Company · Ownership research

ALPHA PRO TECH LTD APT

CIK 0000884269 · CUSIP 020772109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 020772109 (APT), not CUSIP 020772909 (APT), CUSIP 020772959 (APT), CUSIP 09258M101 (APT), and does not merge CUSIPs.

This page lists the top 20 of 37 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	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$2.85M 642,500 shares	0.15%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
02	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$2.46M 553,674 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
03	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$2.42M 544,072 shares	0.00%	+21.10K(+4.00%)Added	SEC filing ↗ May 14, 2026	▾
04	BlackRock, Inc. CIK 2012383 · View history	$1.21M 271,800 shares	0.00%	+1.39K(+0.50%)Added	SEC filing ↗ May 13, 2026	▾
05	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$627.04K 141,226 shares	0.00%	+72.92K(+106.70%)Added	SEC filing ↗ May 15, 2026	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$609.77K 137,335 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 7, 2026	▾
07	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$591.00K 133,352 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 13, 2026	▾
08	GROUP ONE TRADING LLC CIK 932540 · View history	$502.04K 113,071 shares	0.02%	+113.07KNew	SEC filing ↗ May 13, 2026	▾
09	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$348.65K 78,525 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$304.14K 68,386 shares	0.00%	-24.49K(-26.40%)Reduced	SEC filing ↗ May 15, 2026	▾
11	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$258.89K 58,309 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2026	▾
12	VANGUARD FIDUCIARY TRUST CO CIK 933478 · Amended · View history	$228.36K 51,432 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
13	STATE STREET CORP CIK 93751 · View history	$208.49K 46,957 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
14	ESSEX INVESTMENT MANAGEMENT CO LLC CIK 201772 · View history	$152.63K 34,375 shares	0.02%	0(0.00%)Unchanged	SEC filing ↗ May 11, 2026	▾
15	JANE STREET GROUP, LLC CIK 1595888 · View history	$113.80K 25,630 shares	0.00%	+25.63KNew	SEC filing ↗ May 12, 2026	▾
16	Pinnacle Financial Partners, Inc. CIK 2082866 · View history	$111.00K 25,000 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2026	▾
17	NewEdge Advisors, LLC CIK 1633516 · Amended · View history	$82.99K 18,691 shares	0.00%	-14.12K(-43.00%)Reduced	SEC filing ↗ Jun 3, 2026	▾
18	NORTHERN TRUST CORP CIK 73124 · View history	$80.25K 18,074 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2026	▾
19	CALDWELL SUTTER CAPITAL, INC. CIK 702007 · View history	$72.09K 16,236 shares	0.03%	0(0.00%)Unchanged	SEC filing ↗ May 6, 2026	▾
20	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$72.00K 16,000 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾

Showing 20 / 37 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

3,042,986

Not deduplicated across managers

Disclosed value

$13.51M

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.

ALPHA PRO TECH LTD · Q1 2026

Explore all 37 reporting institutions.

This page includes 20 of 37 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.