John D. Diekman

Activist

First SEC filing: Dec. 16, 2025 · Latest: Dec. 16, 2025

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 5 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

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

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 17, 2026	ZLAB	A	22,371	—	—	122,140 Direct	+22.42%	Acquired	(price as of 2026-08-21)
June 18, 2025	ZLAB	A	10,831	—	—	99,769 Direct	+12.18%	Acquired	(price as of 2026-08-21)
June 18, 2024	ZLAB	A	21,253	—	—	88,938 Direct	+31.40%	Acquired	(price as of 2026-08-21)
June 29, 2023	ZLAB	A	18,903	$26.45	$499,984	86,518 Direct	+27.96%	Acquired	-1.7% (price as of 2026-08-21)
Jan. 15, 2021	ZLAB	A	3,852	—	—	63,852 Direct	+6.42%	Acquired	(price as of 2026-08-21)

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.

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

Date	Ticker	Security	Shares	Ownership
Jan. 4, 2021	ZLAB	Ordinary Shares	60,000	Direct
May 22, 2019	IDYA	Common Stock	304,200	Indirect
May 22, 2019	IDYA	Common Stock	12,675	Indirect
May 22, 2019	IDYA	Series A Preferred Stock→ Common Stock	—	Indirect
May 22, 2019	IDYA	Series A Preferred Stock→ Common Stock	—	Indirect
May 22, 2019	IDYA	Series B Preferred Stock→ Common Stock	—	Indirect
May 22, 2019	IDYA	Series B Preferred Stock→ Common Stock	—	Indirect