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Tadataka Yamada

CIK 1402530 · last filed 2021-06-01

Tadataka Yamada is a corporate insider who has filed 34 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for ATHA, was dated Jun 1, 2021. Across all open-market trades the lifetime net is +$117.0K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $8.4M 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

$8.35M

Companies

6

Total Filings

34

Lifetime Open-Market Net

$117.0K

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
LeonaBio, Inc. (ATHA) Delisted Director — $6.92 — $0 1 2021-06-01
PASG Director 32,807 $4.57 $149.9K $117.0K 3 2021-05-28
PHAT Director — $11.66 — $0 2 2021-05-24
Prometheus Biosciences, Inc. (RXDX) Delisted Director 13,333 $199.92 $2.67M $0 1 2021-03-16
A Director 58,374 $140.54 $8.20M $0 12 2020-08-05
Covidien plc (COV) Delisted Director 13,056 — — $0 15 2011-03-17

Recent Filings

34 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
2021-06-01 LeonaBio, Inc. (ATHA) Delisted Grant (A) — $0 EDGAR
2021-05-28 PASG Grant (A) — $0 EDGAR
2021-05-24 PHAT Grant (A) — $0 EDGAR
2021-03-16 Prometheus Biosciences, Inc. (RXDX) Delisted Conv (C) +13,333 $0 EDGAR
2020-08-05 A Grant (A) +212 $19.9K EDGAR
2020-05-22 PHAT Grant (A) — $0 EDGAR
2020-04-21 A Grant (A) +4,313 $314.9K EDGAR
2020-03-03 PASG Buy (P) +6,500 $117.0K EDGAR
2020-03-02 PASG Grant (A) — $0 EDGAR
2019-03-22 A Grant (A) +4,328 $355.0K EDGAR
Showing 1–10 of 34
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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.