Leidos Holdings, Inc.
US ˙ NYSE ˙ US5253271028

SecurityLDOS / Leidos Holdings, Inc.
InstitutionBoston Partners
Latest Disclosed Ownership2,454,639 shares
Latest Disclosed Value $ 382,061,748
Boston Partners reports 12.88% decrease in ownership of LDOS / Leidos Holdings, Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 2,454,639 shares of Leidos Holdings, Inc. (US:LDOS) valued at $381,745,457 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 2,817,422 shares of Leidos Holdings, Inc.. This represents a change in shares of -12.88% during the quarter. The current value of the position is $305,234,360 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 LEIDOS HOLDINGS COM 525327102 2,454,639 -362,783 -12.88 382,062 -25.03 0.1710
2026-02-13 2025-12-31 13F LEIDOS HOLDINGS COM 525327102 2,817,422 -74,665 -2.58 509,612 -6.88 0.5276
2025-11-13 2025-09-30 13F LEIDOS HOLDINGS COM 525327102 2,892,087 -17,055 -0.59 547,271 18.92 0.5619
2025-08-12 2025-06-30 13F/A-1 LEIDOS HOLDINGS COM 525327102 2,909,142 103,321 3.68 460,203 21.42 0.5111
2025-08-07 2025-06-30 13F LEIDOS HOLDINGS COM 525327102 2,905,936 100,115 459,697 0.2111
2025-05-13 2025-03-31 13F LEIDOS HOLDINGS COM 525327102 2,805,821 -366,383 -11.55 379,029 -17.46 0.4584
2025-02-11 2024-12-31 13F LEIDOS HOLDINGS COM 525327102 3,172,204 -788,847 -19.92 459,194 -28.98 0.5585
2024-11-12 2024-09-30 13F LEIDOS HOLDINGS COM 525327102 3,961,051 -29,229 -0.73 646,531 10.97 0.7630
2024-08-14 2024-06-30 13F LEIDOS HOLDINGS COM 525327102 3,990,280 560,016 16.33 582,615 29.59 0.7238
2024-05-28 2024-03-31 13F/A-1 LEIDOS HOLDINGS COM 525327102 3,430,264 188,458 5.81 449,592 28.01 0.5355
2024-05-13 2024-03-31 13F LEIDOS HOLDINGS COM 525327102 3,430,264 188,458 449,592 0.2225
2024-02-07 2023-12-31 13F LEIDOS HOLDINGS COM 525327102 3,241,806 -339,162 -9.47 351,220 6.08 0.4652
2023-11-08 2023-09-30 13F LEIDOS HOLDINGS COM 525327102 3,580,968 -385,253 -9.71 331,102 -6.01 0.4584
2023-08-10 2023-06-30 13F LEIDOS HOLDINGS COM 525327102 3,966,221 -423,365 -9.64 352,278 -12.89 0.4742
2023-05-09 2023-03-31 13F LEIDOS HOLDINGS COM 525327102 4,389,586 273,165 6.64 404,419 -6.39 0.5560
2023-02-08 2022-12-31 13F LEIDOS HOLDINGS COM 525327102 4,116,421 -20,774 -0.50 432,023 18.67 0.5844
2022-11-09 2022-09-30 13F LEIDOS HOLDINGS COM 525327102 4,137,195 103,470 2.57 364,047 -10.49 0.5328
2022-08-10 2022-06-30 13F LEIDOS HOLDINGS COM 525327102 4,033,725 -336,271 -7.69 406,729 -13.84 0.5684
2022-05-10 2022-03-31 13F LEIDOS HOLDINGS COM 525327102 4,369,996 1,814,223 70.99 472,051 107.75 0.5718
2022-02-04 2021-12-31 13F LEIDOS HOLDINGS COM 525327102 2,555,773 -48,727 -1.87 227,224 -9.25 0.2737
2021-11-05 2021-09-30 13F LEIDOS HOLDINGS COM 525327102 2,604,500 76,686 3.03 250,381 -2.04 0.3172
2021-08-12 2021-06-30 13F LEIDOS HOLDINGS COM 525327102 2,527,814 29,427 1.18 255,584 6.24 0.3259
2021-05-10 2021-03-31 13F LEIDOS HOLDINGS COM 525327102 2,498,387 221,781 9.74 240,582 0.53 0.3226
2021-02-10 2020-12-31 13F/A-1 LEIDOS HOLDINGS COM 525327102 2,276,606 4,463 0.20 239,317 18.15 0.3722
2021-02-04 2020-12-31 13F LEIDOS HOLDINGS COM 525327102 2,276,606 4,463 239,317 143,575.9754
2020-11-13 2020-09-30 13F/A-1 LEIDOS HOLDINGS COM 525327102 2,272,143 2,631 0.12 202,561 -4.71 0.3688
2020-11-09 2020-09-30 13F LEIDOS HOLDINGS COM 525327102 2,269,512 0 212,584 156,061.9795
2020-08-12 2020-06-30 13F LEIDOS HOLDINGS COM 525327102 2,269,512 -667,431 -22.73 212,584 -21.00 0.3905
2020-05-13 2020-03-31 13F LEIDOS HOLDINGS COM 525327102 2,936,943 321,843 12.31 269,096 5.12 0.5344
2020-02-06 2019-12-31 13F/A-1 LEIDOS HLDGS COM 525327102 2,615,100 30,017 1.16 256,000 15.31 0.3386
2020-02-05 2019-12-31 13F LEIDOS HLDGS COM 525327102 2,615,100 30,017 256,000 143,930.6770
2019-11-20 2019-09-30 13F/A-1 LEIDOS HLDGS COM 525327102 2,585,083 -637,148 -19.77 222,001 -13.73 0.3006
2019-11-08 2019-09-30 13F LEIDOS HLDGS COM 525327102 3,220,034 -2,197 257,174 0.3401
2019-08-26 2019-06-30 13F/A-1 LEIDOS HLDGS COM 525327102 3,222,231 -661,178 -17.03 257,325 3.39 0.3375
2019-08-09 2019-06-30 13F LEIDOS HLDGS COM 525327102 3,222,318 -661,091 257,332
2019-05-13 2019-03-31 13F/A-1 LEIDOS HLDGS COM 525327102 3,883,409 -24,000 -0.61 248,888 20.82 0.3298
2019-05-03 2019-03-31 13F LEIDOS HLDGS COM 525327102 3,883,409 -24,000 248,888
2019-02-07 2018-12-31 13F LEIDOS HLDGS COM 525327102 3,907,409 26,292 0.68 205,999 -23.25 0.2960
2018-11-14 2018-09-30 13F LEIDOS HLDGS COM 525327102 3,881,117 -1,587,725 -29.03 268,418 -16.81 0.3119
2018-08-03 2018-06-30 13F LEIDOS HLDGS COM 525327102 5,468,842 687,970 14.39 322,662 3.20 0.3867
2018-05-04 2018-03-31 13F LEIDOS HLDGS COM 525327102 4,780,872 -247,150 -4.92 312,669 -3.69 0.3770
2018-02-14 2017-12-31 13F/A-1 LEIDOS HLDGS COM 525327102 5,028,022 85,324 1.73 324,659 10.92 0.3825
2018-02-01 2017-12-31 13F LEIDOS HLDGS COM 525327102 5,028,022 85,324 324,659
2017-11-02 2017-09-30 13F LEIDOS HLDGS COM 525327102 4,942,698 -509,912 -9.35 292,707 3.85 0.3617
2017-08-02 2017-06-30 13F LEIDOS HLDGS COM 525327102 5,452,610 -1,296,586 -19.21 281,846 -18.34 0.3584
2017-05-03 2017-03-31 13F LEIDOS HLDGS COM 525327102 6,749,196 364,578 5.71 345,155 5.71 0.4407
2017-02-06 2016-12-31 13F LEIDOS HLDGS COM 525327102 6,384,618 -1,021,832 -13.80 326,510 1.86 0.4293
2016-11-09 2016-09-30 13F LEIDOS HLDGS COM 525327102 7,406,450 7,406,450 320,551 0.4482
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.