Jianfeng Wu

Insider

First SEC filing: March 18, 2026 · Latest: March 18, 2026

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 1 non-open-market transaction below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 15, 2026	ATAT	A	360,000	—	—	360,000 Direct	—	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
July 15, 2026	ATAT	Employee Stock Options (Right to buy)	Class A Ordinary Shares (360,000)	$5.13	July 14, 2036	360,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
March 18, 2026	ATAT	American Depositary Shares	—	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (75,000)	75,000	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (75,000)	75,000	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (75,000)	75,000	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (355,000)	355,000	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (3,377)	3,377	Direct
March 18, 2026	ATAT	Employee Stock Options (Right to buy)→ Class A Ordinary Shares (2,252)	2,252	Direct