John S. Montalbano

Insider

First SEC filing: Dec. 11, 2020 · Latest: June 12, 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

ABCL buying Aug. 18, 2026

Insider transactions

1 buys (P) 0 sells (S) Net: $110,300 + 5 non-open-market transactions below Avg return of open purchases vs now: 3.4% 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

5 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 18, 2026	ABCL	P	10,000	$11.03	$110,300	251,000 Direct	+4.15%	Acquired	3.4% (price as of 2026-08-21)
June 11, 2026	ABCL	A	111,701	—	—	1,141,544 Direct	+10.85%	Acquired	(price as of 2026-08-21)
Dec. 1, 2022	ABCL	A	47,231	—	—	627,045 Direct	+8.15%	Acquired	(price as of 2026-08-21)
March 4, 2022	ABCL	P	10,000	$8.54	$85,400	56,000 Direct	+21.74%	Acquired	33.5% (price as of 2026-08-21)
March 1, 2022	ABCL	P	20,000	$9.05	$181,000	46,000 Direct	+76.92%	Acquired	26.0% (price as of 2026-08-21)
Dec. 7, 2021	ABCL	A	45,532	—	—	579,814 Direct	+8.52%	Acquired	(price as of 2026-08-21)
Aug. 27, 2021	ABCL	A	34,282	—	—	534,282 Direct	+6.86%	Acquired	(price as of 2026-08-21)
Aug. 16, 2021	ABCL	P	6,000	$17.23	$103,380	26,000 Direct	+30.00%	Acquired	-33.8% (price as of 2026-08-21)
Dec. 15, 2020	ABCL	P	5,000	$20.00	$100,000	5,000 Indirect	—	Acquired	-43.0% (price as of 2026-08-21)
Dec. 15, 2020	ABCL	P	20,000	$20.00	$400,000	20,000 Direct	—	Acquired	-43.0% (price as of 2026-08-21)
Nov. 18, 2020	ABCL	A	500,000	—	—	500,000 Direct	—	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.

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 11, 2026	ABCL	Share option (right to buy)	Common Shares (111,701)	$5.27	June 11, 2036	111,701	Acquired
Dec. 1, 2022	ABCL	Share option (right to buy)	Common Shares (47,231)	$13.18	Dec. 1, 2032	47,231	Acquired
Dec. 7, 2021	ABCL	Share option (right to buy)	Common Shares (45,532)	$14.55	Dec. 7, 2031	45,532	Acquired
Aug. 27, 2021	ABCL	Share option (right to buy)	Common Shares (34,282)	$17.58	Aug. 27, 2031	34,282	Acquired
Nov. 18, 2020	ABCL	Stock Option (right to buy)	Common Shares	—	Nov. 18, 2030	500,000	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
Dec. 11, 2020	ABCL	Stock Option (right to buy)→ Common Shares (500,000)	500,000	Direct