Allison Transmission Holdings, Inc.
US ˙ NYSE ˙ US01973R1014

SecurityALSN / Allison Transmission Holdings, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership659,023 shares
Latest Disclosed Value $ 77,145,452
Morgan Stanley reports 7.39% decrease in ownership of ALSN / Allison Transmission Holdings, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 659,023 shares of Allison Transmission Holdings, Inc. (US:ALSN) valued at $77,145,232 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 711,613 shares of Allison Transmission Holdings, Inc.. This represents a change in shares of -7.39% during the quarter. The current value of the position is $78,456,688 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)
2026-05-15 2026-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 659,023 -52,590 -7.39 77,145 10.73 0.0046
2026-05-27 2025-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 711,613 -109,016 -13.28 69,667 0.02 0.0042
2026-02-13 2025-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 711,613 -109,016 69,667 0.0042
2026-05-27 2025-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 820,629 5,674 0.70 69,655 -10.02 0.0042
2025-11-14 2025-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 820,629 5,674 69,655 0.0042
2025-08-15 2025-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 814,955 65,919 8.80 77,413 8.03 0.0050
2025-05-15 2025-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 749,036 -95,414 -11.30 71,660 -21.47 0.0051
2025-05-15 2024-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 844,450 93,789 12.49 91,251 26.53 0.0064
2025-02-14 2024-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 844,450 93,789 91,251 0.0064
2025-05-14 2024-09-30 13F/A-2 ALLISON TRANSMISSION HLDGS I COM 01973R101 750,661 -14,037 -1.84 72,116 24.25 0.0052
2025-02-14 2024-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 750,661 -14,037 72,116 0.0052
2024-11-14 2024-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 750,661 -14,037 72,116 0.0052
2025-05-14 2024-06-30 13F/A-2 ALLISON TRANSMISSION HLDGS I COM 01973R101 764,698 -220,218 -22.36 58,041 -27.39 0.0045
2024-10-17 2024-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 764,698 -220,218 58,041 0.0045
2024-08-14 2024-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 764,698 -220,218 58,041 0.0045
2024-10-17 2024-03-31 13F/A-2 ALLISON TRANSMISSION HLDGS I COM 01973R101 984,916 216,208 28.13 79,936 78.83 0.0064
2024-08-16 2024-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 984,916 216,208 79,936 0.0064
2024-05-15 2024-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 984,916 216,208 79,936 0.0064
2024-08-16 2023-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 768,708 -78,889 -9.31 44,700 -10.71 0.0039
2024-02-13 2023-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 768,708 -78,889 44,700 0.0039
2023-11-15 2023-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 847,597 49,615 6.22 50,059 11.11 0.0051
2023-08-14 2023-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 797,982 158,230 24.73 45,054 55.67 0.0044
2023-05-15 2023-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 639,752 -50,266 -7.28 28,942 0.83 0.0031
2023-02-14 2022-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 690,018 183,680 36.28 28,705 67.92 0.0033
2022-11-14 2022-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 506,338 -242,288 -32.36 17,094 -40.61 0.0023
2022-10-27 2022-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 748,626 478,691 177.34 28,784 171.60 0.0037
2022-08-15 2022-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 748,626 478,691 28,784 0.0037
2022-10-27 2022-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 269,935 -104,409 -27.89 10,598 -22.12 0.0014
2022-05-13 2022-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 269,935 -104,409 10,598 0.0014
2022-02-14 2021-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 374,344 115,115 44.41 13,608 48.62 0.0017
2021-11-15 2021-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 259,229 58,161 28.93 9,156 14.58 0.0012
2021-08-23 2021-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 201,068 -73,837 -26.86 7,991 -28.80 0.0011
2021-08-16 2021-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 201,068 -73,837 7,991 0.0002
2021-05-17 2021-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 274,905 90,368 48.97 11,224 41.04 0.0016
2021-02-16 2020-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 184,537 43,897 31.21 7,958 61.03 0.0012
2020-11-13 2020-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 140,640 4,851 3.57 4,942 -1.04 0.0010
2020-08-14 2020-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 135,789 5,130 3.93 4,994 17.20 0.0011
2020-05-26 2020-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 130,659 -369 -0.28 4,261 -32.70 0.0012
2020-05-15 2020-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 130,659 -369 4,261 327.3336
2020-02-14 2019-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 131,028 3,084 2.41 6,331 5.17 0.0015
2019-11-14 2019-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 127,944 -49,526 -27.91 6,020 -26.82 0.0016
2019-08-14 2019-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 177,470 -725,194 -80.34 8,226 -79.71 0.0022
2019-05-15 2019-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 902,664 685,377 315.42 40,548 325.03 0.0115
2019-02-14 2018-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 217,287 20,428 10.38 9,540 -6.82 0.0029
2019-04-23 2018-09-30 13F/A-2 ALLISON TRANSMISSION HLDGS I COM 01973R101 196,859 -267,206 -57.58 10,238 -45.51 0.0026
2018-11-20 2018-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 196,859 0 10,238 0.0026
2018-11-14 2018-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 196,859 -267,206 10,238
2019-04-23 2018-06-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 464,065 -447,234 -49.08 18,790 -47.21 0.0051
2018-08-14 2018-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 464,065 -447,234 18,790
2019-04-23 2018-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 911,299 -924,932 -50.37 35,594 -54.99 0.0099
2018-05-14 2018-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 911,299 -924,932 35,594
2019-04-23 2017-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 1,836,231 -114,589 -5.87 79,087 8.02 0.0216
2018-02-14 2017-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,836,231 -114,589 79,087
2017-11-14 2017-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,950,820 1,348,663 223.97 73,215 224.15 0.0219
2017-08-11 2017-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 602,157 -107,173 -15.11 22,587 -11.70 0.0068
2017-05-22 2017-03-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 709,330 -306,682 -30.18 25,579 -25.27 0.0079
2017-05-12 2017-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 709,330 25,579
2017-02-22 2016-12-31 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 1,016,012 -186,554 -15.51 34,230 -0.75 0.0112
2017-02-13 2016-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,016,012 34,230
2016-11-10 2016-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,202,566 425,012 54.66 34,488 57.11 0.0118
2016-08-12 2016-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 777,554 65,812 9.25 21,951 14.30 0.0079
2016-05-12 2016-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 711,742 -108,287 -13.21 19,204 -9.55 0.0074
2016-02-09 2015-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 820,029 38,293 4.90 21,231 1.75 0.0077
2016-02-08 2015-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 781,736 -246,838 -24.00 20,865 -30.67 0.0077
2015-11-09 2015-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 781,736 20,865
2015-08-12 2015-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,028,574 -24,251 -2.30 30,096 -10.50 0.0104
2015-05-14 2015-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,052,825 -534,597 -33.68 33,627 -37.51 0.0124
2015-02-13 2014-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,587,422 173,482 12.27 53,813 33.58 0.0197
2014-12-16 2014-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 1,413,940 459,153 48.09 40,284 35.66 0.0155
2014-11-14 2014-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 1,413,940 40,284
2014-08-12 2014-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 954,787 157,359 19.73 29,695 24.38 0.0508
2014-05-13 2014-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 797,428 211,589 36.12 23,875 47.60 0.0100
2014-02-13 2013-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 585,839 10,050 1.75 16,175 12.14 0.0069
2013-11-13 2013-09-30 13F ALLISON TRANSMISSION HOLDIN COM 01973R101 575,789 116,387 25.33 14,424 36.02 0.0068
2013-08-08 2013-06-30 13F ALLISON TRANSMISSION HOLDIN COM 01973R101 459,402 459,402 10,604 0.0053
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.