Castellum (CTM) SEC Filings & 10K Form $1.19 +0.08 (+7.21%) Closing price 04:10 PM EasternExtended Trading$1.20 +0.01 (+0.84%) As of 07:16 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share SEC Filings Stock AnalysisAnalyst ForecastsChartEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestBuy This Stock Recent Castellum SEC Filings All Filing Types 1 10 10-D 10-K 10-M 10-Q 11-K 12b-25 13F 13H 144 15 15F 17-H 18 18-K 19b-4(e) 19b-4 19b-7 1-A 1-E 1-K 1-N 1-SA 1-U 1-Z 20-F 24F-2 25 2-E 3 4 40-F 5 6-K 7-M 8-A 8-K 8-M 9-M ABS DD-15E ABS-15G ABS-EE ADV ADV-E ADV-H ADV-NR ADV-W ATS ATS-R BD BD-N BDW C CA-1 CB CFPORTAL D F-1 F-10 F-3 F-4 F-6 F-7 F-8 F-80 F-N F-X ID MA MA-I MA-NR MA-W MSD MSDW n/a N-14 N-17D-1 N-17f-1 N-17f-2 N-18f-1 N-1A N-2 N-23c-3 N-27D-1 N-3 N-4 N-5 N-54A N-54C N-6 N-6EI-1 N-6F N-8A N-8B-2 N-8B-4 N-8F N-CR N-CSR N-MFP N-PX N-Q NRSRO N-SAR PF PILOT R31 S-1 S-11 S-20 S-3 S-4 S-6 S-8 SBSE SBSE-A SBSE-BD SBSE-C SBSE-W SCI SD SDR SE SF-1 SF-3 SIP T-1 T-2 T-3 T-4 T-6 TA-1 TA-2 TA-W TCR TH WB-APP X-17A-19 X-17A-5 Part I X-17A-5 Part II X-17A-5 Part IIA X-17A-5 Part IIB X-17A-5 Part III X-17A-5 Schedule I X-17F-1A Filing Types Include Ownership Filings Exclude Ownership Filings Only Show Ownership FIlings Ownership Filings Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 2 Years 3 Years Time Frame Start Date End Date Export to Excel DateFilerForm TypeView06/24/20253:11 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 06/17/20255:31 AMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 06/12/20254:27 PMCastellum (Filer)Form 424B506/11/20253:55 PMCastellum (Filer)Form 424B506/06/20255:46 AMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 05/20/20253:50 PMCastellum (Issuer)Fuller Mark C (Reporting)Form 4Statement of changes in beneficial ownership of securities 05/19/202512:25 PMCastellum (Subject)Fuller Mark C (Reporting)Form 144Notice of proposed sale of securities pursuant to Rule 144 04/11/20253:04 PMCastellum (Filer)Form DEF 14A04/10/20253:02 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 03/12/20253:43 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 03/06/20254:03 PMCastellum (Issuer)Fuller Mark C (Reporting)Form 4Statement of changes in beneficial ownership of securities Get the Latest News and Ratings for CTM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Castellum and its competitors with MarketBeat's FREE daily newsletter. 03/04/20258:18 AMCastellum (Subject)Fuller Mark C (Reporting)Form 144Notice of proposed sale of securities pursuant to Rule 144 03/04/20258:21 AMCastellum (Subject)WRIGHT JAY O (Reporting)Form 144Notice of proposed sale of securities pursuant to Rule 144 02/25/20253:25 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 01/26/202511:15 PMCastellum (Filer)Form EFFECT01/22/20253:01 PMCastellum (Filer)Form S-3/A01/14/20253:01 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 01/08/20253:02 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 12/30/20245:00 AMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 12/30/20245:03 AMCastellum (Filer)Form 424B512/27/20245:09 AMCastellum (Filer)Form 424B512/23/20243:47 PMCastellum (Filer)Form 424B509/24/20243:03 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 09/04/20243:44 PMCastellum (Issuer)Merriman Andrew (Reporting)Form 3Initial statement of beneficial ownership of securities 08/30/20245:01 AMCastellum (Issuer)WRIGHT JAY O (Reporting)Form 4Statement of changes in beneficial ownership of securities 08/14/20244:52 PMCastellum (Issuer)WRIGHT JAY O (Reporting)Form 4Statement of changes in beneficial ownership of securities 08/09/20243:17 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) 07/10/20243:01 PMCastellum (Filer)Form 8-KCurrent report pursuant to Section 13 or 15(d) (Data available from 1/1/2016 forward) Related Companies and Tools Related Companies Arrive AI 10K Form Ooma 10K Form Rimini Street 10K Form Zhihu 10K Form Absci 10K Form Performant Healthcare 10K Form Lightbridge 10K Form International Money Express 10K Form Spree Acquisition Corp. 1 10K Form CPI Card Group 10K Form SEC Filings Tools Latest SEC FilingsInsider Trading Activity This page (NYSEAMERICAN:CTM) was last updated on 7/7/2025 by MarketBeat.com Staff From Our PartnersA grave, grave error.I thought what happened 25 years ago was a once- in-a-lifetime event… but how wrong I was. 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