레이도스 홀딩스, Inc.
MX ˙ BMV ˙ US5253271028
SecurityMX:LDOS / Leidos Holdings, Inc.
InstitutionTower Bridge Advisors
Latest Disclosed Ownership20,226 shares
Latest Disclosed Value $ 3,145,548
Tower Bridge Advisors reports 0.70% increase in ownership of LDOS / Leidos Holdings, Inc.

On May 12, 2026 - Tower Bridge Advisors filed a 13F-HR form disclosing ownership of 20,226 shares of Leidos Holdings, Inc. (MX:LDOS) valued at $3,145,548 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 20,086 shares of Leidos Holdings, Inc.. This represents a change in shares of 0.70% 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)
2026-05-12 2026-03-31 13F Leidos Holdings Common 525327102 20,226 140 0.70 3,146 -13.19 0.2206
2026-02-13 2025-12-31 13F LEIDOS HLDGS COMMON 525327102 20,086 1,950 10.75 3,624 5.75 0.3659
2025-11-12 2025-09-30 13F LEIDOS HLDGS COMMON 525327102 18,136 -1 -0.01 3,427 19.75 0.3422
2025-08-11 2025-06-30 13F LEIDOS HLDGS COMMON 525327102 18,137 25 0.14 2,861 17.06 0.3076
2025-05-08 2025-03-31 13F LEIDOS HLDGS COMMON 525327102 18,112 -25 -0.14 2,444 -6.43 0.2731
2025-02-05 2024-12-31 13F LEIDOS HLDGS COMMON 525327102 18,137 -400 -2.16 2,613 -13.54 0.2782
2024-11-06 2024-09-30 13F LEIDOS HLDGS COMMON 525327102 18,537 0 0.00 3,022 11.72 0.3135
2024-07-24 2024-06-30 13F LEIDOS HLDGS COMMON 525327102 18,537 -2,650 -12.51 2,704 -2.63 0.3006
2024-04-29 2024-03-31 13F LEIDOS HLDGS COMMON 525327102 21,187 -9,475 -30.90 2,777 -16.31 0.2827
2024-02-14 2023-12-31 13F LEIDOS HLDGS COMMON 525327102 30,662 -950 -3.01 3,319 13.90 0.2855
2023-11-01 2023-09-30 13F LEIDOS HLDGS COMMON 525327102 31,612 0 0.00 2,913 4.15 0.2697
2023-07-20 2023-06-30 13F LEIDOS HOLDINGS COM 525327102 31,612 -4,634 -12.78 2,797 -16.16 0.2564
2023-04-26 2023-03-31 13F LEIDOS HLDGS COMMON 525327102 36,246 -1,950 -5.11 3,337 -16.95 0.2732
2023-01-27 2022-12-31 13F LEIDOS HLDGS COMMON 525327102 38,196 -375 -0.97 4,018 19.09 0.3337
2022-11-14 2022-09-30 13F LEIDOS HLDGS COMMON 525327102 38,571 -700 -1.78 3,374 -14.69 0.2998
2022-07-21 2022-06-30 13F LEIDOS HLDGS COMMON 525327102 39,271 450 1.16 3,955 -5.70 0.3226
2022-05-05 2022-03-31 13F LEIDOS HLDGS COMMON 525327102 38,821 -64,399 -62.39 4,193 -54.30 0.2803
2022-02-09 2021-12-31 13F LEIDOS HLDGS COMMON 525327102 103,220 -71,242 -40.84 9,176 -45.29 0.5634
2021-10-28 2021-09-30 13F LEIDOS HLDGS COMMON 525327102 174,462 -36,201 -17.18 16,771 -21.26 1.1188
2021-08-10 2021-06-30 13F LEIDOS HLDGS COMMON 525327102 210,663 -4,663 -2.17 21,298 2.74 1.4196
2021-05-12 2021-03-31 13F LEIDOS HLDGS COMMON 525327102 215,326 -2,123 -0.98 20,732 -9.31 1.5608
2021-02-11 2020-12-31 13F LEIDOS HLDGS COMMON 525327102 217,449 19,142 9.65 22,858 29.29 1.8617
2020-11-13 2020-09-30 13F LEIDOS HLDGS COMMON 525327102 198,307 523 0.26 17,679 -4.57 1.8062
2020-07-22 2020-06-30 13F LEIDOS HLDGS COMMON 525327102 197,784 -5,864 -2.88 18,526 -0.74 2.0773
2020-04-27 2020-03-31 13F LEIDOS HLDGS COMMON 525327102 203,648 803 0.40 18,664 -6.00 2.4499
2020-02-05 2019-12-31 13F LEIDOS HLDGS COMMON 525327102 202,845 3,118 1.56 19,856 14.01 2.0975
2019-11-12 2019-09-30 13F LEIDOS HLDGS COMMON 525327102 199,727 -1,065 -0.53 17,416 8.63 1.9069
2019-08-06 2019-06-30 13F LEIDOS HLDGS COMMON 525327102 200,792 2,234 1.13 16,033 26.00 1.7935
2019-04-30 2019-03-31 13F LEIDOS HLDGS COMMON 525327102 198,558 -8,062 -3.90 12,726 16.82 1.4771
2019-02-07 2018-12-31 13F LEIDOS HLDGS COMMON 525327102 206,620 -4,118 -1.95 10,893 -25.26 1.4033
2018-10-23 2018-09-30 13F LEIDOS HLDGS COMMON 525327102 210,738 2,792 1.34 14,575 18.80 1.5226
2018-08-09 2018-06-30 13F LEIDOS HLDGS COMMON 525327102 207,946 1,864 0.90 12,269 -8.97 1.3682
2018-05-02 2018-03-31 13F LEIDOS HLDGS COMMON 525327102 206,082 4,756 2.36 13,478 3.68 1.4944
2018-01-30 2017-12-31 13F LEIDOS HLDGS COMMON 525327102 201,326 3,538 1.79 13,000 10.98 1.3943
2017-11-06 2017-09-30 13F LEIDOS HLDGS COMMON 525327102 197,788 29,765 17.71 11,713 34.86 1.3311
2017-07-26 2017-06-30 13F LEIDOS HLDGS COMMON 525327102 168,023 15,783 10.37 8,685 11.56 0.9957
2017-05-02 2017-03-31 13F LEIDOS HLDGS INC COM COMMON 525327102 152,240 152,240 7,786 0.9090
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.