Booz Allen Hamilton Holding Corporation
MX ˙ BMV ˙ US0995021062
SecurityMX:BAH / Booz Allen Hamilton Holding Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership59,733 shares
Latest Disclosed Value $ 4,661,245
Janus Henderson Group Plc reports 56.06% increase in ownership of BAH / Booz Allen Hamilton Holding Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 59,733 shares of Booz Allen Hamilton Holding Corporation (MX:BAH) valued at $4,661,245 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 38,276 shares of Booz Allen Hamilton Holding Corporation. This represents a change in shares of 56.06% during the quarter.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-18 2026-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 59,733 21,457 56.06 4,661 44.35 0.0008
2026-05-15 2026-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 59,733 21,457 56.06 4,661 44.35 0.0009
2026-02-17 2025-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 38,276 -1,314,270 -97.17 3,230 -97.61 0.0014
2025-11-14 2025-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,352,546 5,143 0.38 135,196 -3.64 0.0617
2025-08-14 2025-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,347,403 -1,081,675 -44.53 140,310 -45.14 0.0688
2025-05-15 2025-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,429,078 661,949 37.46 255,740 12.45 0.1402
2025-02-14 2024-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,767,129 1,135,426 179.74 227,425 121.21 0.1156
2024-11-14 2024-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 631,703 146,420 30.17 102,809 37.66 0.0526
2024-08-14 2024-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 485,283 43,696 9.90 74,683 13.93 0.0400
2024-05-15 2024-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 441,587 92,122 26.36 65,550 46.65 0.0358
2024-02-14 2023-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 349,465 45,274 14.88 44,700 34.48 0.0267
2023-11-14 2023-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 304,191 -64,474 -17.49 33,239 -19.21 0.0218
2023-08-14 2023-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 368,665 -69,028 -15.77 41,143 1.42 0.0256
2023-05-15 2023-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 437,693 105,840 31.89 40,569 16.96 0.0267
2023-02-14 2022-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 331,853 51,906 18.54 34,686 34.16 0.0248
2023-01-13 2022-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 279,947 41 0.01 25,853 2.21 0.0194
2022-11-14 2022-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 279,947 41 25,853 0.0066
2022-08-15 2022-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 279,906 -27,694 -9.00 25,293 -6.39 0.0174
2022-05-16 2022-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 307,600 27 0.01 27,019 3.60 0.0130
2022-02-14 2021-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 307,573 -6,343 -2.02 26,079 4.70 0.0109
2021-11-16 2021-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 313,916 274,260 691.60 24,909 637.39 0.0109
2021-08-16 2021-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 39,656 -19,963 -33.48 3,378 -29.64 0.0014
2021-05-17 2021-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 59,619 -68,543 -53.48 4,801 -57.03 0.0022
2021-02-16 2020-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 128,162 34,548 36.90 11,173 43.83 0.0052
2020-11-16 2020-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 93,614 -31,650 -25.27 7,768 -20.28 0.0040
2020-08-14 2020-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 125,264 -206,697 -62.27 9,744 -57.24 0.0055
2020-05-14 2020-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 331,961 117,031 54.45 22,786 49.05 0.0157
2020-02-18 2019-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 214,930 -190,584 -47.00 15,288 -46.92 0.0078
2019-11-14 2019-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 405,514 24,273 6.37 28,800 14.10 0.0156
2019-07-31 2019-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 381,241 -20,134 -5.02 25,242 8.17 0.0137
2019-04-30 2019-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 401,375 -16,309 -3.90 23,336 23.96 0.0129
2019-02-06 2018-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 417,684 162,884 63.93 18,825 48.86 0.0120
2018-11-09 2018-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 254,800 65,000 34.25 12,646 52.36 0.0068
2018-08-10 2018-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 189,800 -46,200 -19.58 8,300 -9.17 0.0047
2018-05-14 2018-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 236,000 77,400 48.80 9,138 51.12 0.0054
2018-03-12 2017-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 158,600 114,200 257.21 6,047 264.28 0.0037
2018-02-09 2017-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 158,600 114,200 6,047
2017-11-14 2017-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 44,400 -195,100 -81.46 1,660 -78.70 0.0011
2017-08-17 2017-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 239,500 239,500 7,793 0.0053
2017-08-14 2017-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 239,500 239,500 7,793
2017-05-03 2017-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 0 -75,377 -100.00 0 -100.00
2017-01-30 2016-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 75,377 75,377 2,719 0.0201
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.