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Corporate insider · Form 4

Ma David Y

Insider

Conviction score
-19
Sell signal
Buys
$0
0 transactions
Sells
$47.42M
16 transactions · $47.42M discretionary

All tracked transactions

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

DateTickerActionValue
Apr 17, 2026SEsell
$1.93M
20,720 × $93.04
Apr 17, 2026SEsell
$7.04M
76,252 × $92.34
Apr 17, 2026SEsell
$3.67M
40,080 × $91.47
Apr 17, 2026SEsell
$726K
8,020 × $90.57
Apr 17, 2026SEsell
$1.93M
20,720 × $93.04
Apr 17, 2026SEsell
$7.04M
76,252 × $92.34
Apr 17, 2026SEsell
$3.67M
40,080 × $91.47
Apr 17, 2026SEsell
$726K
8,020 × $90.57
Apr 16, 2026SEsell
$97K
1,043 × $93.05
Apr 16, 2026SEsell
$581K
6,299 × $92.3
Apr 16, 2026SEsell
$2.16M
23,651 × $91.33
Apr 16, 2026SEsell
$7.51M
83,101 × $90.4
Apr 16, 2026SEsell
$97K
1,043 × $93.05
Apr 16, 2026SEsell
$581K
6,299 × $92.3
Apr 16, 2026SEsell
$2.16M
23,651 × $91.33
Apr 16, 2026SEsell
$7.51M
83,101 × $90.4

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 (Insider).

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 Ma has traded

SE

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