Stock Ownership/FISI

FINANCIAL INSTITUTIONS INC (FISI): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in FISI · Financials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
12
13F filers
Aggregate Value
$80.1M
Across holders
Last Price
$40.82
2026-08-24
Sector
Financials
GICS
Quarterly fund activity10 increased2 reduced4 exited
Full exits: Verition Fund Management LLC, BALYASNY ASSET MANAGEMENT LLC, MARSHALL WACE, LLP, Brevan Howard Capital Management LP
Institutional Holders of FISI
↗
12 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund835K$32.5M40.6%0.0%Reduced$-4.4MQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund457K$17.8M22.2%0.0%Added+$7.1MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund251K$9.8M12.2%0.0%Added$-20.3MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund194K$7.6M9.4%0.0%Added+$4.9MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund137K$5.3M6.7%0.0%Reduced$-2.6MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund85K$3.3M4.2%0.0%Added+$3.2MQ2 2026
Man Group plc
CIK 0001637460
Hedge Fund38K$1.5M1.8%0.0%Added+$297KQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund23K$912K1.1%0.0%Added+$240KQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund13K$497K0.6%0.0%Added—Q2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund11K$428K0.5%0.0%Added+$134KQ2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$32.5M· 40.6% of total· 0.0% port· 835K sh· $-4.4M QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$17.8M· 22.2% of total· 0.0% port· 457K sh· +$7.1M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$9.8M· 12.2% of total· 0.0% port· 251K sh· $-20.3M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$7.6M· 9.4% of total· 0.0% port· 194K sh· +$4.9M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$5.3M· 6.7% of total· 0.0% port· 137K sh· $-2.6M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$3.3M· 4.2% of total· 0.0% port· 85K sh· +$3.2M QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$1.5M· 1.8% of total· 0.0% port· 38K sh· +$297K QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$912K· 1.1% of total· 0.0% port· 23K sh· +$240K QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$497K· 0.6% of total· 0.0% port· 13K sh· — QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$428K· 0.5% of total· 0.0% port· 11K sh· +$134K QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$413K· 0.5% of total· 0.0% port· 11K sh· +$130K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$61K· 0.1% of total· 0.0% port· 2K sh· $-54K QoQ· Q2 2026
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