Gerald M Ostrov

Insider

First SEC filing: Jan. 13, 2022 · Latest: Jan. 13, 2022

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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

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 18 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

18 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 1, 2026	ENTX	A	33,505	—	—	33,505 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 1, 2026	ENTX	A	28,721	—	—	75,657 Direct	+61.19%	Acquired	(price as of 2026-08-21)
Jan. 15, 2025	ENTX	A	28,509	—	—	28,509 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 15, 2025	ENTX	A	8,038	—	—	46,936 Direct	+20.66%	Acquired	(price as of 2026-08-21)
Oct. 2, 2024	ENTX	A	8,452	—	—	38,898 Direct	+27.76%	Acquired	(price as of 2026-08-21)
Aug. 27, 2024	ENTX	A	20,446	—	—	30,446 Direct	+204.46%	Acquired	(price as of 2026-08-21)
Jan. 1, 2024	ENTX	A	108,333	—	—	108,333 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 2, 2023	ENTX	A	89,041	—	—	89,041 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 13, 2022	ENTX	P	10,000	$2.74	$27,400	10,000 Direct	—	Acquired	19.0% (price as of 2026-08-21)
Jan. 1, 2022	ENTX	A	107,557	—	—	107,557 Direct	—	Acquired	(price as of 2026-08-21)
Jan. 1, 2022	ENTX	A	35,852	—	—	35,852 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 23, 2015	ORMP	A	22,178	—	—	24,896 Direct	+815.97%	Acquired	(price as of 2026-08-21)
Nov. 13, 2014	ORMP	A	2,718	—	—	2,718 Direct	—	Acquired	(price as of 2026-08-21)
May 22, 2014	OSUR	A	12,987	—	—	39,346 Direct	+49.27%	Acquired	(price as of 2026-08-21)
April 9, 2014	ORMP	A	13,094	—	—	13,094 Direct	—	Acquired	(price as of 2026-08-21)
May 14, 2013	OSUR	A	17,505	—	—	26,359 Direct	+197.71%	Acquired	(price as of 2026-08-21)
Dec. 20, 2012	ORMP	A	240,000	—	—	240,000 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 1, 2012	OSUR	A	8,854	—	—	8,854 Direct	—	Acquired	(price as of 2026-08-21)
Nov. 10, 2011	OSUR	A	40,000	—	—	40,000 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
Jan. 1, 2026	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (33,505)	$1.94	Jan. 1, 2036	33,505	Acquired
Jan. 15, 2025	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (28,509)	$2.28	Jan. 15, 2035	28,509	Acquired
Jan. 1, 2024	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (108,333)	$0.60	Jan. 1, 2034	108,333	Acquired
Jan. 2, 2023	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (89,041)	$0.73	Jan. 2, 2033	89,041	Acquired
Jan. 1, 2022	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (107,557)	$2.82	Jan. 1, 2032	107,557	Acquired
Jan. 1, 2022	ENTX	Stock Option (right to buy)	Ordinary Shares, par value NIS 0.0000769 per share (35,852)	$2.82	Jan. 1, 2032	35,852	Acquired
April 9, 2014	ORMP	Stock Option (right to buy)	Common Stock (13,094)	$12.45	April 9, 2024	13,094	Acquired
Dec. 20, 2012	ORMP	Stock Option (right to buy)	Common Stock (240,000)	$0.50	Dec. 19, 2022	240,000	Acquired
Nov. 10, 2011	OSUR	Non-Qual. Stock Options	Common Stock (40,000)	$8.62	Nov. 10, 2021	40,000	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
Jan. 13, 2022	ENTX	Stock Option (right to buy)→ Ordinary Shares, par value NIS 0.0000769 per share (33,638)	33,638	Direct