Lockheed Martin Corporation
MX ˙ BMV ˙ US5398301094
SecurityMX:LMT / Lockheed Martin Corporation
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership74,089 shares
Latest Disclosed Value $ 44,778,652
Robeco Institutional Asset Management B.V. reports 44.74% increase in ownership of LMT / Lockheed Martin Corporation

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 74,089 shares of Lockheed Martin Corporation (MX:LMT) valued at $44,778,652 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 51,189 shares of Lockheed Martin Corporation. This represents a change in shares of 44.74% 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 LOCKHEED MARTIN COM 539830109 74,089 22,900 44.74 44,779 80.86 0.0638
2026-01-23 2025-12-31 13F LOCKHEED MARTIN COM 539830109 51,189 26,067 103.76 24,759 97.42 0.0353
2025-10-22 2025-09-30 13F LOCKHEED MARTIN COM 539830109 25,122 -52,511 -67.64 12,541 -65.12 0.0182
2025-07-18 2025-06-30 13F LOCKHEED MARTIN COM 539830109 77,633 -8,133 -9.48 35,955 -6.15 0.0581
2025-04-23 2025-03-31 13F LOCKHEED MARTIN COM 539830109 85,766 386 0.45 38,313 -7.66 0.0744
2025-01-23 2024-12-31 13F LOCKHEED MARTIN COM 539830109 85,380 -5,416 -5.97 41,490 -21.83 0.0786
2024-10-29 2024-09-30 13F LOCKHEED MARTIN COM 539830109 90,796 -5,040 -5.26 53,076 18.57 0.1054
2024-07-23 2024-06-30 13F LOCKHEED MARTIN COM 539830109 95,836 -3,574 -3.60 44,765 -1.00 0.0963
2024-04-24 2024-03-31 13F LOCKHEED MARTIN COM 539830109 99,410 -658 -0.66 45,219 -0.30 0.0983
2024-02-14 2023-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 100,068 -14,906 -12.96 45,355 -3.54 0.1100
2024-02-08 2023-12-31 13F LOCKHEED MARTIN COM 539830109 67,740 -47,234 100 0.0187
2023-10-24 2023-09-30 13F LOCKHEED MARTIN COM 539830109 114,974 3,006 2.68 47,020 -8.78 0.1257
2023-07-24 2023-06-30 13F LOCKHEED MARTIN COM 539830109 111,968 -3,628 -3.14 51,548 -5.67 0.1351
2023-05-04 2023-03-31 13F LOCKHEED MARTIN COM 539830109 115,596 -7,188 -5.85 54,646 -8.52 0.1490
2023-02-07 2022-12-31 13F LOCKHEED MARTIN COM 539830109 122,784 -11,791 -8.76 59,733 14.91 0.1721
2022-12-01 2022-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 134,575 -13,239 -8.96 51,983 -18.21 0.1680
2022-10-27 2022-09-30 13F LOCKHEED MARTIN COM 539830109 134,575 -13,239 51,983 0.1657
2022-12-01 2022-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 147,814 15,236 11.49 63,557 8.61 0.1975
2022-07-27 2022-06-30 13F LOCKHEED MARTIN COM 539830109 147,814 15,236 63,557 0.1947
2022-12-01 2022-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 132,578 -1,535 -1.14 58,519 22.78 0.1378
2022-04-26 2022-03-31 13F LOCKHEED MARTIN COM 539830109 132,578 -1,535 58,519 0.1362
2022-12-01 2021-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 134,113 -1,303 -0.96 47,663 1.99 0.1014
2022-01-31 2021-12-31 13F LOCKHEED MARTIN COM 539830109 134,113 -1,303 47,663 0.1002
2022-12-01 2021-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 135,416 -2,682 -1.94 46,733 -10.56 0.1036
2021-10-20 2021-09-30 13F LOCKHEED MARTIN COM 539830109 135,416 -2,682 46,733 0.1023
2022-12-01 2021-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 138,098 -3,502 -2.47 52,248 -0.15 0.1158
2021-07-28 2021-06-30 13F LOCKHEED MARTIN COM 539830109 138,098 -3,502 52,248 0.1142
2022-12-01 2021-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 141,600 -96,588 -40.55 52,324 -38.12 0.1290
2021-04-23 2021-03-31 13F LOCKHEED MARTIN COM 539830109 141,600 -96,588 52,324 0.1271
2022-12-01 2020-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 238,188 -16,027 -6.30 84,551 -13.22 0.2222
2021-01-28 2020-12-31 13F LOCKHEED MARTIN COM 539830109 238,188 -16,027 84,551 0.2195
2021-01-19 2020-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 254,215 -19,140 -7.00 97,433 -2.32 0.3011
2020-10-29 2020-09-30 13F LOCKHEED MARTIN COM 539830109 254,215 -19,140 97,433 300,904.8145
2021-01-19 2020-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 273,355 -55,152 -16.79 99,751 -10.41 0.3388
2020-07-20 2020-06-30 13F LOCKHEED MARTIN COM 539830109 273,355 -55,152 99,751 338,472.9354
2021-01-19 2020-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 328,507 -2,943 -0.89 111,345 -13.73 0.4467
2020-04-30 2020-03-31 13F LOCKHEED MARTIN COM 539830109 328,507 -2,943 111,345 446,295.8705
2021-01-19 2019-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 331,450 18,876 6.04 129,062 5.85 0.4132
2020-02-06 2019-12-31 13F LOCKHEED MARTIN COM 539830109 331,450 18,876 129,062 412,794.8822
2021-01-19 2019-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 312,574 35,872 12.96 121,924 21.21 0.4304
2019-10-17 2019-09-30 13F LOCKHEED MARTIN COM 539830109 312,574 35,872 121,924 429,832.2415
2021-01-19 2019-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 276,702 12,153 4.59 100,593 26.68 0.3552
2019-07-19 2019-06-30 13F LOCKHEED MARTIN COM 539830109 276,702 12,153 100,593 354,717.2300
2021-01-19 2019-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 264,549 -22,463 -7.83 79,405 5.66 0.2920
2019-05-02 2019-03-31 13F LOCKHEED MARTIN COM 539830109 264,549 -22,463 79,405 291,546.9129
2021-01-19 2018-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 287,012 -6,136 -2.09 75,151 -25.90 0.3374
2019-02-08 2018-12-31 13F LOCKHEED MARTIN COM 539830109 287,012 -6,136 75,151 336,860.6334
2021-01-19 2018-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 293,148 9,517 3.36 101,419 21.04 0.4017
2018-10-25 2018-09-30 13F LOCKHEED MARTIN COM 539830109 293,148 9,517 101,419
2021-01-19 2018-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 283,631 -2,955 -1.03 83,793 -13.48 0.3817
2018-08-03 2018-06-30 13F LOCKHEED MARTIN COM 539830109 283,631 -2,955 83,793
2021-01-19 2018-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 286,586 30,213 11.78 96,844 17.66 0.4544
2018-05-07 2018-03-31 13F LOCKHEED MARTIN COM 539830109 286,586 30,213 96,844 452,894.0860
2021-01-19 2017-12-31 13F/A-1 LOCKHEED MARTIN COM 539830109 256,373 -13,591 -5.03 82,309 -1.74 0.4265
2018-01-25 2017-12-31 13F LOCKHEED MARTIN COM 539830109 256,373 -13,591 82,309
2021-01-19 2017-09-30 13F/A-1 LOCKHEED MARTIN COM 539830109 269,964 -1,831 -0.67 83,763 11.01 0.5201
2017-10-17 2017-09-30 13F LOCKHEED MARTIN COM 539830109 269,964 -1,831 83,763 518,941.1699
2021-01-19 2017-06-30 13F/A-1 LOCKHEED MARTIN COM 539830109 271,795 -5,738 -2.07 75,454 1.60 0.4860
2017-08-07 2017-06-30 13F LOCKHEED MARTIN COM 539830109 271,795 -5,738 75,454 491,266.3080
2021-01-19 2017-03-31 13F/A-1 LOCKHEED MARTIN COM 539830109 277,533 5,811 2.14 74,266 9.36 0.4945
2017-05-15 2017-03-31 13F LOCKHEED MARTIN COM 539830109 277,533 5,811 74,266 493,270.2872
2017-02-09 2016-12-31 13F LOCKHEED MARTIN COM 539830109 271,722 9,888 3.78 67,911 8.20 0.5313
2016-11-07 2016-09-30 13F LOCKHEED MARTIN COM 539830109 261,834 22,553 9.43 62,767 5.71 0.4639
2016-07-22 2016-06-30 13F LOCKHEED MARTIN COM 539830109 239,281 52,110 27.84 59,379 43.23 0.4503
2016-05-16 2016-03-31 13F LOCKHEED MARTIN COM 539830109 187,171 -15,490 -7.64 41,458 -5.79 0.3326
2016-02-08 2015-12-31 13F LOCKHEED MARTIN COM 539830109 202,661 -247,353 -54.97 44,007 -52.83 0.3763
2015-11-12 2015-09-30 13F LOCKHEED MARTIN COM 539830109 450,014 24,711 5.81 93,291 18.00 0.7107
2015-08-17 2015-06-30 13F LOCKHEED MARTIN COM 539830109 425,303 -71,058 -14.32 79,062 -21.52 0.6001
2015-04-24 2015-03-31 13F LOCKHEED MARTIN COM 539830109 496,361 -77,135 -13.45 100,741 -8.78 0.7574
2015-02-12 2014-12-31 13F LOCKHEED MARTIN COM 539830109 573,496 26,229 4.79 110,438 10.41 0.7919
2014-11-10 2014-09-30 13F LOCKHEED MARTIN COM 539830109 547,267 38,311 7.53 100,029 22.28 0.7145
2014-08-13 2014-06-30 13F LOCKHEED MARTIN COM 539830109 508,956 122,736 31.78 81,803 29.75 0.5854
2014-05-07 2014-03-31 13F LOCKHEED MARTIN COM 539830109 386,220 88,870 29.89 63,046 42.62 0.4837
2014-02-04 2013-12-31 13F LOCKHEED MARTIN COM 539830109 297,350 128,680 76.29 44,205 105.46 0.3673
2013-11-12 2013-09-30 13F LOCKHEED MARTIN COM 539830109 168,670 102,643 155.46 21,515 200.45 0.2090
2013-08-27 2013-06-30 13F Lockheed Martin COM 539830109 66,027 66,027 7,161 0.0724
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.