GCBC Greene County Bancorp, Inc.

NSC
$34.46

Greene County Bancorp, Inc. (GCBC) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Bullish Insiders bought more than they sold over this window — uncommon at any size.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 0 sellers in the last 90 days
Insiders buying
8
27 transactions
Insiders selling
1
1 transaction
Purchases
$647.9K
28,776 shares
Sales
$287.7K
10,000 shares
Net activity
$360.2K
purchases less sales

How much of that selling was preplanned? 0% planned / 100% discretionary

10b5-1 plan sales $0 0 transactions · 0 shares
Discretionary sales $287.7K 1 transaction · 10,000 shares

Largest single sale: $287.7K.

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: April 28, 2026 , by Brust John .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
PLUMMER MICHELLE M Director Sell 10,000 $28.77 $287.7K 99,560 −9.1% of holding
Brust John Director Buy 2,041 $24.50 $50.0K 6,221
Brust John 2 fills Director Buy 2,080 $24.05 $50.0K 4,180
Hada Tejraj S Director Buy 4,000 $21.95 $87.8K 35,427
Hogan Peter W. Director Buy 3,000 $22.10 $66.3K 75,000
Hada Tejraj S Director Buy 2,000 $21.99 $44.0K 31,427
Barzee Nick SVP and CFO Buy 1,280 $22.55 $28.9K 4,520
Cannucciari Christopher Director Buy 1,300 $22.05 $28.7K 4,378
Hada Tejraj S Director Buy 3,000 $21.96 $65.9K 27,923
Antalek John EVP and CLO Buy 1,500 $22.00 $33.0K 7,567
Hada Tejraj S Director Buy 366 $22.00 $8.1K 24,923
Hada Tejraj S Director Buy 1,500 $22.52 $33.8K 24,557
Hada Tejraj S Director Buy 45 $22.20 $999 23,057
Hada Tejraj S Director Buy 235 $21.80 $5.1K 23,012
Gibson Donald E 2 fills President and CEO Buy 1,000 $21.88 $21.9K 1,000
Cannucciari Christopher Director Buy 423 $22.79 $9.6K 3,078
Cannucciari Christopher Director Buy 706 $22.91 $16.2K 2,655
Cahalan Jay P. 9 fills Director Buy 4,300 $22.73 $97.7K 35,424

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.