SEC Form 4
Community Financial System, Inc. (CBU) insider trading
In the 12 months to Oct 24, 2026, 5 CBU insiders reported open-market sales of $1.8M across 6 filings; 3 insiders bought $75.3K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $1.8M
- 6 filings · 5 insiders
- Open-market purchases
- $75.3K
- 3 filings
Who traded CBU, and when
- Purchase
- Sale
CBU daily close from Oct 24, 2025 to Oct 23, 2026, between $53.67 and $70.99, last $62.42. 6 sale and 3 purchase filings by 8 insiders, marked at their filing dates. Mark J. Bolus, Director: sold $816.8K across 1 filing, first filed Jun 29, 2026, last Jun 29, 2026. John F. Whipple, Director: sold $276.7K across 1 filing, first filed Feb 6, 2026, last Feb 6, 2026. Eric Stickels, Director: sold $257.5K across 2 filings, first filed Feb 5, 2026, last Jun 10, 2026. Sally A. Steele, Director: sold $256.5K across 1 filing, first filed Feb 5, 2026, last Feb 5, 2026. Maureen A. Gillan-Myer, EVP, Chief Admin & HR Officer: sold $203.1K across 1 filing, first filed Mar 4, 2026, last Mar 4, 2026. Brenda M. Hall, Director: bought $30.3K across 1 filing, first filed Aug 26, 2026, last Aug 26, 2026. Savneet Singh, Director: bought $25.0K across 1 filing, first filed Sep 10, 2026, last Sep 10, 2026. John A. Vaccaro, Director: bought $20.0K across 1 filing, first filed Aug 28, 2026, last Aug 28, 2026.
Largest mark · tap a row for others
Mark J. Bolus · Director
Sale $816,786
12,191 shares at $67.00 avg
Filed Jun 29, 2026 · traded Jun 25
Close on filing date $66.82
Mark J. Bolus · Director
Director
$816.8K soldJohn F. Whipple · Director
Director
$276.7K soldEric Stickels · Director
Director
$257.5K soldSally A. Steele · Director
Director
$256.5K soldMaureen A. Gillan-Myer · EVP, Chief Admin & HR Officer
EVP, Chief Admin & HR Officer
$203.1K soldBrenda M. Hall · Director
Director
$30.3K boughtSavneet Singh · Director
Director
$25.0K boughtJohn A. Vaccaro · Director
Director
$20.0K boughtHas Community Financial System, Inc.'s CEO sold stock?
No. Dimitar Karaivanov (CEO) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
9 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Mark J. Bolus | Director | $816.8K | — | 1 | — | |
| John F. Whipple | Director | $276.7K | — | 1 | — | |
| Eric Stickels | Director | $257.5K | — | 2 | — | |
| Sally A. Steele | Director | $256.5K | — | 1 | — | |
| Maureen A. Gillan-Myer | EVP, Chief Admin & HR Officer | $203.1K | — | 1 | — | |
| Brenda M. Hall | Director | — | $30.3K | 1 | — | |
| Savneet Singh | Director | — | $25.0K | 1 | — | |
| John A. Vaccaro | Director | — | $20.0K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Savneet Singh Director | Purchase | 400 | $62.47 | $25.0K | 418 | |
traded | John A. Vaccaro Director | Purchase | 317 | $63.11 | $20.0K | 492 | |
traded | Brenda M. Hall Director | Purchase | 476 | $63.59 | $30.3K | 515 | |
traded | Mark J. Bolus Director | Sale | 12,191 | $67.00 | $816.8K | 94,060 | |
traded | Eric Stickels Director | Sale | 2,000 | $63.98 | $128.0K | 31,592 | |
traded | Maureen A. Gillan-Myer EVP, Chief Admin & HR Officer | Sale | 3,450 | $58.85 | $203.1K | 0 | |
traded | John F. Whipple Director | Sale | 4,246 | $65.17 | $276.7K | 8,506 | |
traded | Eric Stickels Director | Sale | 2,000 | $64.75 | $129.5K | 33,342 | |
traded | Sally A. Steele Director | Sale | 4,000 | $64.12 | $256.5K | 39,964 |
GET /stocks/filings/vX/form-4?tickers=CBU&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"CBU"
],
"issuer_cik": "0000723188",
"owner_cik": "0001738659",
"accession_number": "0000723188-26-000110",
"form_type": "4",
"filing_date": "2026-09-10",
"period_of_report": "2026-09-09",
"issuer_name": "COMMUNITY FINANCIAL SYSTEM, INC.",
"issuer_trading_symbol": "CBU",
"owner_name": "Singh Savneet",
"is_director": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-09",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 400,
"transaction_price_per_share": 62.47,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 418,
"transaction_value": 24988,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $62.41 to $62.53, inclusive. The reporting person undertakes to provide Community Financial System, Inc., any security holder of Community Financial System, Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote."
}
]
},
{
"tickers": [
"CBU"
],
"issuer_cik": "0000723188",
"owner_cik": "0002090100",
"accession_number": "0000723188-26-000108",
"form_type": "4",
"filing_date": "2026-08-28",
"period_of_report": "2026-08-27",
"issuer_name": "COMMUNITY FINANCIAL SYSTEM, INC.",
"issuer_trading_symbol": "CBU",
"owner_name": "Vaccaro John A",
"is_director": true,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-08-27",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 317,
"transaction_price_per_share": 63.11,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 492,
"transaction_value": 20005.87,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 31 records
- Option exercises16 records
- Tax withholding12 records
- Grants and awards3 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for CBU every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.