Junwei Huo

CIK 2108294 · View on SEC EDGAR ↗

Insider

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

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Insider at

Insider transactions

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 10, 2026 ATHR A 25,000 25,000 Direct Acquired (price as of 2026-08-19)

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.

Derivative holdings (Form 4 Table II)

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

Date Ticker Security Underlying Exercise price Expiration Shares A/D
July 10, 2026 ATHR Nonqualified Stock Option (right to buy) Common Stock, par value $0.001 per share (25,000) $4.24 July 10, 2036 25,000 Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date Ticker Security Shares Ownership
March 18, 2026 AMBR Class A ordinary shares, par value $0.001 per share 13,430,558 Indirect
March 18, 2026 AMBR Class B ordinary shares, par value $0.001 per share→ Class A ordinary shares, par value $0.001 per share (6,996,638) 6,996,638 Indirect