Booz Allen Hamilton Holding Corporation
MX ˙ BMV ˙ US0995021062
SecurityMX:BAH / Booz Allen Hamilton Holding Corporation
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership1,986,633 shares
Latest Disclosed Value $ 155,016,973
Robeco Institutional Asset Management B.V. reports 23,795.03% increase in ownership of BAH / Booz Allen Hamilton Holding Corporation

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 1,986,633 shares of Booz Allen Hamilton Holding Corporation (MX:BAH) valued at $155,016,973 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 8,314 shares of Booz Allen Hamilton Holding Corporation. This represents a change in shares of 23,795.03% 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.

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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)
2026-04-21 2026-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,986,633 1,978,319 23,795.03 155,017 22,013.55 0.2209
2026-01-23 2025-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 8,314 -1,300 -13.52 701 -26.98 0.0010
2025-10-22 2025-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 9,614 -212 -2.16 961 -6.16 0.0014
2025-07-18 2025-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 9,826 -116,266 -92.21 1,023 -92.24 0.0017
2025-04-23 2025-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 126,092 -20,744 -14.13 13,187 -30.22 0.0256
2025-01-23 2024-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 146,836 132,250 906.69 18,898 696.00 0.0358
2024-10-29 2024-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 14,586 -122,410 -89.35 2,374 -88.74 0.0047
2024-07-23 2024-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 136,996 -118,456 -46.37 21,084 -44.40 0.0454
2024-04-24 2024-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 255,452 41,320 19.30 37,919 38.45 0.0824
2024-02-14 2023-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 214,132 -7,670 -3.46 27,390 13.01 0.0664
2024-02-08 2023-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 138,034 -83,768 214 0.0401
2023-10-24 2023-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 221,802 5,543 2.56 24,236 0.42 0.0648
2023-07-24 2023-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 216,259 -103,549 -32.38 24,135 -18.58 0.0633
2023-05-04 2023-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 319,808 4,055 1.28 29,643 -10.18 0.0808
2023-02-07 2022-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 315,753 263,080 499.46 33,003 578.63 0.0951
2022-12-01 2022-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 52,673 9,946 23.28 4,863 26.02 0.0157
2022-10-27 2022-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 52,673 9,946 4,863 0.0155
2022-12-01 2022-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 42,727 10,813 33.88 3,859 37.62 0.0120
2022-07-27 2022-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 42,727 10,813 3,859 0.0118
2022-12-01 2022-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 31,914 -38,002 -54.35 2,804 -52.71 0.0066
2022-04-26 2022-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 31,914 -38,002 2,804 0.0065
2022-12-01 2021-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 69,916 -6,711 -8.76 5,929 -2.50 0.0126
2022-01-31 2021-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 69,916 -6,711 5,929 0.0125
2022-12-01 2021-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 76,627 -51,294 -40.10 6,081 -44.20 0.0135
2021-10-20 2021-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 76,627 -51,294 6,081 0.0133
2022-12-01 2021-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 127,921 -370,760 -74.35 10,898 -72.86 0.0242
2021-07-28 2021-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 127,921 -370,760 10,898 0.0238
2022-12-01 2021-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 498,681 -457,633 -47.85 40,158 -51.83 0.0990
2021-04-23 2021-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 498,681 -457,633 40,158 0.0976
2022-12-01 2020-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 956,314 -36,660 -3.69 83,373 1.19 0.2191
2021-01-28 2020-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 956,314 -36,660 83,373 0.2164
2021-01-19 2020-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 992,974 -108,078 -9.82 82,395 -3.80 0.2547
2020-10-29 2020-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 992,974 -108,078 82,395 254,462.5762
2021-01-19 2020-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,101,052 -121,042 -9.90 85,651 2.11 0.2909
2020-07-20 2020-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,101,052 -121,042 85,651 290,629.1204
2021-01-19 2020-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,222,094 -18,479 -1.49 83,885 -4.94 0.3365
2020-04-30 2020-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,222,094 -18,479 83,885 336,229.9978
2021-01-19 2019-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,240,573 6,988 0.57 88,241 0.72 0.2825
2020-02-06 2019-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,240,573 6,988 88,241 282,232.0528
2021-01-19 2019-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,233,585 6,162 0.50 87,608 7.80 0.3093
2019-10-17 2019-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,233,585 6,162 87,608 308,854.2290
2021-01-19 2019-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,227,423 -18,668 -1.50 81,267 12.18 0.2870
2019-07-19 2019-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,227,423 -18,668 81,267 286,568.6989
2021-01-19 2019-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,246,091 412,017 49.40 72,446 92.72 0.2664
2019-05-02 2019-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 1,246,091 412,017 72,446 265,995.9405
2021-01-19 2018-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 834,074 831,934 38,875.42 37,591 35,363.21 0.1688
2019-02-08 2018-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 834,074 831,934 37,591 168,499.7947
2021-01-19 2018-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 0.00 106 12.77 0.0004
2018-10-25 2018-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 106
2021-01-19 2018-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 0.00 94 14.63 0.0004
2018-08-03 2018-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 94
2021-01-19 2018-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 0.00 82 0.00 0.0004
2018-05-07 2018-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 82 383.4756
2021-01-19 2017-12-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 0.00 82 2.50 0.0004
2018-01-25 2017-12-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 0 82 424.0905
2021-01-19 2017-09-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 -14,428 -87.08 80 -85.16 0.0005
2017-10-17 2017-09-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 2,140 -14,428 80 495.6281
2021-01-19 2017-06-30 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 16,568 0 0.00 539 -8.18 0.0035
2017-08-07 2017-06-30 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 16,568 0 539 3,509.3241
2021-01-19 2017-03-31 13F/A-1 BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 16,568 16,568 587 0.0039
2017-05-15 2017-03-31 13F BOOZ ALLEN HAMILTON HLDG COR CL A 099502106 16,568 587
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.