Allison Transmission Holdings, Inc.
US ˙ NYSE ˙ US01973R1014

SecurityALSN / Allison Transmission Holdings, Inc.
InstitutionCwm, Llc
Latest Disclosed Ownership29,143 shares
Latest Disclosed Value $ 3,411,514
Cwm, Llc reports 0.26% increase in ownership of ALSN / Allison Transmission Holdings, Inc.

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 29,143 shares of Allison Transmission Holdings, Inc. (US:ALSN) valued at $3,411,480 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 29,068 shares of Allison Transmission Holdings, Inc.. This represents a change in shares of 0.26% during the quarter. The current value of the position is $3,449,948 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 29,143 75 0.26 3,412 170,450.00 0.0089
2026-01-26 2025-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 29,068 4,986 20.70 3 0.00 0.0077
2025-10-15 2025-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 24,082 -1,798 -6.95 2 0.00 0.0061
2025-07-25 2025-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 25,880 13,115 102.74 2 100.00 0.0087
2025-05-01 2025-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 12,765 1,590 14.23 1 0.00 0.0049
2025-02-04 2024-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 11,175 524 4.92 1 0.00 0.0050
2024-10-08 2024-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 10,651 4,642 77.25 1 0.0044
2024-07-10 2024-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 6,009 3,379 128.48 0 0.0021
2024-04-05 2024-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 2,630 1,018 63.15 0 0.0010
2024-02-01 2023-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,612 -402 -19.96 0 0.0005
2023-10-11 2023-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 2,014 1,197 146.51 0 0.0007
2023-08-03 2023-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 817 438 115.57 0 0.0003
2023-05-01 2023-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 379 379 0 0.0001
2023-02-01 2022-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 0 -50 -100.00 0 -100.00
2022-10-27 2022-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 50 -211 -80.84 2 -80.00 0.0000
2022-07-28 2022-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 261 -157 -37.56 10 -37.50 0.0001
2022-04-21 2022-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 418 158 60.77 16 77.78 0.0001
2022-01-31 2021-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 260 -86 -24.86 9 -35.71 0.0001
2021-09-15 2021-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2021-07-29 2021-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 14 0.0001
2021-09-15 2021-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2021-04-27 2021-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 214 -132 9 0.0001
2021-09-15 2020-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2021-01-27 2020-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 214 -132 9 0.0001
2021-09-15 2020-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2020-10-19 2020-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 214 -132 8 0.0001
2021-09-15 2020-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2020-07-22 2020-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 177 -169 7 0.0001
2021-09-15 2020-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2020-04-28 2020-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 177 -169 6 0.0001
2021-09-14 2019-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2020-01-27 2019-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 177 -169 9 0.0001
2021-09-14 2019-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2019-10-22 2019-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 177 -169 8 0.0001
2021-09-14 2019-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 0 0.00 14 0.00 0.0001
2021-09-02 2019-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 346 346 14 0.0001
2018-04-26 2018-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 0 -160 -100.00 0 -100.00
2018-01-16 2017-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 160 0 0.00 7 16.67 0.0003
2017-10-16 2017-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 160 0 0.00 6 0.00 0.0003
2017-07-17 2017-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 160 0 0.00 6 0.00 0.0003
2017-04-17 2017-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 160 0 0.00 6 20.00 0.0003
2017-01-19 2016-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 160 -10 -5.88 5 0.00 0.0003
2016-10-17 2016-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 170 170 5 0.0003
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.