Kratos Defense & Security Solutions, Inc.
MX ˙ BMV ˙ US50077B2079
SecurityMX:KTOS / Kratos Defense & Security Solutions, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership207,001 shares
Latest Disclosed Value $ 14,595,641
Millennium Management Llc ownership in KTOS / Kratos Defense & Security Solutions, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 207,001 shares of Kratos Defense & Security Solutions, Inc. (MX:KTOS) valued at $14,595,641 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 571,036 shares of Kratos Defense & Security Solutions, Inc.. This represents a change in shares of -63.75% during the quarter.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (KTOS) in the form of stock options. The firm currently holds call options representing 16,100 of underlying shares valued at $1,135,211 USD and put options representing 101,100 of underlying shares valued at $7,128,561 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:KTOS / Kratos Defense & Security Solutions, Inc. Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 207,001 -364,035 -63.75 14,596 -66.33 0.0061
2026-02-17 2025-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 571,036 -335,464 -37.01 43,347 -47.66 0.0182
2025-11-14 2025-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 906,500 906,500 82,827 0.0354
2025-02-14 2024-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 0 -132,056 -100.00 0 -100.00
2024-11-14 2024-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 132,056 116,991 776.57 3,077 921.93 0.0015
2024-08-14 2024-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 15,065 -11,974 -44.28 301 -39.31 0.0001
2024-05-15 2024-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 27,039 27,039 497 0.0002
2023-11-14 2023-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 0 -254,177 -100.00 0 -100.00
2023-08-14 2023-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 254,177 -1,606,924 -86.34 3,645 -85.48 0.0018
2023-05-15 2023-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,861,101 694,593 59.54 25,088 108.41 0.0144
2023-02-14 2022-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,166,508 250,747 27.38 12,038 29.39 0.0067
2022-11-14 2022-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 915,761 865,282 1,714.14 9,304 1,227.25 0.0055
2022-08-15 2022-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 50,479 -489,480 -90.65 701 -93.66 0.0004
2022-05-16 2022-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 539,959 78,885 17.11 11,058 23.62 0.0059
2022-02-14 2021-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 461,074 448,474 3,559.32 8,945 3,083.27 0.0045
2021-11-15 2021-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 12,600 12,600 281 0.0002
2021-08-16 2021-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 0 -12,458 -100.00 0 -100.00
2021-05-17 2021-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 12,458 -7,957 -38.98 340 -39.29 0.0002
2021-02-16 2020-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 20,415 20,415 560 0.0004
2020-11-16 2020-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 0 -26,188 -100.00 0 -100.00
2020-08-14 2020-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 26,188 -342,219 -92.89 409 -91.98 0.0006
2020-05-14 2020-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 368,407 346,747 1,600.86 5,099 1,207.44 0.0115
2020-02-14 2019-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 21,660 -21,667 -50.01 390 -51.55 0.0005
2019-11-14 2019-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 43,327 -35,072 -44.74 805 -55.15 0.0013
2019-08-15 2019-06-30 13F/A-1 KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 78,399 -535,969 -87.24 1,795 -81.31 0.0027
2019-08-14 2019-06-30 13F AMPHENOL CORP CL A 50077B207 286,488 -327,880 27,486
2019-05-14 2019-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 614,368 573,902 1,418.23 9,603 1,584.74 0.0144
2019-02-15 2018-12-31 13F/A-1 KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 40,466 -940,158 -95.87 570 -96.07 0.0009
2019-02-14 2018-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 40,466 570
2018-11-14 2018-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 980,624 -2,759,898 -73.78 14,494 -66.33 0.0178
2018-08-14 2018-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 3,740,522 394,260 11.78 43,053 25.03 0.0562
2018-05-15 2018-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 3,346,262 827,752 32.87 34,433 29.10 0.0459
2018-02-14 2017-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,518,510 149,055 6.29 26,671 -13.94 0.0368
2017-11-14 2017-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,369,455 627,431 36.02 30,992 49.88 0.0472
2017-08-14 2017-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,742,024 -1,264,114 -42.05 20,678 -11.59 0.0369
2017-05-15 2017-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 3,006,138 570,944 23.45 23,388 29.79 0.0429
2017-02-14 2016-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,435,194 514,650 26.80 18,020 36.17 0.0377
2016-11-14 2016-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,920,544 -429,612 -18.28 13,233 37.33 0.0222
2016-08-15 2016-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,350,156 832,143 54.82 9,636 28.24 0.0221
2016-05-16 2016-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,518,013 -899,524 -37.21 7,514 -24.19 0.0188
2016-02-16 2015-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,417,537 196,694 8.86 9,912 5.76 0.0208
2015-11-16 2015-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 2,220,843 695,322 45.58 9,372 -2.49 0.0181
2015-08-14 2015-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,525,521 -280,381 -15.53 9,611 -3.76 0.0182
2015-05-15 2015-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,805,902 -47,877 -2.58 9,987 7.32 0.0186
2015-02-17 2014-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,853,779 805,735 76.88 9,306 35.36 0.0197
2014-11-14 2014-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,048,044 246,570 30.76 6,875 9.98 0.0174
2014-08-14 2014-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 801,474 -110,738 -12.14 6,251 -9.12 0.0173
2014-05-15 2014-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 912,212 -345,764 -27.49 6,878 -28.81 0.0199
2014-02-14 2013-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,257,976 -38,133 -2.94 9,661 -9.98 0.0305
2013-11-14 2013-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,296,109 -373,471 -22.37 10,732 -0.80 0.0346
2013-08-14 2013-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 1,669,580 1,669,580 10,819 0.0332
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Call 16,100 -66.32 1,135 -68.72 n/a n/a n/a
2026-02-17 2025-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Call 47,800 -20.20 3,628 -33.71 n/a n/a n/a
2025-11-14 2025-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Call 59,900 33.11 5,473 161.87 n/a n/a n/a
2025-08-14 2025-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Call 45,000 -1.96 2,090 53.45 n/a n/a n/a
2025-05-15 2025-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Call 45,900 1,363 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-15 2026-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW Put 101,100 7,129 n/a n/a n/a
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.