GRINSTEIN KEITH

Insider

First SEC filing: Nov. 22, 2004 · Latest: Nov. 22, 2004

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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 + 37 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

37 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 11, 2008	FFIV	A	10,215	—	—	10,215 Direct	—	Acquired	(price as of 2026-08-18)
March 10, 2008	FFIV	M	5,412	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-18)
March 10, 2008	FFIV	M	5,412	—	—	32,412 Direct	+20.04%	Acquired	(price as of 2026-08-18)
Feb. 1, 2008	TBI	A	8,418	—	—	20,889 Direct	+67.50%	Acquired	(price as of 2026-08-18)
March 22, 2007	FFIV	M	2,706	—	—	2,706 Direct	—	Acquired	(price as of 2026-08-18)
March 21, 2007	FFIV	M	5,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-18)
March 21, 2007	FFIV	M	5,000	—	—	13,500 Direct	+58.82%	Acquired	(price as of 2026-08-18)
Feb. 7, 2007	FFIV	M	5,000	$28.10	$140,500	5,000 Direct	-50.00%	Disposed	2713.4% (price as of 2026-08-18)
Feb. 7, 2007	FFIV	S	5,000	$73.00	$365,000	8,500 Direct	-37.04%	Disposed	983.0% (price as of 2026-08-18)
Feb. 7, 2007	FFIV	M	5,000	$28.10	$140,500	13,500 Direct	+58.82%	Acquired	2713.4% (price as of 2026-08-18)
Feb. 2, 2007	TBI	A	6,586	—	—	12,471 Direct	+111.91%	Acquired	(price as of 2026-08-18)
March 2, 2006	FFIV	A	5,000	—	—	5,000 Direct	—	Acquired	(price as of 2026-08-18)
March 2, 2006	FFIV	M	2,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-18)
March 2, 2006	FFIV	M	2,500	—	—	8,500 Direct	+41.67%	Acquired	(price as of 2026-08-18)
Jan. 3, 2006	TBI	A	5,885	—	—	5,885 Direct	—	Acquired	(price as of 2026-08-18)
Dec. 13, 2005	FFIV	M	5,000	$28.10	$140,500	5,000 Direct	-50.00%	Disposed	2713.4% (price as of 2026-08-18)
Dec. 13, 2005	FFIV	S	5,000	$52.57	$262,850	6,000 Direct	-45.45%	Disposed	1403.8% (price as of 2026-08-18)
Dec. 13, 2005	FFIV	M	5,000	$28.10	$140,500	11,000 Direct	+83.33%	Acquired	2713.4% (price as of 2026-08-18)
Nov. 17, 2005	FFIV	M	5,000	$28.10	$140,500	10,000 Direct	-33.33%	Disposed	2713.4% (price as of 2026-08-18)
Nov. 17, 2005	FFIV	S	5,000	$54.50	$272,500	6,000 Direct	-45.45%	Disposed	1350.6% (price as of 2026-08-18)
Nov. 17, 2005	FFIV	M	5,000	$28.10	$140,500	11,000 Direct	+83.33%	Acquired	2713.4% (price as of 2026-08-18)
Sept. 14, 2005	FFIV	M	15,000	$12.79	$191,850	0 Direct	-100.00%	Disposed	6081.1% (price as of 2026-08-18)
Sept. 14, 2005	FFIV	S	15,000	$43.65	$654,750	6,000 Direct	-71.43%	Disposed	1711.1% (price as of 2026-08-18)
Sept. 14, 2005	FFIV	M	15,000	$12.79	$191,850	21,000 Direct	+250.00%	Acquired	6081.1% (price as of 2026-08-18)
Aug. 1, 2005	FFIV	A	2,500	—	—	2,500 Direct	—	Acquired	(price as of 2026-08-18)
May 31, 2005	FFIV	M	10,000	$11.12	$111,200	0 Direct	-100.00%	Disposed	7009.4% (price as of 2026-08-18)
May 31, 2005	FFIV	S	10,000	$50.75	$507,500	6,000 Direct	-62.50%	Disposed	1457.8% (price as of 2026-08-18)
May 31, 2005	FFIV	M	10,000	$11.12	$111,200	16,000 Direct	+166.67%	Acquired	7009.4% (price as of 2026-08-18)
Feb. 25, 2005	FFIV	M	5,000	$11.12	$55,600	10,000 Direct	-33.33%	Disposed	7009.4% (price as of 2026-08-18)
Feb. 25, 2005	FFIV	S	5,000	$54.45	$272,250	6,000 Direct	-45.45%	Disposed	1351.9% (price as of 2026-08-18)
Feb. 25, 2005	FFIV	M	5,000	$11.12	$55,600	11,000 Direct	+83.33%	Acquired	7009.4% (price as of 2026-08-18)
Feb. 24, 2005	FFIV	A	7,500	$53.73	$402,975	7,500 Direct	—	Acquired	1371.4% (price as of 2026-08-18)
Feb. 10, 2005	FFIV	M	2,500	$9.50	$23,750	0 Direct	-100.00%	Disposed	8221.7% (price as of 2026-08-18)
Feb. 10, 2005	FFIV	S	2,500	$50.21	$125,525	6,000 Direct	-29.41%	Disposed	1474.5% (price as of 2026-08-18)
Feb. 10, 2005	FFIV	M	2,500	$9.50	$23,750	8,500 Direct	+41.67%	Acquired	8221.7% (price as of 2026-08-18)
Jan. 27, 2005	FFIV	M	5,000	$9.50	$47,500	2,500 Direct	-66.67%	Disposed	8221.7% (price as of 2026-08-18)
Jan. 27, 2005	FFIV	S	5,000	$48.25	$241,250	6,000 Direct	-45.45%	Disposed	1538.5% (price as of 2026-08-18)
Jan. 27, 2005	FFIV	M	5,000	$9.50	$47,500	11,000 Direct	+83.33%	Acquired	8221.7% (price as of 2026-08-18)
Jan. 3, 2005	TBI	A	5,000	$16.98	$84,900	5,000 Direct	—	Acquired	-41.0% (price as of 2026-08-18)
Nov. 16, 2004	TBI	A	2,000	$15.83	$31,660	2,000 Direct	—	Acquired	-36.8% (price as of 2026-08-18)
Oct. 29, 2004	FFIV	M	5,000	$8.10	$40,500	11,000 Direct	+83.33%	Acquired	9660.0% (price as of 2026-08-18)
Oct. 29, 2004	FFIV	S	5,000	$39.52	$197,600	6,000 Direct	-45.45%	Disposed	1900.4% (price as of 2026-08-18)
Oct. 29, 2004	FFIV	M	5,000	$8.10	$40,500	0 Direct	-100.00%	Disposed	9660.0% (price as of 2026-08-18)
April 29, 2004	FFIV	A	15,000	$28.10	$421,500	15,000 Direct	—	Acquired	2713.4% (price as of 2026-08-18)
Feb. 10, 2004	FFIV	M	10,000	$8.10	$81,000	5,000 Direct	-66.67%	Disposed	9660.0% (price as of 2026-08-18)
Feb. 10, 2004	FFIV	S	10,000	$35.38	$353,800	6,000 Direct	-62.50%	Disposed	2134.5% (price as of 2026-08-18)
Feb. 10, 2004	FFIV	M	10,000	$8.10	$81,000	16,000 Direct	+166.67%	Acquired	9660.0% (price as of 2026-08-18)

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
March 11, 2008	FFIV	Restricted Stock Units [F2]	Common Stock (10,215)	$0.00	March 11, 2018	10,215	Acquired
March 10, 2008	FFIV	Restricted Stock Units	Common Stock (5,412)	$0.00	March 22, 2017	5,412	Disposed
March 22, 2007	FFIV	Restricted Stock Units [F2]	Common Stock (2,706)	$0.00	March 22, 2017	2,706	Acquired
March 21, 2007	FFIV	Restricted Stock Units	Common Stock (5,000)	$0.00	March 2, 2016	5,000	Disposed
Feb. 7, 2007	FFIV	Non-Qualified Stock Options (right to buy)	Common Stock (5,000)	$28.10	April 29, 2014	5,000	Disposed
March 2, 2006	FFIV	Restricted Stock Units [F2]	Common Stock (5,000)	$0.00	March 2, 2016	5,000	Acquired
March 2, 2006	FFIV	Restricted Stock Units	Common Stock (2,500)	$0.00	Aug. 1, 2015	2,500	Disposed
Dec. 13, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (5,000)	$28.10	April 29, 2014	5,000	Disposed
Nov. 17, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (5,000)	$28.10	April 29, 2014	5,000	Disposed
Sept. 14, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (15,000)	$12.79	Feb. 13, 2013	15,000	Disposed
Aug. 1, 2005	FFIV	Restricted Stock Units [F1]	Common Stock (2,500)	$0.00	Aug. 1, 2015	2,500	Acquired
May 31, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (10,000)	$11.12	May 6, 2012	10,000	Disposed
Feb. 25, 2005	FFIV	Non-Qualified Stock Options (right to buy)	Common Stock (5,000)	$11.12	May 6, 2012	5,000	Disposed
Feb. 24, 2005	FFIV	Non-Qualified Stock Option (right to buy) [F1]	Common Stock (7,500)	$53.73	Feb. 24, 2015	7,500	Acquired
Feb. 10, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (2,500)	$9.50	Jan. 1, 2011	2,500	Disposed
Jan. 27, 2005	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (5,000)	$9.50	Jan. 1, 2011	5,000	Disposed
Jan. 3, 2005	TBI	Options (Right to buy)	Common stock (5,000)	$16.98	Jan. 3, 2015	5,000	Acquired
Nov. 16, 2004	TBI	Options (Right to buy)	Common stock (2,000)	$15.83	Nov. 16, 2014	2,000	Acquired
Oct. 29, 2004	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (5,000)	$8.10	April 20, 2011	5,000	Disposed
April 29, 2004	FFIV	Non-Qualified Stock Option (right to buy) [F1]	Common Stock (15,000)	$28.10	April 29, 2014	15,000	Acquired
Feb. 10, 2004	FFIV	Non-Qualified Stock Option (right to buy)	Common Stock (10,000)	$8.10	April 20, 2011	10,000	Disposed

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
Nov. 22, 2004	TBI	Common stock	0	Direct