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William D Clark

CIK 1355415 · President and CEO · last filed 2026-06-11

William D Clark is a President and CEO who has filed 49 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for ALDX, was dated Jun 11, 2026. Across all open-market trades the lifetime net is −$2.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $870.9K 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

$870.9K

Companies

5

Total Filings

49

Lifetime Open-Market Net

-$2.75M

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
ALDX Director — $1.58 — $0 2 2026-06-11
IBIO Director 1,838 $1.39 $2.6K $5.0K 5 2025-11-24
GENOCEA BIOSCIENCES, INC. (GNCA) Delisted President and CEO 304,377 $0.00 $183 $39.1K 22 2022-06-03
X4 Pharmaceuticals, Inc (ASNS) Delisted Director — $0.08 — $0 3 2018-06-07
VNDA Sr. VP, Chief Business Officer 168,279 $5.16 $868.3K -$2.80M 17 2010-02-23

Recent Filings

49 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
2026-06-11 ALDX Grant (A) — $0 EDGAR
2025-11-24 IBIO Grant (A) — $0 EDGAR
2025-04-18 ALDX Grant (A) — $0 EDGAR
2025-01-13 IBIO Buy (P) +1,838 $5.0K EDGAR
2024-11-25 IBIO Grant (A) — $0 EDGAR
2022-06-03 GENOCEA BIOSCIENCES, INC. (GNCA) Delisted Sell (S) −4,023 -$241 EDGAR
2022-06-02 GENOCEA BIOSCIENCES, INC. (GNCA) Delisted Sell (S) −117,244 -$7.2K EDGAR
2022-04-05 GENOCEA BIOSCIENCES, INC. (GNCA) Delisted Sell (S) −3,924 -$4.9K EDGAR
2022-03-17 GENOCEA BIOSCIENCES, INC. (GNCA) Delisted Mixed +138,565 -$12.6K EDGAR
2021-12-13 IBIO Grant (A) — $0 EDGAR
Showing 1–10 of 49
Page 1 of 5
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.