WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in JBI — Janus International Group, Inc.
CIK 1644956
CHICAGO, IL
Position in JBI
as of Mar 31, 2026
· filed May 8, 2026
Position Value
$14,058,243
-$3,194,054 QoQ
Shares Held
2,729,756
+3.5% QoQ
Ownership
2.00%
of shares outstanding
% of Portfolio
0.05%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
7 quarters on record
Voting authority
Sole 69%
Shared 0%
None 31%
Common Shares in JBI Over Time
Shares Held
Position Value (USD)
All Filings in JBI
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $14,058,243 | 2,729,756 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $17,252,297 | 2,637,966 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $27,411,358 | 2,777,240 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $29,607,288 | 3,637,259 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $28,249,560 | 3,923,550 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $19,513,228 | 2,654,861 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $26,366,091 | 2,607,922 | Shares | Sole | 2024-11-08 | |
| No filing history on record for this holder in this stock. | ||||||