Security key
14838T204
- Security type / class
- Equity / COM NEW
- Total 13F shares
- 7,735,010
- Total 13F value
- $4,561,008
- Share change
- -5,294,902
- SEC-reported price per share
- $0.59
- Number of holders
- 27
- Value change
- -$4,333,756
- Number of buys
- 9
- Number of sells
- 24
Report period
Q1 2026
Institutions
27
Top holders
10
CTM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
Castellum, Inc. SEC filings
Castellum, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 14838T204
Recent filing periods:
Ownership snapshot
Top reported holders of CTM - Castellum, Inc. - COM NEW (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Buckhout Laurie M.
Disclosed value leader
Jay O Wright
Comparable rows
0/15
Latest evidence
31 Dec 2025
3/4/5
13F
Highest disclosed value: $7,491,721
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
Jay O Wright has the largest disclosed position value at $7.49M.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Jay O Wright's linked filing trail.
Disclosed position value
Top 5
Jay O Wright
$7.49M
Mark C. Fuller
$6.85M
VANGUARD GROUP INC
$3.14M
UBS Group AG
$1.95M
ESSEX INVESTMENT MANAGEMENT CO LLC
$1.91M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Buckhout Laurie M. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
16,290 shares
|
— | 23 Feb 2024 |
| Jay O Wright |
3/4/5
General Counsel, Secretary, Director, EVP - Strategy
|
—
class O/S missing
|
$7,491,721
7,134,973 shares
|
-$2,103,391 | 19 Dec 2025 |
| Mark C. Fuller |
3/4/5
Former Officer and Affiliate
|
—
class O/S missing
|
$6,847,298
6,113,659 shares
|
-$560,000 | 03 Sep 2025 |
| VANGUARD GROUP INC |
13F
Company
|
—
class O/S missing
|
$3,136,325
3,473,227 shares
|
— | 31 Dec 2025 |
| UBS Group AG |
13F
Company
|
—
class O/S missing
|
$1,946,107
2,155,157 shares
|
— | 31 Dec 2025 |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
Company
|
—
class O/S missing
|
$1,909,391
2,114,029 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
27
Shares
7,735,010
Rows available
27
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
40
Q1 2026 holders
27
Holder diff
-13
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend