Glenn Grindstaff

Insider

First SEC filing: Feb. 25, 2020 · Latest: Feb. 25, 2020

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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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

OSIS selling Nov. 7, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 15 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

15 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 31, 2026	OSIS	A	610	$221.39	$135,048	9,932 Direct	+6.54%	Acquired	-0.9% (price as of 2026-08-20)
June 30, 2026	OSIS	A	17	$185.90	$3,160	9,322 Direct	+0.18%	Acquired	18.1% (price as of 2026-08-20)
Nov. 7, 2022	OSIS	S	802	$84.77	$67,986	5,693 Direct	-12.35%	Disposed	158.9% (price as of 2026-08-20)
Aug. 24, 2022	OSIS	A	1,518	—	—	7,039 Direct	+27.50%	Acquired	(price as of 2026-08-20)
Aug. 24, 2022	OSIS	F	544	$89.14	$48,492	6,495 Direct	-7.73%	Disposed	146.2% (price as of 2026-08-20)
July 6, 2022	OSIS	A	1,611	—	—	5,521 Direct	+41.20%	Acquired	(price as of 2026-08-20)
June 30, 2022	OSIS	A	19	$72.62	$1,380	3,910 Direct	+0.49%	Acquired	202.2% (price as of 2026-08-20)
June 24, 2022	OSIS	F	63	$84.39	$5,317	3,891 Direct	-1.59%	Disposed	160.1% (price as of 2026-08-20)
May 27, 2022	OSIS	S	47	$83.18	$3,909	3,954 Direct	-1.17%	Disposed	163.8% (price as of 2026-08-20)
Dec. 31, 2021	OSIS	A	30	$77.84	$2,335	4,001 Direct	+0.76%	Acquired	182.0% (price as of 2026-08-20)
Sept. 8, 2021	OSIS	S	355	$97.40	$34,577	3,971 Direct	-8.21%	Disposed	125.3% (price as of 2026-08-20)
Aug. 24, 2021	OSIS	F	307	$98.33	$30,187	4,326 Direct	-6.63%	Disposed	123.2% (price as of 2026-08-20)
Aug. 24, 2021	OSIS	A	898	—	—	4,633 Direct	+24.04%	Acquired	(price as of 2026-08-20)
July 8, 2021	OSIS	A	1,307	—	—	3,735 Direct	+53.83%	Acquired	(price as of 2026-08-20)
June 30, 2021	OSIS	A	17	$77.84	$1,323	2,428 Direct	+0.71%	Acquired	182.0% (price as of 2026-08-20)
June 24, 2021	OSIS	F	71	$97.72	$6,938	2,411 Direct	-2.86%	Disposed	124.6% (price as of 2026-08-20)
July 8, 2020	OSIS	A	1,792	—	—	2,482 Direct	+259.71%	Acquired	(price as of 2026-08-20)
June 24, 2020	OSIS	A	690	—	—	690 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.

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
Feb. 25, 2020	OSIS	No securities are beneficially owned.	0	Direct