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ERICH PLATZER

CIK 1275087 · last filed 2026-07-01

ERICH PLATZER is a corporate insider who has filed 12 SEC Form 4 insider transactions across 1 company since 2019. Across all open-market trades the lifetime net is +$541.9K, making them a net buyer over the disclosed history.

"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

$0

Companies

1

Total Filings

12

Lifetime Open-Market Net

$541.9K

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
Aptose Biosciences Inc. (APTO) Delisted Director 1,078 $1.71 $1.8K $541.9K 11 2024-02-07

Recent Filings

12 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
2026-07-01 — Disp (D) −1,122 -$1.9K
2024-02-07 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2023-01-23 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2022-01-20 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2021-12-20 Aptose Biosciences Inc. (APTO) Delisted Buy (P) +100,000 $137.9K EDGAR
2021-12-17 Aptose Biosciences Inc. (APTO) Delisted Buy (P) +270,000 $316.3K EDGAR
2021-01-06 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2020-03-13 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2020-02-03 Aptose Biosciences Inc. (APTO) Delisted Grant (A) — $0 EDGAR
2019-03-21 Aptose Biosciences Inc. (APTO) Delisted Buy (P) +20,000 $43.8K EDGAR
Showing 1–10 of 12
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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.