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WILLIAM F DOYLE

CIK 1194459 · Executive Chairman · last filed 2026-05-29

WILLIAM F DOYLE is an Executive Chairman who has filed 73 SEC Form 4 insider transactions across 7 companies since 2015. The most recent filing, for PROK, was dated May 29, 2026. Across all open-market trades the lifetime net is −$72.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $16.1M across reported positions. 7 SEC filings were submitted jointly with Elanco Animal Health Inc.

"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

$16.08M

Companies

7

Total Filings

73

Lifetime Open-Market Net

-$72.50M

Filer Profile

Reported Address
180 HANOVER ST.
PORTSMOUTH, NH 08301
Related Filers
Elanco Animal Health Inc — 7 joint filings, latest 2024-12-03
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
PROK Director — $2.01 — $0 4 2026-05-29
NVCR Executive Chairman 766,564 $17.94 $13.75M -$73.23M 39 2026-03-05
ELAN Director 94,499 $24.50 $2.32M $499.2K 4 2024-12-03
Elanco Animal Health Inc (ELAT) Delisted Director 25,956 $21.32 $553.4K $0 2 2022-12-02
NERV Director 3,264 $4.43 $14.5K $223.0K 16 2022-06-28
OptiNose, Inc. (OPTN) Delisted Director 55,736 $9.60 $535.1K $0 5 2020-06-12
ZTS 0 $75.81 $0 $0 1 2016-05-12

Recent Filings

73 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
2026-05-29 PROK Grant (A) — $0 EDGAR
2026-03-05 NVCR Mixed +328,397 -$932.9K EDGAR
2026-03-03 NVCR Notice (144) −71,887 -$932.9K EDGAR
2025-06-02 PROK Grant (A) — $0 EDGAR
2024-12-03 ELAN Grant (A) +18,169 $0 EDGAR
2024-06-03 PROK Grant (A) — $0 EDGAR
2024-05-23 ELAN Buy (P) +15,000 $254.7K EDGAR
2024-03-12 ELAN Buy (P) +15,000 $244.5K EDGAR
2023-12-04 ELAN Grant (A) +20,374 $0 EDGAR
2023-07-03 PROK Grant (A) — $0 EDGAR
Showing 1–10 of 73
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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.