Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Castellum, Inc.

CTM · NYSE · CIK 0001877939 · Industrials · Information Technology Services

INSIDER SIGNAL

62.7 / 100

4 buyers · 10 purchase transaction lines · $37.1K gross purchase

WHY THIS SIGNAL?

Buyer breadthStrong
Purchase sizeLow
RoleModerate
RecencyModerate
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+28.0 / 35
Purchase size+4.2 / 25
Role+13.0 / 20
Recency+7.5 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Role scores low · most senior buyer: President (CEO, chair and 10% owners score lowest)
  • ✓ Cluster breadth is broad · 4+ insiders
  • ✓ Recent activity · latest purchase 2026-10-01

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Merriman AndrewChief Operating Officer
●●●
Bell David TChief Financial Officer
●●
MARTIN TAMMY LGeneral Counsel and Secretary
●●
Ives Glen RPresident
●●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS4
PURCHASE CONCENTRATION87%Largest buyer: Merriman Andrew · $32.5K
CLUSTER BUYING · 15D4 insidersPeak activity: 2026-07-01–2026-07-01

Roles in the peak window: Chief Financial Officer, Chief Operating Officer, General Counsel and Secretary, President. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

62.7 / 100

Latest recorded score

↓ -0.3 ptsversus the previous recorded snapshot
  1. 63.5
  2. 63.3
  3. 63.2
  4. 63.0
  5. 62.7

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

14Purchases
14Sales
3Other Form 4 lines
24SEC filings · 365 days
BUYING10 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER0 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot detected in parsed evidence

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+0.8%
3M
-1.0%
6M
-4.6%
12M
-40.7%

Volatility & liquidity

Volatility
159.9%
Beta
—
Avg daily value
USD 527,531

Valuation

Market cap
USD 59.0M
P/E
—

Fundamentals

Profit margin
-4.5%
ROE
-6.7%
Industry
Information Technology Services

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, Profit margin, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-05 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
5,423,015
Previous report
5,425,022
Avg daily volume
412,728
Days to cover
13.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Merriman AndrewPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01MARTIN TAMMY LPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01Ives Glen RPurchase (P)Common Stock1,700USD 0.54USD 910SEC filing ↗
2026-10-01Bell David TPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-09-09Merriman AndrewPurchase (P)Common Stock50,000USD 0.62USD 31,000SEC filing ↗
2026-07-01Merriman AndrewPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-07-01MARTIN TAMMY LPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-07-01Ives Glen RPurchase (P)Common Stock1,262USD 0.61USD 770SEC filing ↗
2026-07-01Bell David TPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-03-27Merriman AndrewPurchase (P)Common Stock2,000USD 0.64USD 1,280SEC filing ↗
2026-03-27Ives Glen RPurchase (P)Common Stock2,000USD 0.62USD 1,240SEC filing ↗
2026-03-26Ives Glen RPurchase (P)Common Stock10,000USD 0.66USD 6,600SEC filing ↗
2026-03-18Merriman AndrewPurchase (P)Common Stock3,000USD 0.80USD 2,400SEC filing ↗
2024-09-04WRIGHT JAY OPurchase (P)Common Stock272,300USD 0.16USD 43,568SEC filing ↗
2024-09-03WRIGHT JAY OPurchase (P)Common Stock44,400USD 0.17USD 7,548SEC filing ↗

Form 4 evidence

31 transaction lines in the latest 365-day window; 123 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Merriman AndrewPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01MARTIN TAMMY LPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01Ives Glen RPurchase (P)Common Stock1,700USD 0.54USD 910SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01Merriman AndrewPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01MARTIN TAMMY LPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-10-01Ives Glen RPurchase (P)Common Stock1,700USD 0.54USD 910SEC filing ↗
2026-10-01Bell David TPurchase (P)Common Stock1,396USD 0.54USD 747SEC filing ↗
2026-09-09Merriman AndrewPurchase (P)Common Stock50,000USD 0.62USD 31,000SEC filing ↗
2026-07-01Merriman AndrewPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-07-01MARTIN TAMMY LPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-07-01Ives Glen RPurchase (P)Common Stock1,262USD 0.61USD 770SEC filing ↗
2026-07-01Bell David TPurchase (P)Common Stock1,202USD 0.61USD 733SEC filing ↗
2026-03-31Merriman AndrewAward / grant (A)Common Stock1,329USD 0.45USD 598SEC filing ↗
2026-03-31MARTIN TAMMY LAward / grant (A)Common Stock1,329USD 0.45USD 598SEC filing ↗
2026-03-31Bell David TAward / grant (A)Common Stock1,329USD 0.45USD 598SEC filing ↗
2026-03-27Merriman AndrewPurchase (P)Common Stock2,000USD 0.64USD 1,280SEC filing ↗
2026-03-27Ives Glen RPurchase (P)Common Stock2,000USD 0.62USD 1,240SEC filing ↗
2026-03-26Ives Glen RPurchase (P)Common Stock10,000USD 0.66USD 6,600SEC filing ↗
2026-03-25McMillen Charles ThomasSale (S)Common Stock30,000USD 0.70USD 21,000SEC filing ↗
2026-03-18McMillen Charles ThomasSale (S)Common Stock55,000USD 0.80USD 44,000SEC filing ↗
2026-03-18Merriman AndrewPurchase (P)Common Stock3,000USD 0.80USD 2,400SEC filing ↗
2025-12-19WRIGHT JAY OSale (S)Common Stock30,000USD 1.05USD 31,500SEC filing ↗
2025-12-16WRIGHT JAY OSale (S)Common Stock12,000USD 1.07USD 12,840SEC filing ↗
2025-12-15WRIGHT JAY OSale (S)Common Stock6,000USD 1.10USD 6,600SEC filing ↗
2025-12-12WRIGHT JAY OSale (S)Common Stock11,000USD 1.16USD 12,760SEC filing ↗
2025-12-11WRIGHT JAY OSale (S)Common Stock50,000USD 1.16USD 58,000SEC filing ↗
2025-12-10WRIGHT JAY OSale (S)Common Stock127,000USD 1.21USD 153,670SEC filing ↗
2025-12-01WRIGHT JAY OSale (S)Common Stock35,000USD 1.05USD 36,750SEC filing ↗
2025-11-28WRIGHT JAY OSale (S)Common Stock18,000USD 1.06USD 19,080SEC filing ↗
2025-11-17WRIGHT JAY OSale (S)Common Stock10,000USD 1.16USD 11,600SEC filing ↗
2025-11-14WRIGHT JAY OSale (S)Common Stock90,000USD 1.15USD 103,500SEC filing ↗
2025-11-13WRIGHT JAY OSale (S)Common Stock160,000USD 1.17USD 187,200SEC filing ↗
2025-11-11WRIGHT JAY OSale (S)Common Stock60,000USD 1.18USD 70,800SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerCTM
CIK0001877939
SectorIndustrials
IndustryInformation Technology Services Yahoo Finance
SEC SIC8742 Services-Management Consulting Services
ExchangeNYSE

Data coverage

Local Form 4 history123 transaction lines from 2022-10-17 to 2026-10-01
64 P purchase lines · 47 S sale lines · 12 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.