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Corporate insider · Form 4

MAETZOLD DEREK J

Pres. & Chief Exec. Officer

Conviction score
0
Neutral
Buys
$3K
2 transactions
Sells
$209K
16 transactions · $209K discretionary

All tracked transactions

Curated subset of MAETZOLD DEREK J's SEC Form 4 filings. Routine 10b5-1 schedule sales are flagged inline and weighted less in the conviction score.

DateTickerActionValue
Apr 21, 2026CSTLsell
$0
550 × $0
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$29K
1,153 × $25.098
Apr 21, 2026CSTLsell
$34K
1,357 × $25.098
Apr 21, 2026CSTLsell
$14K
550 × $25.098
Apr 21, 2026CSTLbuy
$1K
550 × $2.39
Apr 21, 2026CSTLsell
$0
550 × $0
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$7K
278 × $25.098
Apr 21, 2026CSTLsell
$29K
1,153 × $25.098
Apr 21, 2026CSTLsell
$34K
1,357 × $25.098
Apr 21, 2026CSTLsell
$14K
550 × $25.098
Apr 21, 2026CSTLbuy
$1K
550 × $2.39

Method

Conviction score = logistic(role_weight × (buy_value − 0.2 × discretionary_sell_value)) mapped to −100..+100. CEOs and founders carry role_weight 0.95-1.0; directors 0.5; former executives 0.3. Routine 10b5-1 schedule sales are weighted down sharply — insiders file pre-arranged selling plans that trigger independent of their view of the stock, so they carry minimal signal. Open-market discretionary buys are rare and carry the heaviest weight.

Role weight: 0.40 (Pres. & Chief Exec. Officer).

Data sourced from SEC Form 4 filings via EDGAR. Curated subset (not every filing) — we prioritize CEO/CFO/Chair/10%-owner transactions and material $ amounts over noise.

Tickers MAETZOLD has traded

CSTL

SEC Form 4 filings disclose trades by corporate insiders within 2 business days. Conviction scoring is a synthesis — not investment advice.