Diyong Xu

CIK 1995088 · View on SEC EDGAR ↗

Insider

First SEC filing: March 27, 2024 · Latest: June 16, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

QTTB buying May 28, 2026

Insider transactions

2 buys (P) 0 sells (S) Net: $15,000,000 + 6 non-open-market transactions below Avg return of open purchases vs now: 97.1% 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

6 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 12, 2026	QTTB	A	10,826	—	—	10,826 Direct	—	Acquired	(price as of 2026-08-20)
June 12, 2026	QTTB	A	9,810	—	—	9,810 Direct	—	Acquired	(price as of 2026-08-20)
May 28, 2026	QTTB	P	625,000	$8.00	$5,000,000	625,000 Indirect	—	Acquired	97.1% (price as of 2026-08-20)
May 28, 2026	QTTB	P	1,250,000	$8.00	$10,000,000	3,502,987 Indirect	+55.48%	Acquired	97.1% (price as of 2026-08-20)
Oct. 23, 2025	QTTB	A	53,521	—	—	53,521 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 24, 2025	QTTB	A	12,767	—	—	12,767 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 24, 2025	QTTB	D	12,767	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 25, 2024	QTTB	A	12,767	—	—	12,767 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.

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
June 12, 2026	QTTB	Stock Option (Right to Buy)	Common Stock	$12.64	June 11, 2036	10,826	Acquired
June 12, 2026	QTTB	Stock Option (Right to Buy)	Common Stock (9,810)	$12.64	June 11, 2036	9,810	Acquired
Oct. 23, 2025	QTTB	Stock Option (Right to Buy)	Common Stock (53,521)	$2.80	Oct. 22, 2035	53,521	Acquired
Feb. 24, 2025	QTTB	Stock Option (Right to Buy)	Common Stock (12,767)	—	March 24, 2034	12,767	Acquired
Feb. 24, 2025	QTTB	Stock Option (Right to Buy)	Common Stock (12,767)	$16.82	March 24, 2034	12,767	Disposed
March 25, 2024	QTTB	Stock Option (Right to Buy)	Common Stock (12,767)	$16.82	March 24, 2034	12,767	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
March 27, 2024	QTTB	Common Stock	2,252,987	Indirect