Company · Ownership research

FINANCIAL INSTITUTIONS INC FISI

CIK 0000862831 · CUSIP 317585404

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 317585404 (FISI), not CUSIP 317585954 (FISI), CUSIP 317585904 (FISI), and does not merge CUSIPs.

This page lists the top 20 of 151 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	PL Capital Advisors, LLC CIK 1569147 · View history	$57.59M 1,816,102 shares	17.37%	+13.31K(+0.70%)Added	SEC filing ↗ May 7, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$46.87M 1,478,072 shares	0.00%	+16.57K(+1.10%)Added	SEC filing ↗ May 13, 2026	▾
03	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$30.37M 957,667 shares	0.01%	+1.76K(+0.20%)Added	SEC filing ↗ May 7, 2026	▾
04	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$30.08M 948,441 shares	0.05%	-23.60K(-2.40%)Reduced	SEC filing ↗ May 15, 2026	▾
05	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$28.55M 900,493 shares	0.01%	-148.80K(-14.20%)Reduced	SEC filing ↗ May 15, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$26.49M 835,538 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
07	STATE STREET CORP CIK 93751 · View history	$18.53M 579,119 shares	0.00%	+71.73K(+14.10%)Added	SEC filing ↗ May 15, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$18.04M 568,696 shares	0.00%	+86.54K(+17.90%)Added	SEC filing ↗ May 15, 2026	▾
09	Ategra Capital Management, LLC CIK 1741369 · View history	$17.89M 564,100 shares	9.96%	-7.97K(-1.40%)Reduced	SEC filing ↗ May 15, 2026	▾
10	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$17.58M 554,604 shares	0.02%	+128.57K(+30.20%)Added	SEC filing ↗ May 13, 2026	▾
11	RAYMOND JAMES FINANCIAL INC CIK 720005 · View history	$11.07M 349,028 shares	0.00%	+349.03KNew	SEC filing ↗ May 14, 2026	▾
12	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$8.71M 274,740 shares	0.01%	+111.21K(+68.00%)Added	SEC filing ↗ May 15, 2026	▾
13	MORGAN STANLEY CIK 895421 · View history	$8.27M 260,727 shares	0.00%	-76.76K(-22.70%)Reduced	SEC filing ↗ May 15, 2026	▾
14	ALLIANCEBERNSTEIN L.P. CIK 1109448 · View history	$7.89M 253,226 shares	0.00%	+13.10K(+5.50%)Added	SEC filing ↗ May 15, 2026	▾
15	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$7.77M 245,175 shares	0.00%	+30.59K(+14.30%)Added	SEC filing ↗ May 15, 2026	▾
16	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$7.54M 242,921 shares	0.00%	-45.16K(-15.70%)Reduced	SEC filing ↗ May 13, 2026	▾
17	Hillsdale Investment Management Inc. CIK 1368465 · View history	$7.39M 233,080 shares	0.20%	+233.08KNew	SEC filing ↗ May 4, 2026	▾
18	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$6.75M 212,927 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
19	ProShare Advisors LLC CIK 1357955 · View history	$6.48M 204,256 shares	0.01%	+8.74K(+4.50%)Added	SEC filing ↗ Apr 27, 2026	▾
20	UBS Group AG CIK 1610520 · View history	$6.44M 203,036 shares	0.00%	+176.94K(+677.90%)Added	SEC filing ↗ May 5, 2026	▾

Showing 20 / 151 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

151

Cancelled or null records excluded

Disclosed shares

15,858,966

Not deduplicated across managers

Disclosed value

$502.80M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

FINANCIAL INSTITUTIONS INC · Q1 2026

Explore all 151 reporting institutions.

This page includes 20 of 151 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.