Position in CALX
as of Mar 31, 2026
· filed May 11, 2026
Position Value
$75,743,487
+$15,123,182 QoQ
Shares Held
1,546,101
+35.0% QoQ
Ownership
2.46%
of shares outstanding
% of Portfolio
0.32%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2023
8 quarters on record
Voting authority
Sole 95%
Shared 0%
None 5%
Common Shares in CALX Over Time
Shares Held
Position Value (USD)
Position in Software - Infrastructure
Technology · as of Mar 31, 2026WESTFIELD CAPITAL MANAGEMENT CO LP holds $1,510,266,224 across 13 Software - Infrastructure names. CALX ranks #7 (5.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MSFT |
Microsoft Corp
|
1,649,513 | $610,600,227 | |
| 2 | IOT |
Samsara Inc.
|
5,072,821 | $160,757,697 | |
| 3 | NET |
Cloudflare, Inc.
|
541,566 | $111,746,728 | |
| 4 | PANW |
Palo Alto Networks Inc
|
636,483 | $102,040,954 | |
| 5 | PLTR |
Palantir Technologies Inc.
|
674,557 | $98,674,197 | |
| 6 | FFIV |
F5, Inc.
|
298,542 | $86,377,156 | |
| 7 | CALX |
Calix, Inc
This page
|
1,546,101 | $75,743,487 | |
| 8 | ZS |
Zscaler, Inc.
|
427,919 | $60,032,756 |
All Filings in CALX
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $75,743,487 | 1,546,101 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $60,620,305 | 1,145,292 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $41,982,971 | 684,096 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $15,486,215 | 291,149 | Shares | Sole | 2025-08-12 | |
| 2024-03-31 | $19,384,540 | 584,576 | Shares | Sole | 2024-05-10 | |
| 2023-12-31 | $29,779,977 | 681,620 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $31,133,932 | 679,187 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $26,522,273 | 531,402 | Shares | Sole | 2023-08-11 | |
| No filing history on record for this holder in this stock. | ||||||