Seven selected U.S. public companies and their mapped common-equity classes; reporting managers and quarter coverage come from the frozen Quarterly Holdings collection. Not a market-wide ownership map or a measure of operating control.
Berkshire Hathaway, JPMorgan Chase and Pershing Square Capital Management selected by exact SEC CIK. Complete as-filed tables for these managers in two publication windows; not all managers, assets or trading activity. Notices remain notices and do not become empty portfolios.
Holdings captured 2026-09-17T00:06:56.176Z. Company metadata captured through 2026-09-17T00:54:57.162Z.
Catalog 2026h1-v1, reviewed 2026-09-16. Classifications
are held fixed for both quarters; changes in the catalog are not investment changes.
Only mapped common-equity CUSIPs with share units are included. Options, principal amounts
and unmapped classes are excluded. Dollar values can be added across a company’s mapped
classes, but share quantities and voting rights are not combined. Missing reports and
out-of-date mappings are unavailable, never zero.
The map counts selected companies by current captured business-address state. These are
state-label anchors, not investment destinations or exact office coordinates.
A curated subset of cloud providers named in Backblaze's March 2026 quarterly report: Google Cloud, AWS and Azure. These are multi-business public companies; their common shares are not pure cloud-segment investments. This grouping is not a formal market definition or an exhaustive competitor list, and is applied consistently to both collected quarters.
Part II, Item 1A: Risks Related to Our Business and Industry — competition
Amazon.com, Inc. through Amazon Web Services, Alphabet Inc. through Google Cloud Platform, and Microsoft Corporation through Azure
Each connection counts managers with a positive reported position in both companies. The
trend uses only managers with usable reports in both quarters.
AlphabetAmazon
2026 Q11
→
2026 Q21
shared reporting managers in a consistent group of 2
Excluded because one or more company/quarter records are unavailable: Pershing Square Capital Management, L.P..
Without holding the group constant, observed shared counts are 2 → 1. A coverage change is
not proof of an investment change. Even usable public reports can omit
confidential or small holdings.
AlphabetMicrosoft
2026 Q11
→
2026 Q21
shared reporting managers in a consistent group of 2
Excluded because one or more company/quarter records are unavailable: Pershing Square Capital Management, L.P..
Without holding the group constant, observed shared counts are 2 → 1. A coverage change is
not proof of an investment change. Even usable public reports can omit
confidential or small holdings.
Open a connection
For each manager, compare the focal company with every peer. Select a quarter badge to
inspect its source rows.
● Positive position○ Not listed / zero reported— Unavailable
Berkshire Hathaway Inc
Reporting-manager CIK 0001067983
Alphabet
Amazon
Microsoft
JPMORGAN CHASE & CO
Reporting-manager CIK 0000019617
Alphabet
Amazon
Microsoft
Pershing Square Capital Management, L.P.
Reporting-manager CIK 0001336528
Alphabet
Amazon
Microsoft
Company identity & security matching
Alphabet Inc. · SEC SIC 7370: Services-Computer Programming, Data Processing, Etc.
Class A · CUSIP 02079K305 Curated match applies 2026-03-31 through 2026-06-30. The issuer CIK and CUSIP are verified in Schedule 13G identity fields ↗ (event 2026-03-31).
Class C · CUSIP 02079K107 Curated match applies 2026-03-31 through 2026-06-30. The issuer CIK and CUSIP are verified in Schedule 13G identity fields ↗ (event 2026-03-31).
Schedule 13G is used only to verify identity here. All displayed investment amounts and
manager relationships come from the frozen Form 13F collection. Matching is not based on
similar company names.