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Guy Macdonald

CIK 1296998 · President and Chief Executive · last filed 2025-06-30

Guy Macdonald is a President and Chief Executive who has filed 65 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for SCYX, was dated Jun 30, 2025. Across all open-market trades the lifetime net is −$7.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $35.4K 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

$35.4K

Companies

3

Total Filings

65

Lifetime Open-Market Net

-$7.67M

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
SCYX Director 9,750 $3.63 $35.4K $145.6K 33 2025-06-30
TETRAPHASE PHARMACEUTICALS INC (TTPH) Delisted President and Chief Executive 0 — — -$7.82M 30 2020-07-29
IDENIX PHARMACEUTICALS INC (IDIX) Delisted Executive VP, Operations — — — $0 2 2007-06-04

Recent Filings

65 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
2025-06-30 SCYX Grant (A) +23,000 $0 EDGAR
2024-06-21 SCYX Grant (A) +23,000 $0 EDGAR
2023-06-23 SCYX Grant (A) +10,000 $0 EDGAR
2023-06-20 SCYX Grant (A) — $0 EDGAR
2022-06-22 SCYX Grant (A) +10,000 $0 EDGAR
2021-06-21 SCYX Grant (A) — $0 EDGAR
2021-03-31 SCYX Grant (A) — $0 EDGAR
2020-12-23 SCYX Mixed +8,000 $50.0K EDGAR
2020-07-29 TETRAPHASE PHARMACEUTICALS INC (TTPH) Delisted U −15,703 $0 EDGAR
2020-07-08 SCYX Grant (A) — $0 EDGAR
Showing 1–10 of 65
Page 1 of 7
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.