WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in ALSN — Allison Transmission Holdings Inc
CIK 1644956
CHICAGO, IL
Position in ALSN
as of Mar 31, 2026
· filed May 8, 2026
Position Value
$553,225
+$102,200 QoQ
Shares Held
4,726
+2.6% QoQ
Ownership
0.006%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
7 quarters on record
Voting authority
Sole 67%
Shared 0%
None 33%
Common Shares in ALSN Over Time
Shares Held
Position Value (USD)
Position in Auto Parts
Consumer Cyclical · as of Mar 31, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $542,681,839 across 6 Auto Parts names. ALSN ranks #6 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ORLY |
O Reilly Automotive Inc
|
2,210,034 | $204,008,238 | |
| 2 | BWA |
Borgwarner Inc
|
2,884,062 | $156,489,204 | |
| 3 | GTX |
Garrett Motion Inc.
|
5,762,697 | $104,708,204 | |
| 4 | MOD |
Modine Manufacturing Co
|
243,343 | $52,734,861 | |
| 5 | ATMU |
Atmus Filtration Technologies Inc.
|
426,072 | $24,188,107 | |
| 6 | ALSN |
Allison Transmission Holdings Inc
This page
|
4,726 | $553,225 |
All Filings in ALSN
Export CSV
7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $553,225 | 4,726 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $451,025 | 4,607 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $423,551 | 4,990 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $490,338 | 5,162 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $501,597 | 5,243 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $405,333 | 3,751 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $450,568 | 4,690 | Shares | Sole | 2024-11-08 | |
| No filing history on record for this holder in this stock. | ||||||