Allison Transmission Holdings, Inc.
US ˙ NYSE ˙ US01973R1014

SecurityALSN / Allison Transmission Holdings, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership48,108 shares
Latest Disclosed Value $ 5,631,523
Citigroup Inc reports 31.18% decrease in ownership of ALSN / Allison Transmission Holdings, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 48,108 shares of Allison Transmission Holdings, Inc. (US:ALSN) valued at $5,631,522 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 69,909 shares of Allison Transmission Holdings, Inc.. This represents a change in shares of -31.18% during the quarter. The current value of the position is $5,695,025 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)
2026-05-11 2026-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 48,108 -21,801 -31.18 5,632 -17.72 0.0012
2026-02-13 2025-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 69,909 3,532 5.32 6,844 21.48 0.0030
2025-11-10 2025-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 66,377 6,087 10.10 5,634 -1.61 0.0025
2025-08-11 2025-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 60,290 6,264 11.59 5,727 10.80 0.0028
2025-05-12 2025-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 54,026 7,417 15.91 5,169 2.62 0.0026
2025-02-12 2024-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 46,609 3,495 8.11 5,037 21.61 0.0030
2024-11-12 2024-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 43,114 1,733 4.19 4,142 31.88 0.0024
2024-08-12 2024-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 41,381 -8,426 -16.92 3,141 -22.32 0.0020
2024-05-10 2024-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 49,807 -21,531 -30.18 4,042 -2.56 0.0027
2024-02-09 2023-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 71,338 18,800 35.78 4,148 33.72 0.0029
2023-12-06 2023-09-30 13F/A-1 ALLISON TRANSMISSION HLDGS I COM 01973R101 52,538 -15,341 -22.60 3,103 -19.05 0.0023
2023-11-09 2023-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 52,538 -15,341 3,103 0.0009
2023-08-10 2023-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 67,879 32,924 94.19 3,832 142.38 0.0025
2023-05-11 2023-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 34,955 1,880 5.68 1,581 14.98 0.0011
2023-02-09 2022-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 33,075 -2,159 -6.13 1,376 15.64 0.0011
2022-11-10 2022-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 35,234 -950 -2.63 1,189 -14.52 0.0009
2022-08-10 2022-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 36,184 -38,671 -51.66 1,391 -52.65 0.0010
2022-05-12 2022-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 74,855 1,127 1.53 2,938 9.63 0.0018
2022-02-10 2021-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 73,728 -27,262 -26.99 2,680 -24.89 0.0014
2021-11-10 2021-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 100,990 55,882 123.88 3,568 99.00 0.0021
2021-08-10 2021-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 45,108 -54,629 -54.77 1,793 -55.98 0.0011
2021-05-13 2021-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 99,737 51,786 108.00 4,073 96.95 0.0026
2021-02-11 2020-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 47,951 -81,643 -63.00 2,068 -54.59 0.0012
2020-11-12 2020-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 129,594 -96,502 -42.68 4,554 -45.24 0.0030
2020-08-12 2020-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 226,096 -12,808 -5.36 8,316 6.75 0.0065
2020-05-12 2020-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 238,904 -119,971 -33.43 7,790 -55.08 0.0070
2020-02-12 2019-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 358,875 10,397 2.98 17,341 5.76 0.0126
2019-11-08 2019-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 348,478 42,358 13.84 16,397 15.56 0.0130
2019-08-12 2019-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 306,120 138,511 82.64 14,189 88.46 0.0115
2019-05-13 2019-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 167,609 9,316 5.89 7,529 8.32 0.0073
2019-02-12 2018-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 158,293 21,924 16.08 6,951 -1.99 0.0070
2018-11-13 2018-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 136,369 -101,710 -42.72 7,092 -26.43 0.0063
2018-08-10 2018-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 238,079 48,204 25.39 9,640 29.97 0.0089
2018-05-11 2018-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 189,875 128,834 211.06 7,417 182.12 0.0061
2018-02-12 2017-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 61,041 -33,518 -35.45 2,629 -25.92 0.0021
2017-11-13 2017-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 94,559 63,323 202.72 3,549 202.82 0.0029
2017-08-11 2017-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 31,236 -107,901 -77.55 1,172 -76.64 0.0011
2017-05-12 2017-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 139,137 -92,985 -40.06 5,017 -35.84 0.0045
2017-02-10 2016-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 232,122 1,524 0.66 7,820 18.25 0.0070
2016-11-10 2016-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 230,598 -48,623 -17.41 6,613 -16.11 0.0062
2016-08-12 2016-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 279,221 -4,344 -1.53 7,883 3.03 0.0080
2016-05-13 2016-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 283,565 82,254 40.86 7,651 46.82 0.0086
2016-02-12 2015-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 201,311 82,347 69.22 5,211 64.07 0.0052
2015-11-13 2015-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 118,964 100,635 549.05 3,176 493.64 0.0030
2015-08-13 2015-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 18,329 4,807 35.55 535 24.13 0.0005
2015-05-14 2015-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 13,522 -1,379 -9.25 431 -14.65 0.0004
2015-02-17 2014-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 14,901 -496 -3.22 505 15.03 0.0005
2014-11-14 2014-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 15,397 -294,248 -95.03 439 -95.44 0.0004
2014-08-14 2014-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 309,645 303,624 5,042.75 9,630 5,250.00 0.0092
2014-05-15 2014-03-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 6,021 -229 -3.66 180 4.05 0.0002
2014-02-14 2013-12-31 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 6,250 4,112 192.33 173 226.42 0.0002
2013-11-14 2013-09-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 2,138 -2,267 -51.46 53 -48.04 0.0000
2013-08-14 2013-06-30 13F ALLISON TRANSMISSION HLDGS I COM 01973R101 4,405 4,405 102 0.0001
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.