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Wayne Foster

CIK 1709769 · EVP, Chief Accounting Officer · last filed 2026-02-03

Wayne Foster is an EVP, Chief Accounting Officer who has filed 11 SEC Form 4 insider transactions across 2 companies since 2018. The most recent filing, for AVIR, was dated Feb 3, 2026. Across all open-market trades the lifetime net is −$47.9K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $406.6K 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

$406.6K

Companies

2

Total Filings

11

Lifetime Open-Market Net

-$47.9K

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
AVIR EVP, Chief Accounting Officer 79,329 $5.12 $406.6K -$47.9K 7 2026-02-03
Mersana Therapeutics, Inc. (MRSN) Delisted Vice President of Finance 2,613 $29.08 $76.0K $0 3 2019-01-25

Recent Filings

11 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
2026-02-03 AVIR Mixed +29,201 -$51.4K EDGAR
2025-02-04 AVIR Mixed +29,271 -$36.9K EDGAR
2024-02-02 AVIR Mixed +20,857 -$47.9K EDGAR
2024-02-01 AVIR Notice (144) −14,311 -$58.2K EDGAR
2023-02-02 AVIR Grant (A) — $0 EDGAR
2022-02-02 AVIR Grant (A) — $0 EDGAR
2021-02-01 AVIR Grant (A) — $0 EDGAR
2020-10-30 AVIR Grant (A) — $0 EDGAR
2019-01-25 Mersana Therapeutics, Inc. (MRSN) Delisted Grant (A) — $0 EDGAR
2018-02-06 Mersana Therapeutics, Inc. (MRSN) Delisted Grant (A) — $0 EDGAR
Showing 1–10 of 11
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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.