Wenzhao Lu

Insider

First SEC filing: Oct. 28, 2016 · Latest: Oct. 28, 2016

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 10 non-open-market transactions 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

10 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 29, 2026	CHGA	A	200,000	—	—	200,000 Direct	—	Acquired	(price as of 2026-08-20)
Aug. 5, 2022	CHGA	A	448,718	$0.78	$350,000	33,192,708 Direct	+1.37%	Acquired	-99.9% (price as of 2026-08-20)
July 25, 2022	CHGA	A	4,443,990	$0.65	$2,888,594	32,743,990 Direct	+15.70%	Acquired	-99.8% (price as of 2026-08-20)
July 25, 2022	CHGA	A	4,442,989	$0.65	$2,887,943	32,742,989 Direct	+15.70%	Acquired	-99.8% (price as of 2026-08-20)
July 18, 2022	CHGA	A	4,440,390	$0.65	$2,886,254	32,740,390 Direct	+15.69%	Acquired	-99.8% (price as of 2026-08-20)
Dec. 21, 2021	CHGA	A	2,400,000	$1.25	$3,000,000	28,300,000 Direct	+9.27%	Acquired	-99.9% (price as of 2026-08-20)
Dec. 21, 2021	CHGA	A	2,400,000	$1.25	$3,000,000	28,300,000 Direct	+9.27%	Acquired	-99.9% (price as of 2026-08-20)
Dec. 21, 2021	CHGA	A	2,400,000	$1.25	$3,000,000	28,300,000 Direct	+9.27%	Acquired	-99.9% (price as of 2026-08-20)
April 1, 2020	CHGA	P	645,161	$1.55	$1,000,000	2,645,161 Indirect	+32.26%	Acquired	-99.9% (price as of 2026-08-20)
June 7, 2019	CHGA	P	15,000	$1.84	$27,600	25,936,000 Direct	+0.06%	Acquired	-99.9% (price as of 2026-08-20)
June 6, 2019	CHGA	P	21,000	$2.03	$42,630	25,921,000 Direct	+0.08%	Acquired	-99.9% (price as of 2026-08-20)
April 18, 2019	CHGA	P	2,000,000	$1.00	$2,000,000	2,000,000 Indirect	-50.00%	Disposed	-99.9% (price as of 2026-08-20)
April 18, 2019	CHGA	A	2,000,000	$1.00	$2,000,000	27,900,000 Direct	-6.69%	Disposed	-99.9% (price as of 2026-08-20)
Jan. 3, 2019	CHGA	A	1,500,000	$2.00	$3,000,000	1,500,000 Direct	—	Acquired	-99.9% (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
June 29, 2026	CHGA	Options (right to buy)	Common Stock (200,000)	$0.28	June 29, 2029	200,000	Acquired
Jan. 3, 2019	CHGA	Stock Options	Common Stock (1,500,000)	$2.00	Jan. 2, 2024	1,500,000	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
Oct. 28, 2016	CHGA	Common Stock, $0.0001 par value per share	30,900,000	Direct