Michelle M Plummer

Insider

First SEC filing: June 15, 2026 · Latest: June 15, 2026

On this page

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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

GCBC selling June 11, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-287,700 + 27 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

27 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 11, 2026	GCBC	S	10,000	$28.77	$287,700	99,560 Direct	-9.13%	Disposed	19.2% (price as of 2026-08-20)
June 8, 2018	GCBC	M	12,570	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 8, 2018	GCBC	M	12,570	$6.25	$78,562	65,940 Direct	+23.55%	Acquired	997.6% (price as of 2026-08-20)
June 8, 2018	GCBC	F	2,570	$29.95	$76,972	53,370 Direct	-4.59%	Disposed	129.0% (price as of 2026-08-20)
June 8, 2018	GCBC	M	12,570	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 8, 2018	GCBC	M	12,570	$6.25	$78,562	65,940 Direct	+23.55%	Acquired	997.6% (price as of 2026-08-20)
June 8, 2018	GCBC	F	2,570	$29.95	$76,972	53,370 Direct	-4.59%	Disposed	129.0% (price as of 2026-08-20)
Feb. 22, 2018	GCBC	M	12,000	$6.25	$75,000	56,140 Direct	+27.19%	Acquired	997.6% (price as of 2026-08-20)
Feb. 2, 2018	GCBC	M	12,000	—	—	12,570 Direct	-48.84%	Disposed	(price as of 2026-08-20)
Dec. 20, 2016	GCBC	M	10,000	—	—	24,570 Direct	-28.93%	Disposed	(price as of 2026-08-20)
Dec. 20, 2016	GCBC	M	10,000	$6.25	$62,500	44,140 Direct	+29.29%	Acquired	997.6% (price as of 2026-08-20)
March 15, 2016	GCBC	S	500	$35.00	$17,500	17,070 Direct	-2.85%	Disposed	292.0% (price as of 2026-08-20)
March 3, 2016	GCBC	S	1,900	$35.00	$66,500	17,570 Direct	-9.76%	Disposed	292.0% (price as of 2026-08-20)
Dec. 18, 2015	GCBC	M	3,000	—	—	17,285 Direct	-14.79%	Disposed	(price as of 2026-08-20)
Dec. 18, 2015	GCBC	M	3,000	$12.50	$37,500	19,470 Direct	+18.21%	Acquired	997.6% (price as of 2026-08-20)
Dec. 19, 2014	GCBC	M	2,000	—	—	20,285 Direct	-8.97%	Disposed	(price as of 2026-08-20)
Dec. 19, 2014	GCBC	M	2,000	$12.50	$25,000	16,470 Direct	+13.82%	Acquired	997.6% (price as of 2026-08-20)
Dec. 17, 2013	GCBC	M	715	—	—	22,285 Direct	-3.11%	Disposed	(price as of 2026-08-20)
Dec. 17, 2013	GCBC	S	715	$26.00	$18,590	15,350 Direct	-4.45%	Disposed	427.7% (price as of 2026-08-20)
Dec. 17, 2013	GCBC	M	715	$12.50	$8,938	16,015 Direct	+4.67%	Acquired	997.6% (price as of 2026-08-20)
Dec. 16, 2013	GCBC	M	1,000	—	—	23,000 Direct	-4.17%	Disposed	(price as of 2026-08-20)
Dec. 16, 2013	GCBC	S	1,000	$26.00	$26,000	15,350 Direct	-6.12%	Disposed	427.7% (price as of 2026-08-20)
Dec. 16, 2013	GCBC	M	1,000	$12.50	$12,500	16,350 Direct	+6.51%	Acquired	997.6% (price as of 2026-08-20)
Feb. 26, 2010	GCBC	M	4,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 26, 2010	GCBC	M	4,000	$3.94	$15,760	14,470 Direct	+38.20%	Acquired	3382.2% (price as of 2026-08-20)
Feb. 26, 2010	GCBC	F	1,050	$15.00	$15,750	10,470 Direct	-9.11%	Disposed	814.7% (price as of 2026-08-20)
Dec. 22, 2009	GCBC	M	5,000	—	—	4,000 Direct	-55.56%	Disposed	(price as of 2026-08-20)
Dec. 22, 2009	GCBC	M	5,000	$3.94	$19,700	11,520 Direct	+76.69%	Acquired	3382.2% (price as of 2026-08-20)
Dec. 22, 2009	GCBC	F	1,080	$14.59	$15,757	6,520 Direct	-14.21%	Disposed	840.4% (price as of 2026-08-20)
Aug. 19, 2008	GCBC	A	24,000	—	—	24,000 Direct	—	Acquired	(price as of 2026-08-20)
Dec. 5, 2007	GCBC	M	3,000	—	—	9,000 Direct	-25.00%	Disposed	(price as of 2026-08-20)
Dec. 5, 2007	GCBC	M	3,000	$3.94	$11,820	12,632 Direct	+31.15%	Acquired	3382.2% (price as of 2026-08-20)
Dec. 5, 2007	GCBC	S	1,000	$13.00	$13,000	9,632 Direct	-9.41%	Disposed	955.4% (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.

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 8, 2018	GCBC	Stock Options	Common Stock (12,570)	$6.25	Aug. 19, 2018	12,570	Disposed
June 8, 2018	GCBC	Stock Options	Common Stock (12,570)	$6.25	Aug. 19, 2018	12,570	Disposed
Feb. 2, 2018	GCBC	Stock Options	Common Stock (12,000)	$6.25	Aug. 19, 2018	12,000	Disposed
Dec. 20, 2016	GCBC	Stock Options	Common Stock	$6.25	Aug. 19, 2018	10,000	Disposed
Dec. 18, 2015	GCBC	Stock Options	Common Stock (3,000)	$12.50	Aug. 19, 2018	3,000	Disposed
Dec. 19, 2014	GCBC	Stock Options	Common Stock (2,000)	$12.50	Aug. 19, 2018	2,000	Disposed
Dec. 17, 2013	GCBC	Stock Options	Common Stock (715)	$12.50	Aug. 19, 2018	715	Disposed
Dec. 16, 2013	GCBC	Stock Options	Common Stock (1,000)	$12.50	Aug. 19, 2018	1,000	Disposed
Feb. 26, 2010	GCBC	Stock Options	Common Stock (4,000)	$3.94	March 28, 2010	4,000	Disposed
Dec. 22, 2009	GCBC	Stock Options	Common Stock (5,000)	$3.94	March 28, 2010	5,000	Disposed
Aug. 19, 2008	GCBC	Stock Options	Common Stock (24,000)	$12.50	Aug. 19, 2018	24,000	Acquired
Dec. 5, 2007	GCBC	Stock Options	Common Stock (3,000)	$3.94	March 28, 2010	3,000	Disposed

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

GCBC

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2013	$199,800	$85,500	—	—	—	—	$34,200	$319,500

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.