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MARK A EMALFARB

CIK 1328287 · CEO · last filed 2026-01-06

MARK A EMALFARB is a CEO who has filed 15 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for DYAI, was dated Jan 6, 2026. Across all open-market trades the lifetime net is −$1.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.9M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$9.87M

Companies

2

Total Filings

15

Lifetime Open-Market Net

-$1.64M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
DYAI CEO 9,226,682 $1.07 $9.87M -$1.64M 13 2026-01-06
DYADIC INTERNATIONAL INC (DIL) Delisted President and CEO 4,166,987 — — $0 2 2019-04-12

Recent Filings

15 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-01-06 DYAI Grant (A) +102,609 $0 EDGAR
2025-12-29 DYAI Mixed — $0 EDGAR
2025-09-17 DYAI Buy (P) — $0 EDGAR
2025-01-07 DYAI Grant (A) +73,111 $0 EDGAR
2024-04-15 DYAI Grant (A) +124,454 $0 EDGAR
2024-01-04 DYAI Grant (A) — $0 EDGAR
2023-01-05 DYAI Grant (A) +138,478 $191.1K EDGAR
2022-01-05 DYAI Grant (A) — $0 EDGAR
2021-12-23 DYAI Mixed +59,098 -$135.0K EDGAR
2021-06-09 DYAI Mixed +3,000 -$207.0K EDGAR
Showing 1–10 of 15
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.