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Total declarations
Company
▲ Purchases (4 ops.)
▼ Sales (4 ops.)
Latest filing published 03 Sept 2025 for Castellum, Inc., €480k. Read the official filing
Filing timeline
BuySaleMark C. Fuller
Insider track record
Disclosed buys
4
Disclosed sells
4
Signal history
Closed purchases
Market purchases
4
Not enough history yet: 0 closed purchases, at least 2 are needed.
Purchases by company
Mark C. Fuller: trading record in brief
Mark C. Fuller discloses dealings in Castellum, Inc. to SEC (Form 4). Over a trading history stretching from 17 October 2022 to 3 September 2025, the count stands at 10 filings.
Both buying and selling appear: 4 purchases worth €87.5M, against 4 sales worth €86.9M. Netting one side against the other leaves €585k of net buying. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Since January 2025: no purchases and 2 sales on the market.
Half of the purchases are above €6.7M and half below.
The latest filing, published on 3 September 2025, reports an open-market sale of €480k in Castellum, Inc. The clock since the last published purchase (14 June 2023) now reads 1,222 days. Typically, a trade is published a median of 2 days after it takes place. US insiders must file a Form 4 within two business days of a trade. Source: insider filings from SEC (Form 4). Past trades are no guide to future returns.
Companies and markets linked to Mark C. Fuller
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations10 total
500,000 shares@ US$1.120.5% of flowCommon StockSEC:0001944544-25-000014:0
500,000 shares@ US$1.0480.5% of flowCommon StockSEC:0001944544-25-000012:0
50,000 sharesCommon StockSEC:0001944544-25-000010:0
1,000 shares@ US$0.64950.0% of flowCommon StockSEC:0001575872-23-000955:0
Canonical exit: 11 Sept 2023 (T+90)
1,294 shares@ US$1,246.001.7% of flowCommon StockSEC:0001575872-22-001296:0
Canonical exit: 2 Mar 2023 (T+90)
9,544 shares@ US$8,017.0042.6% of flowCommon StockSEC:0001575872-22-001226:0
Canonical exit: 28 Feb 2023 (T+90)
4,302 shares@ US$2,860.006.8% of flowCommon StockSEC:0001575872-22-001228:0
Canonical exit: 26 Feb 2023 (T+90)
9,544 shares@ US$8,017.0083.8% of flowCommon StockSEC:0001575872-22-001203:0
4,302 shares@ US$2,860.0013.4% of flowCommon StockSEC:0001575872-22-001192:0
7,522,500 sharesCommon StockSEC:0001575872-22-000997:0
10 of 10 declarations
