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Castellum, Inc. Stock: price and insider trades · United States
3 insiders bought €28k of shares over the last 90 days, the latest by MARTIN TAMMY L, filed 01 Oct 2026.
Cluster: 2 buyers in 30 daysCastellum, Inc.: what insiders have been doing
This page follows insider dealings at Castellum, Inc. as filed with SEC (Form 4), a company from the Technology sector. The last twelve months, up to 23 October 2026, brought 26 filings signed by 6 insiders.
Both sides are active: 9 purchases worth €39k and 14 sales worth €662k, from 4 insiders and 2 insiders respectively. Taken together, the sales exceed the purchases by €623k. Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. On the buying side, the filings list 2 senior executives, 1 finance chief and 1 chief executive among the declarants. Wright Jay O filed the largest sale, €161k, on 13 November 2025.
In all, 5 purchases were made within 30 days of a purchase by another insider of the company. Purchases made close together by different insiders form what is called a cluster. The most recent open-market purchase was published on 1 October 2026, 23 days ago. Filings reach the SEC (Form 4) feed a median of 2 days after the trade. US insiders must file a Form 4 within two business days of a trade. A sale on its own says little: insiders also sell to pay tax, fund a purchase or diversify.
Compared with its exchange (2,023 companies, median 41 filings), a count of 26 filings is below the norm. Looking back to 2022, when coverage begins, insiders filed 49 purchases and 45 sales. The 10-K for the year ended 31 December 2025 shows 52.9 m USD of revenue and -2.4 m USD of net income.
In the same sector, recent insider purchases at Hanza AB and Lime Technologies AB (publ) also feature in our signals. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Insider Decl.
105
Thresholds
n/a
Buy Volume
€344M
49 ops. · all time
Sell Volume
€474M
45 ops. · all time
Who traded when
BuySaleJay O. Wright29 sales
Andrew Merriman4 buys
Mark C. Fuller4 sales
Glen R. Ives3 buys
Charles Thomas McMillen2 sales
David T. Bell1 buy
+1 other insider
Since the insiders bought
- -10.5%Entry US$0.63 · Close 22 Oct 2026 US$0.56
- -10.5%Entry US$0.63 · Close 22 Oct 2026 US$0.56
- -8.7%Entry US$0.62 · Close 22 Oct 2026 US$0.56
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Fundamental score
Ranked 22,071 of 26,248 companies
27.4
score / 100
Value23
Quality32
FCF yld-3.9%
Earn yld-4.6%
EV/EBITDA·
ROE-6.8%
Gross mgn37%
Net mgn-4.7%
Debt/EBITDA·
Pillars2/3
Transparent value + quality ranking, distinct from the insider signal.
Financial data
as of FY 2025FY ended December 2025 · cache
US$0.57
Analyst consensus
1 analystsUS$2.00Target US$2.00(+250%)US$2.00
Income statement
RevenueUS$52.9M
Gross profitUS$19.4M37% margin
EBITDA-US$1.3M-2% margin
Net income-US$2.5M-4.1% margin
Valuation
PER (forward)57.2x
P/Book1.5x
Beta-4.30
Balance sheet & cash
Market capUS$54.2M
Total debtUS$1.2M
Free Cash Flow-US$2.1M
Debt / Equity3%
Profitability & ownership
ROE-6.8%
ROA-4.0%
% insiders12.1%
% institutions8.4%
Last declaration on 1 October 2026
Declarations105 total
1,396 shares@ US$0.535255.8% of flowCommon StockSEC:0001877939-26-000087:0
Canonical exit: 30 Dec 2026 (T+90)
1,396 shares@ US$0.53520.0% of flowCommon StockSEC:0001877939-26-000086:0
Canonical exit: 30 Dec 2026 (T+90)
1,396 shares@ US$0.53522.1% of flowCommon StockSEC:0001877939-26-000085:0
Canonical exit: 30 Dec 2026 (T+90)
1,700 shares@ US$0.535210.5% of flowCommon StockSEC:0001877939-26-000084:0
Canonical exit: 30 Dec 2026 (T+90)
40,000 shares@ US$0.61930.044% mcap70.2% of flowCommon StockSEC:0001877939-26-000079:0
Canonical exit: 8 Dec 2026 (T+90)
10,000 shares@ US$0.620.011% mcap17.6% of flowCommon StockSEC:0001877939-26-000079:1
Canonical exit: 8 Dec 2026 (T+90)
1,202 shares@ US$0.6120.0% of flowCommon StockSEC:0001877939-26-000060:0
Canonical exit: 29 Sept 2026 (T+90)
1,329 shares@ US$0.45440.0% of flowCommon StockSEC:0001944338-26-000002:0
1,329 shares@ US$0.4544100.0% of flowCommon StockSEC:0001329293-26-000002:0
1,329 shares@ US$0.45441.7% of flowCommon StockSEC:0002036177-26-000004:0
2,000 shares@ US$0.64263.7% of flowCommon StockSEC:0002036177-26-000002:0
Canonical exit: 25 Jun 2026 (T+90)
2,000 shares@ US$0.615715.7% of flowCommon StockSEC:0001947023-26-000003:0
Canonical exit: 25 Jun 2026 (T+90)
30,000 shares@ US$0.70430.0% of flowCommon StockSEC:0001332108-26-000006:0
10,000 shares@ US$0.664984.3% of flowCommon StockSEC:0001877939-26-000021:0
Canonical exit: 24 Jun 2026 (T+90)
55,000 shares@ US$0.80180.0% of flowCommon StockSEC:0001877939-26-000020:0
3,000 shares@ US$0.79836.8% of flowCommon StockSEC:0001877939-26-000018:0
Canonical exit: 16 Jun 2026 (T+90)
30,000 shares@ US$1.050.0% of flowCommon StockSEC:0001310272-25-000026:0
12,000 shares@ US$1.070.3% of flowCommon StockSEC:0001877939-25-000127:1
6,000 shares@ US$1.1030.0% of flowCommon StockSEC:0001877939-25-000127:0
50,000 shares@ US$1.161.5% of flowCommon StockSEC:0001310272-25-000023:1
11,000 shares@ US$1.160.3% of flowCommon StockSEC:0001310272-25-000023:2
127,000 shares@ US$1.2070.0% of flowCommon StockSEC:0001310272-25-000023:0
35,000 shares@ US$1.051.0% of flowCommon StockSEC:0001310272-25-000021:1
18,000 shares@ US$1.0550.0% of flowCommon StockSEC:0001310272-25-000021:0
10,000 shares@ US$1.160.3% of flowCommon StockSEC:0001310272-25-000019:1
25 of 105 declarations
About Castellum, Inc.
Castellum, Inc. is a NASDAQ-listed company that specializes in providing cybersecurity solutions. It focuses on protecting critical infrastructure and sensitive data.
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