Company · Ownership research

MERCANTILE BANK CORP MBWM

CIK 0001042729 · CUSIP 587376104

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 587376104 (MBWM), not CUSIP 587376904 (MBWM), and does not merge CUSIPs.

This page lists the top 20 of 201 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	BlackRock, Inc. CIK 2012383 · View history	$70.13M 1,388,714 shares	0.00%	-50.17K(-3.50%)Reduced	SEC filing ↗ May 13, 2026	▾
02	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$60.05M 1,189,031 shares	0.01%	+894.22K(+303.30%)Added	SEC filing ↗ May 15, 2026	▾
03	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$52.16M 1,032,888 shares	0.01%	+1.40K(+0.10%)Added	SEC filing ↗ May 7, 2026	▾
04	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$35.57M 704,324 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$28.35M 561,467 shares	0.01%	+43.56K(+8.40%)Added	SEC filing ↗ May 15, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$25.37M 502,468 shares	0.00%	+55.45K(+12.40%)Added	SEC filing ↗ May 15, 2026	▾
07	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$23.85M 472,213 shares	0.04%	-24.00K(-4.80%)Reduced	SEC filing ↗ May 14, 2026	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$21.97M 435,012 shares	0.00%	+32.40K(+8.00%)Added	SEC filing ↗ May 15, 2026	▾
09	NORTH STAR ASSET MANAGEMENT INC CIK 1056559 · View history	$19.35M 383,180 shares	0.84%	+8.64K(+2.30%)Added	SEC filing ↗ May 6, 2026	▾
10	LSV ASSET MANAGEMENT CIK 1050470 · View history	$14.30M 283,186 shares	0.03%	-11.90K(-4.00%)Reduced	SEC filing ↗ May 11, 2026	▾
11	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$13.90M 275,321 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
12	NORTHERN TRUST CORP CIK 73124 · View history	$11.75M 232,600 shares	0.00%	+65.60K(+39.30%)Added	SEC filing ↗ May 14, 2026	▾
13	Tributary Capital Management, LLC CIK 1441888 · View history	$11.34M 224,632 shares	1.10%	-6.63K(-2.90%)Reduced	SEC filing ↗ May 4, 2026	▾
14	HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC CIK 1164833 · View history	$9.65M 191,153 shares	0.03%	-11.47K(-5.70%)Reduced	SEC filing ↗ May 15, 2026	▾
15	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$9.17M 181,647 shares	0.01%	+61.47K(+51.10%)Added	SEC filing ↗ May 15, 2026	▾
16	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$7.45M 148,858 shares	0.00%	-46.18K(-23.70%)Reduced	SEC filing ↗ May 13, 2026	▾
17	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$7.41M 146,713 shares	0.00%	-12.85K(-8.10%)Reduced	SEC filing ↗ May 15, 2026	▾
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$7.09M 140,446 shares	0.00%	+7.16K(+5.40%)Added	SEC filing ↗ May 15, 2026	▾
19	BANC FUNDS CO LLC CIK 1029311 · View history	$6.62M 131,160 shares	1.23%	+319(+0.20%)Added	SEC filing ↗ May 14, 2026	▾
20	MERCER GLOBAL ADVISORS INC /ADV CIK 853758 · View history	$6.53M 129,257 shares	0.01%	+19.68K(+18.00%)Added	SEC filing ↗ May 15, 2026	▾

Showing 20 / 201 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

201

Cancelled or null records excluded

Disclosed shares

11,694,855

Not deduplicated across managers

Disclosed value

$590.50M

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.

MERCANTILE BANK CORP · Q1 2026

Explore all 201 reporting institutions.

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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.