Adaptimmune Therapeutics PLC (ADAP) IPO — S-1 Filing, Stock & Insider Activity

Adaptimmune Therapeutics PLC IPO — Status & S-1 Filing

Ticker: ADAP
Status: Registration withdrawn
Expected price range: not yet disclosed (set in a later S-1/A or pricing amendment)
SEC CIK: 0001621227 · View the S-1 on SEC EDGAR →

Adaptimmune Therapeutics PLC is pre-IPO, so no insider Form 4 transactions have been filed yet. Once insiders begin reporting trades after the offering, they will appear on this page automatically.

Track every registration update on the InsiderAlpha IPO tracker.

Updated Jul 16, 2026 · Last SEC filing 2025-09-02

Adaptimmune Therapeutics PLC (ADAP) — no SEC Form 4 insider filings recorded in the last 90 days. InsiderAlpha tracks every ADAP SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About Adaptimmune Therapeutics PLC (ADAP)

SEC CIK	0001621227

Recent ADAP Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2025-09-02	Wood Gavin	Chief Financial Officer	S — Open-market sale	96.0K	$0.01	$950	SEC
2025-08-28	Bertrand William C JR	Chief Operating Officer	S — Open-market sale	207.0K	$0.01	$2K	SEC
2025-08-18	Behbahani Ali	Insider	S — Open-market sale	14.67M	$0.01	$176K	SEC
2025-08-15	Behbahani Ali	Insider	S — Open-market sale	4.83M	$0.01	$53K	SEC
2025-07-30	EcoR1 Capital, LLC	10% Owner	S — Open-market sale	27.43M	$0.10	$2.80M	SEC
2025-07-29	EcoR1 Capital, LLC	10% Owner	S — Open-market sale	2.69M	$0.10	$272K	SEC
2025-07-28	EcoR1 Capital, LLC	10% Owner	S — Open-market sale	33.93M	$0.11	$3.82M	SEC

All transactions sourced from SEC EDGAR Form 4 filings for Adaptimmune Therapeutics PLC (ADAP). Updated in real time as new filings are submitted to the SEC.

Recent Insider Filings

2025-09-02 — Wood Gavin (Chief Financial Officer)
2025-08-28 — Bertrand William C JR (Chief Operating Officer)
2025-08-15 — Behbahani Ali (Insider)
2025-07-28 — EcoR1 Capital, LLC (10% Owner)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ADAP insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

ADAP Insider Trading — FAQ

What is the latest insider trade for ADAP?: Adaptimmune Therapeutics PLC (ADAP) had 0 insider filings in the last 90 days, with the most recent on 2025-09-02. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying ADAP stock?: 0 insider purchases of ADAP were filed in the last 90 days.
How many insiders are selling ADAP stock?: 0 insider sales of ADAP were filed in the last 90 days.
Where can I see ADAP SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every ADAP SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live ADAP dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.