Home

STEPHEN GEORGE DILLY

CIK 1389147 · See Remarks · last filed 2026-06-18

STEPHEN GEORGE DILLY is a corporate insider who has filed 48 SEC Form 4 insider transactions across 6 companies since 2007. The most recent filing, for CDXS, was dated Jun 18, 2026. Across all open-market trades the lifetime net is −$21.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $9.4M 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.

Loading insider history…
Disclosed Exposure

$9.39M

Companies

6

Total Filings

48

Lifetime Open-Market Net

-$21.65M

Filer Profile

Reported Address
C/O SIERRA ONCOLOGY, INC.
1820 GATEWAY DRIVE, SUITE 110
SAN MATEO, CA 94404
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
CDXS See Remarks 727,053 $1.35 $981.5K -$151.3K 11 2026-06-18
Sierra Oncology, Inc. (SRRA) Delisted CEO and President 0 $54.99 $0 $89.1K 7 2022-07-01
SANGAMO THERAPEUTICS, INC (SGMO) Delisted Director 15,000 $0.18 $2.7K -$300.3K 13 2020-06-03
COLL President and CEO 370,297 $22.70 $8.41M -$21.29M 12 2018-06-13
Aimmune Therapeutics, Inc. (AIMT) Delisted See Remarks 831,158 — — $0 1 2016-02-26
AVIGEN INC \DE (AVGN) Delisted Director — — — $0 4 2009-12-21

Recent Filings

48 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
2026-06-18 CDXS Grant (A) — $0 EDGAR
2025-11-12 CDXS Grant (A) +50,000 $92.4K EDGAR
2025-02-07 CDXS Grant (A) +88,750 $0 EDGAR
2024-01-02 CDXS Grant (A) +143,425 $0 EDGAR
2023-09-12 CDXS Buy (P) +58,479 $101.0K EDGAR
2023-03-09 CDXS Mixed +233,925 -$252.2K EDGAR
2023-02-21 CDXS Grant (A) +112,500 $0 EDGAR
2022-08-03 CDXS Grant (A) — $0 EDGAR
2022-07-01 Sierra Oncology, Inc. (SRRA) Delisted Disp (D) −5,000 -$275.0K EDGAR
2022-06-17 Sierra Oncology, Inc. (SRRA) Delisted Grant (A) — $0 EDGAR
Showing 1–10 of 48
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.