CBU insider transaction filings

COMMUNITY FINANCIAL SYSTEM, INC. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-18. Screen CBU transaction legs live →

Insider transaction summary — last 90 days

2026-06-24 to 2026-09-22, from the filings listed below: 6 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.

By insider — same window

Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.

InsiderFilingsPurchases (P)Sales (S)Other legs
Bolus Mark J. — Director11 leg · 12,191 sh · $816,786
Hall Brenda M — Director11 leg · 476 sh · $30,271
Singh Savneet — Director11 leg · 400 sh · $24,988
Vaccaro John A — Director21 leg · 317 sh · $20,0061
Sullivan Michele — Director11

Recent Form 4 filings — COMMUNITY FINANCIAL SYSTEM, INC.

FiledFormInsiderReported transactionsSource
2026-09-184Vaccaro John A — DirectorGrant/award (A): 346.50 (derivative) @ $62.77EDGAR
2026-09-184Sullivan Michele — DirectorGrant/award (A): 396.29 (derivative) @ $62.77EDGAR
2026-09-104Singh Savneet — DirectorPurchase (P): 400 @ $62.47EDGAR
2026-08-284Vaccaro John A — DirectorPurchase (P): 317 @ $63.11EDGAR
2026-08-264Hall Brenda M — DirectorPurchase (P): 476 @ $63.59EDGAR
2026-06-294Bolus Mark J. — DirectorSale (S): 12,190.83 @ $67EDGAR
2026-06-184Vaccaro John A — DirectorGrant/award (A): 320.46 (derivative) @ $61.24EDGAR
2026-06-184Sullivan Michele — DirectorGrant/award (A): 406.19 (derivative) @ $61.24EDGAR
2026-06-114Durkee Deresa Fischer — SVP, Chief Accounting OfficerOption exercise (M): 427 @ $51.64 · Option exercise (M): 1,196 @ $44.27 · Tax withholding (F): 1,326 @ $64.77 · Option exercise (M): 427 (derivative) @ $0 · Option exercise (M): 1,196 (derivative) @ $0EDGAR
2026-06-104STICKELS ERIC — DirectorSale (S): 2,000 @ $63.98EDGAR
2026-05-054Wlos Marya Burgio — EVP & Chief Financial OfficerTax withholding (F): 273 @ $63.62EDGAR
2026-05-014Knauss Jeffery J — DirectorOption exercise (M): 9 · Option exercise (M): 9 (derivative)EDGAR
2026-05-014Parente John — DirectorOption exercise (M): 9 · Option exercise (M): 9 (derivative)EDGAR
2026-05-014Pecor Raymond C III — DirectorOption exercise (M): 9 · Option exercise (M): 9 (derivative)EDGAR
2026-05-014STEELE SALLY A — DirectorOption exercise (M): 9 · Option exercise (M): 9 (derivative)EDGAR
2026-03-234Knauss Jeffery J — DirectorOption exercise (M): 1,254 · Option exercise (M): 1,254 (derivative)EDGAR
2026-03-234Parente John — DirectorOption exercise (M): 1,254 · Option exercise (M): 1,254 (derivative)EDGAR
2026-03-234Pecor Raymond C III — DirectorOption exercise (M): 1,254 · Option exercise (M): 1,254 (derivative)EDGAR
2026-03-234STEELE SALLY A — DirectorOption exercise (M): 1,254 · Option exercise (M): 1,254 (derivative)EDGAR
2026-03-194Vaccaro John A — DirectorGrant/award (A): 314.69 (derivative) @ $55.61EDGAR
2026-03-194Wlos Marya Burgio — EVP & Chief Financial OfficerGrant/award (A): 1,571 (derivative) @ $0 · Grant/award (A): 6,004 (derivative) @ $0EDGAR
2026-03-194Sullivan Michele — DirectorGrant/award (A): 447.31 (derivative) @ $55.61EDGAR
2026-03-194Abdo Michael N — EVP and General CounselGrant/award (A): 1,373 (derivative) @ $0 · Grant/award (A): 5,246 (derivative) @ $0EDGAR
2026-03-194Knauss Jeffery J — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-194Karaivanov Dimitar — President & CEO, DirectorGrant/award (A): 6,277 (derivative) @ $0 · Grant/award (A): 23,984 (derivative) @ $0EDGAR
2026-03-194Durkee Matthew K — SVP, Chief Banking OfficerGrant/award (A): 1,449 (derivative) @ $0 · Grant/award (A): 5,537 (derivative) @ $0EDGAR
2026-03-194Gillan-Myer Maureen A — EVP, Chief Admin & HR OfficerGrant/award (A): 1,275 (derivative) @ $0 · Grant/award (A): 4,871 (derivative) @ $0EDGAR
2026-03-194Durkee Deresa Fischer — SVP, Chief Accounting OfficerGrant/award (A): 1,812 (derivative) @ $0EDGAR
2026-03-194Bolus Mark J. — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-194Fesette Neil E. — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-194Pecor Raymond C III — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Vaccaro John A — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Sullivan Michele — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Hall Brenda M — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184MacPherson Kerrie D. — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Singh Savneet — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Parente John — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184Whipple John F. — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184STEELE SALLY A — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-184STICKELS ERIC — DirectorGrant/award (A): 1,220 (derivative) @ $0EDGAR
2026-03-174STICKELS ERIC — DirectorOption exercise (M): 250 · Option exercise (M): 250 (derivative)EDGAR
2026-03-064Abdo Michael N — EVP and General CounselGrant/award (A): 1,948.24 @ $0 · Tax withholding (F): 707.24 @ $59.87EDGAR
2026-03-064Karaivanov Dimitar — President & CEO, DirectorGrant/award (A): 5,224.21 @ $0 · Tax withholding (F): 2,825.21 @ $59.87EDGAR
2026-03-064Gillan-Myer Maureen A — EVP, Chief Admin & HR OfficerGrant/award (A): 2,562.06 @ $0 · Tax withholding (F): 943.06 @ $59.87EDGAR
2026-03-044Abdo Michael N — EVP and General CounselTax withholding (F): 485 @ $60.55EDGAR
2026-03-044Karaivanov Dimitar — President & CEO, DirectorTax withholding (F): 2,501 @ $60.55EDGAR
2026-03-044Durkee Matthew K — SVP, Chief Banking OfficerTax withholding (F): 399 @ $60.55EDGAR
2026-03-044Gillan-Myer Maureen A — EVP, Chief Admin & HR OfficerTax withholding (F): 522 @ $60.55EDGAR
2026-03-044Gillan-Myer Maureen A — EVP, Chief Admin & HR OfficerSale (S): 3,450.36 @ $58.85EDGAR
2026-03-044Durkee Deresa Fischer — SVP, Chief Accounting OfficerTax withholding (F): 357 @ $60.55EDGAR

Recent 8-K events — COMMUNITY FINANCIAL SYSTEM, INC.

FiledFormItems reportedSource
2026-08-218-K7.01 — Regulation FD DisclosureEDGAR
2026-07-288-K2.02 — Results of Operations and Financial Condition
9.01 — Financial Statements and Exhibits
EDGAR
2026-06-018-K8.01 — Other Events
9.01 — Financial Statements and Exhibits
EDGAR
2026-05-228-K5.07 — Submission of Matters to a Vote of Security HoldersEDGAR
2026-05-138-K7.01 — Regulation FD DisclosureEDGAR
2026-04-298-K2.02 — Results of Operations and Financial Condition
9.01 — Financial Statements and Exhibits
EDGAR
2026-02-118-K7.01 — Regulation FD DisclosureEDGAR
2026-02-118-K5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers
9.01 — Financial Statements and Exhibits
EDGAR
2026-01-278-K2.02 — Results of Operations and Financial Condition
9.01 — Financial Statements and Exhibits
EDGAR
2026-01-158-K7.01 — Regulation FD Disclosure
8.01 — Other Events
9.01 — Financial Statements and Exhibits
EDGAR
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