WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in ALSN — Allison Transmission Holdings Inc
CIK 1644956
CHICAGO, IL
Position in ALSN
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$535,064
-$18,161 QoQ
Shares Held
4,746
+0.4% QoQ
Ownership
0.006%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#329
of 568 holders
Holding Since
Sep 2024
8 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 Jun 30, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $632,812,810 across 7 Auto Parts names. ALSN ranks #7 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BWA |
Borgwarner Inc
|
3,784,707 | $251,304,544 | |
| 2 | ORLY |
O Reilly Automotive Inc
|
1,855,002 | $170,827,134 | |
| 3 | GTX |
Garrett Motion Inc.
|
3,232,883 | $117,127,351 | |
| 4 | MOD |
Modine Manufacturing Co
|
213,929 | $57,123,321 | |
| 5 | ATMU |
Atmus Filtration Technologies Inc.
|
405,168 | $20,659,516 | |
| 6 | XPEL |
XPEL, Inc.
|
307,175 | $15,235,880 | |
| 7 | ALSN |
Allison Transmission Holdings Inc
This page
|
4,746 | $535,064 |
All Filings in ALSN
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $535,064 | 4,746 | Shares | Sole | 2026-08-12 | |
| 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. | ||||||