $66.9M |
| HURON CONSULTING GROUP INC | COM | $6.56M |
| PRESTIGE CONSMR HEALTHCARE I | COM | $6.31M |
| DUPONT DE NEMOURS INC | COM | $3.47M |
| EXPONENT INC | COM | $1.88M |
| CLEARWATER ANALYTICS HLDGS I | CL A | $1.83M |
| RLI CORP | COM | $1.80M |
| ISHARES INC | MSCI ISRAEL ETF | $1.75M |
| OSI SYSTEMS INC | COM | $1.46M |
What did BLAIR WILLIAM & CO/IL report in each quarter?8 quarters
| Quarter ended | Filed | Value reported | Entries | Rank |
|---|---|---|---|---|
| $38.4B | 2,054 | 218 | ||
| $34.9B | 1,922 | 200 | ||
| $37.3B | 1,920 | 194 | ||
| $37.6B | 1,844 | 190 | ||
| $36.0B | 1,824 | 186 | ||
| $33.2B | 1,801 | 181 | ||
| $34.4B | 1,816 | 182 | ||
| $34.1B | 1,821 | 174 |
The table scrolls sideways; the first column stays in place.
What do these figures leave out, and where are they from?Limits and source
What this number cannot tell you
- A manager reports the value of its holdings on the last day of a quarter, within 45 days after it. A report that the manager amended is shown with the amendments applied.
- Values are as filed, in dollars. A manager that files a combination report includes the holdings of the managers it names, so the same holding can be in two reports.
- Only holdings that Form 13F covers are reported: US exchange-traded stocks and some funds, options and convertible bonds. Cash, most bonds and holdings abroad are not in a report.
- The table lists a position once for each security, class, and put or call: the lines of the manager's table are summed. A line for a put or call states the value of the shares the option covers, not what the option costs or is worth.
- A share is the value of a position as a part of the value of all the lines of the manager's table.
- Where a name as filed includes the trademarked name of a stock index, the page shows [index name] in its place.
- A position is new when the manager's table for the quarter before has no line for the security, and sold out when its table for this quarter has none. It says nothing about when a position was bought or sold: only the quarter ends are compared.
- A manager can ask the SEC to keep some of its holdings confidential for a time; those holdings are missing from its report until it discloses them.
Observed .
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