Kratos Defense & Security Solutions, Inc.
MX ˙ BMV ˙ US50077B2079
SecurityMX:KTOS / Kratos Defense & Security Solutions, Inc.
InstitutionCastleark Management Llc
Latest Disclosed Ownership109,634 shares
Latest Disclosed Value $ 7,730,293
Castleark Management Llc reports 28.30% decrease in ownership of KTOS / Kratos Defense & Security Solutions, Inc.

On May 15, 2026 - Castleark Management Llc filed a 13F-HR form disclosing ownership of 109,634 shares of Kratos Defense & Security Solutions, Inc. (MX:KTOS) valued at $7,730,293 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 152,904 shares of Kratos Defense & Security Solutions, Inc.. This represents a change in shares of -28.30% 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)
2026-05-15 2026-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 109,634 -43,270 -28.30 7,730 -33.40 0.2558
2026-02-12 2025-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 152,904 -28,050 -15.50 11,607 -29.80 0.3407
2025-11-17 2025-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 180,954 6,788 3.90 16,534 104.36 0.4636
2025-08-18 2025-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 174,166 44,996 34.83 8,090 110.95 0.2431
2025-05-15 2025-03-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 129,170 129,170 3,835 0.1329
2018-02-15 2017-12-31 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 0 -762,895 -100.00 0 -100.00
2017-11-15 2017-09-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 762,895 99,045 14.92 9,979 26.64 0.3132
2017-08-15 2017-06-30 13F KRATOS DEFENSE & SEC SOLUTIO COM NEW 50077B207 663,850 663,850 7,880 0.2575
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.