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Castellum, Inc.

CTM
Exchange
NYSE
Industry
Services-Management Consulting Services
SEC CIK
0001877939

In the last 90 days, Castellum, Inc. insiders filed 5 open-market purchases and 0 sales; 35 institutions reported holding it in 13F filings for Q2 2026, worth $5.69M in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Castellum, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
5 filings
4 insiders, $34.0K in total
Open-market sells
0 filings
Insiders trading
4
Net value
+$34.0K
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Castellum, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Castellum, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Merriman AndrewChief Operating Officer588,531Sep 9, 20266
Bell David TChief Financial Officer17,255Jul 2, 20263
Martin Tammy LGeneral Counsel and Secretary15,031Jul 2, 20262
Ives Glen RPresident200,878Jul 2, 20264
McMillen Charles ThomasDirector231,015Mar 27, 20263
Wright Jay OGeneral Counsel, Secretary7,134,973Dec 22, 20256
Champoux Bernard SDirector104,536Nov 13, 20251
Alarie Mark SDirector112,920Nov 13, 20251
Campbell John FrancisDirector126,537Nov 13, 20251
Fuller Mark COther: Former Officer and Affiliate6,113,659Sep 3, 20250
Buckhout Laurie M10% Owner–Feb 23, 20240
Frost PatriciaDirector62,920Mar 23, 20230
Kaunitz EmilDirector1,999,856Dec 21, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 9, 2026 (view filing)4:02 PM ETSep 9Same dayMerriman AndrewChief Operating OfficerPPurchase+50.0K$0.6194+$31.0K+9.3%588.5K after2 lots
Jul 2, 2026 (view filing)4:07 PM ETJul 11 dayMerriman AndrewChief Operating OfficerPPurchase+1.20K$0.612+$735.62+0.2%538.5K after
Jul 2, 2026 (view filing)4:06 PM ETJul 11 dayBell David TChief Financial OfficerPPurchase+1.20K$0.612+$735.62+7.5%17.3K after
Jul 2, 2026 (view filing)4:05 PM ETJul 11 dayMartin Tammy LGeneral Counsel and SecretaryPPurchase+1.20K$0.612+$735.62+8.7%15.0K after
Jul 2, 2026 (view filing)4:05 PM ETJul 11 dayIves Glen RPresidentPPurchase+1.26K$0.612+$772.34+0.6%200.9K after
Mar 27, 2026 (view filing)Mar 27Same dayMerriman AndrewChief Operating OfficerPPurchase+2.00K$0.64+$1.28K+0.4%536.0K after
Mar 27, 2026 (view filing)Mar 27Same dayIves Glen RPresidentPPurchase+2.00K$0.62+$1.24K+1.0%199.6K after
Mar 27, 2026 (view filing)Mar 252 daysMcMillen Charles ThomasDirectorSSale−30.0K$0.70−$21.0K−11.5%231.0K after
Mar 26, 2026 (view filing)Mar 26Same dayIves Glen RPresidentPPurchase+10.0K$0.66+$6.60K+5.3%197.6K after
Mar 20, 2026 (view filing)Mar 182 daysMcMillen Charles ThomasDirectorSSale−55.0K$0.80−$44.0K−17.4%261.0K after
Mar 18, 2026 (view filing)Mar 18Same dayMerriman AndrewChief Operating OfficerPPurchase+3.00K$0.80+$2.40K+0.6%534.0K after
Dec 22, 2025 (view filing)Dec 193 daysWright Jay OGeneral Counsel, SecretarySSale−30.0K$1.05−$31.5K−0.4%7.13M after
Dec 17, 2025 (view filing)Dec 15-162 daysWright Jay OGeneral Counsel, SecretarySSale−18.0K$1.08−$19.4K−0.3%7.16M after2 lots
Dec 12, 2025 (view filing)Dec 10-122 daysWright Jay OGeneral Counsel, SecretarySSale−188.0K$1.19−$224.4K−2.6%7.18M after3 lots
Dec 2, 2025 (view filing)Nov 28-Dec 14 daysWright Jay OGeneral Counsel, SecretarySSale−53.0K$1.05−$55.8K−0.7%7.37M after2 lots
Nov 18, 2025 (view filing)Nov 14-174 daysWright Jay OGeneral Counsel, SecretarySSale−100.0K$1.15−$115.1K−1.3%7.42M after2 lots
Nov 13, 2025 (view filing)Nov 11-132 daysWright Jay OGeneral Counsel, SecretarySSale−220.0K$1.17−$258.0K−2.8%7.52M after2 lots
Sep 17, 2025 (view filing)Sep 15-162 daysWright Jay OGeneral Counsel, SecretarySSale−100.0K$1.11−$110.5K−1.3%7.74M after2 lots
Sep 12, 2025 (view filing)Sep 10-122 daysWright Jay OGeneral Counsel, SecretarySSale−233.0K$1.12−$261.0K−2.9%7.84M after3 lots
Sep 9, 2025 (view filing)Sep 5-94 daysWright Jay OGeneral Counsel, SecretarySSale−446.7K$1.12−$498.4K−5.2%8.08M after3 lots
Sep 3, 2025 (view filing)Sep 3Same dayFuller Mark COther: Former Officer and AffiliateSSale−500.0K$1.12−$560.0K−7.6%6.11M after
Aug 28, 2025 (view filing)Aug 27-281 dayWright Jay OGeneral Counsel, SecretarySSale−64.0K$1.04−$66.8K−0.7%8.52M after2 lots
Aug 26, 2025 (view filing)Aug 22-264 daysWright Jay OGeneral Counsel, SecretarySSale−85.0K$1.04−$88.4K−1.0%8.59M after2 lots
Aug 20, 2025 (view filing)Aug 18-192 daysWright Jay OGeneral Counsel, SecretarySSale−351.0K$1.07−$375.3K−3.9%8.67M after2 lots
May 20, 2025 (view filing)May 191 dayFuller Mark CDirector, 10% OwnerSSale−500.0K$1.05−$525.0K−7.0%6.61M after
May 20, 2025 (view filing)May 191 dayWright Jay OGeneral Counsel, SecretarySSale−259.4K$1.07−$277.6K−2.8%9.02M after
Mar 7, 2025 (view filing)Mar 5-62 daysWright Jay OGeneral Counsel, SecretarySSale−500.0K$1.43−$717.5K−5.0%9.52M after2 lots
Mar 6, 2025 (view filing)Mar 5-61 dayFuller Mark CDirector, 10% OwnerSSale−500.0K$1.42−$709.0K−6.6%7.11M after2 lots
Sep 5, 2024 (view filing)4:01 PM ETSep 41 dayWright Jay OGeneral Counsel, SecretaryPPurchase+272.3K$0.164+$44.7K+2.8%10.1M after
Sep 4, 2024 (view filing)4:10 PM ETSep 31 dayWright Jay OGeneral Counsel, SecretaryPPurchase+44.4K$0.165+$7.33K+0.5%9.85M after
Aug 30, 2024 (view filing)6:01 AM ETAug 291 dayWright Jay OGeneral Counsel, SecretaryPPurchase+61.6K$0.164+$10.1K+0.6%9.81M after
Aug 29, 2024 (view filing)4:03 PM ETAug 281 dayWright Jay OGeneral Counsel, SecretaryPPurchase+97.9K$0.163+$16.0K+1.0%9.75M after
Aug 14, 2024 (view filing)5:52 PM ETAug 14Same dayWright Jay OGeneral Counsel, SecretaryPPurchase+115.2K$0.144+$16.6K+1.2%9.65M after
Jun 24, 2024 (view filing)6:26 AM ETJun 20-214 daysWright Jay OGeneral Counsel, SecretaryPPurchase+124.2K$0.1824+$22.7K+1.3%9.53M after2 lots
Jun 14, 2023 (view filing)Jun 131 dayFuller Mark CCEO, PresidentPPurchase+1.00K$0.65+$6500.0%7.66M after
Apr 3, 2023 (view filing)Mar 313 daysWright Jay OSee RemarksPPurchase+18.4K$1.08+$19.9K+0.2%9.41M after
Mar 31, 2023 (view filing)Mar 292 daysWright Jay OSee RemarksPPurchase+5.59K$1.13+$6.32K+0.1%9.39M after
Mar 30, 2023 (view filing)Mar 282 daysWright Jay OSee RemarksPPurchase+7.90K$1.13+$8.93K+0.1%9.39M after
Mar 27, 2023 (view filing)Mar 243 daysWright Jay OSee RemarksPPurchase+4.90K$1.10+$5.39K+0.1%9.38M after
Mar 23, 2023 (view filing)Mar 212 daysChampoux Bernard SDirector, Other: Chair of Board of DirectorsPPurchase+62.9K$1.19+$75.0K+151.2%104.5K after2 lots
Mar 23, 2023 (view filing)Mar 212 daysFrost PatriciaDirectorPPurchase+62.9K$1.19+$75.0KNew position62.9K after2 lots
Mar 23, 2023 (view filing)Mar 212 daysMcMillen Charles ThomasDirectorPPurchase+62.9K$1.19+$75.0K+348.3%81.0K after2 lots
Mar 23, 2023 (view filing)Mar 221 dayWright Jay OSee RemarksPPurchase+9.40K$1.07+$10.1K+0.1%9.37M after
Mar 23, 2023 (view filing)Mar 212 daysCampbell John FrancisDirectorPPurchase+62.9K$1.19+$75.0K+98.9%126.5K after2 lots
Mar 23, 2023 (view filing)Mar 212 daysAlarie Mark SDirectorPPurchase+62.9K$1.19+$75.0K+125.8%112.9K after2 lots
Mar 20, 2023 (view filing)Mar 173 daysWright Jay OSee remarksPPurchase+16.0K$1.04+$16.6K+0.2%9.36M after
Mar 16, 2023 (view filing)Mar 151 dayWright Jay OSee RemarksPPurchase+17.8K$1.05+$18.7K+0.2%9.35M after
Mar 15, 2023 (view filing)Mar 141 dayWright Jay OSee RemarksPPurchase+3.20K$1.08+$3.46K0.0%9.33M after
Mar 13, 2023 (view filing)Mar 103 daysWright Jay OSee RemarksPPurchase+10.6K$11,043.00+$117.1M+0.1%9.33M afterPrice outlier
Mar 6, 2023 (view filing)Mar 33 daysWright Jay OSee RemarksPPurchase+30.1K$29,984.00+$902.5M+0.3%9.32M afterPrice outlier