Allison Transmission Holdings, Inc.
US ˙ NYSE ˙ US01973R1014

SecurityALSN / Allison Transmission Holdings, Inc.
InstitutionRobotti Robert
Latest Disclosed Ownership58,384 shares
Latest Disclosed Value $ 6,834,431
Robotti Robert reports 0.44% decrease in ownership of ALSN / Allison Transmission Holdings, Inc.

On May 13, 2026 - Robotti Robert filed a 13F-HR form disclosing ownership of 58,384 shares of Allison Transmission Holdings, Inc. (US:ALSN) valued at $6,834,431 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 18, 2026 disclosing 58,644 shares of Allison Transmission Holdings, Inc.. This represents a change in shares of -0.44% during the quarter. The current value of the position is $6,911,498 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)
2026-05-13 2026-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,384 -260 -0.44 6,834 19.04 1.0658
2026-02-18 2025-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS COM 01973R101 58,644 685 1.18 5,741 16.71 1.0311
2026-02-12 2025-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,644 685 5,741 0.8080
2025-11-12 2025-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 57,959 -386 -0.66 4,920 -11.24 0.8535
2025-08-13 2025-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,345 -798 -1.35 5,542 -2.05 0.9314
2025-05-13 2025-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,143 -610 -1.02 5,658 -12.36 1.1338
2025-02-12 2024-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,753 30 0.05 6,457 12.53 1.1333
2024-11-14 2024-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,723 -490 -0.81 5,738 25.54 0.8733
2024-08-14 2024-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 60,213 220 0.37 4,570 -6.14 0.7159
2024-05-15 2024-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,993 485 0.82 4,869 40.72 0.6607
2024-02-14 2023-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,508 -730 -1.21 3,460 -2.73 0.4982
2023-11-14 2023-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 60,238 -635 -1.04 3,558 3.52 0.5225
2023-08-14 2023-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 60,873 -390 -0.64 3,437 24.00 0.5549
2023-05-12 2023-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 61,263 1,944 3.28 2,772 12.32 0.4881
2023-03-03 2022-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS COM 01973R101 59,319 -340 -0.57 2,468 22.49 0.4919
2023-02-14 2022-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,319 -340 2,468 0.2338
2022-11-14 2022-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,659 219 0.37 2,014 -11.86 0.4785
2022-08-12 2022-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,440 450 0.76 2,285 -1.34 0.5589
2022-05-16 2022-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,990 1,010 1.74 2,316 9.87 0.4687
2022-02-14 2021-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 57,980 0 0.00 2,108 2.93 0.4272
2021-11-15 2021-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 57,980 0 0.00 2,048 -11.11 0.4699
2021-08-16 2021-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 57,980 -230 -0.40 2,304 -3.07 0.5783
2021-05-17 2021-03-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,210 -700 -1.19 2,377 -6.45 0.5998
2021-02-16 2020-12-31 13F ALLISON TRANSMISSION HLDGS COM 01973R101 58,910 -300 -0.51 2,541 22.10 0.7415
2020-11-16 2020-09-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 59,210 -2,960 -4.76 2,081 -9.01 0.8029
2020-08-14 2020-06-30 13F ALLISON TRANSMISSION HLDGS COM 01973R101 62,170 62,170 2,287 0.9845
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.