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Disclosery

APT ALPHA PRO TECH LTD

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COM (common), issuer CIK 884269

35 managers (37 13F filers) reported a position in APT shares at 2026-03-31, 3,042,986 shares in all. 5 filers opened a position and 5 filers sold out during the quarter.

Managers
35
13F filers
37
New
5
Added
5
Reduced
6
Sold out
5
Shares held by filers
3,042,986

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…642,500$2.85M0.15%013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 3 filers holding609,067$2.7MnewTimeline
RENAISSANCE TECHNOLOGIES LLC544,072$2.42M<0.01%+21,10013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.271,800$1.21M<0.01%+1,39113F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…141,226$627K<0.01%+72,91513F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP137,335$610K<0.01%013F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC133,352$591K<0.01%013F-HRTimelineGroup
GROUP ONE TRADING LLC113,071$502K0.02%new13F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC78,525$349K0.01%013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC68,386$304K<0.01%-24,48613F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …58,309$259K<0.01%013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP46,957$208K<0.01%013F-HRTimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC34,375$153K0.02%013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC25,630$114K<0.01%new13F-HRTimelineGroup
Pinnacle Financial Partners, Inc.in group Pinnacle Financial Partners, …25,000$111K<0.01%013F-HRTimelineGroup
NewEdge Advisors, LLC18,691$83K<0.01%-14,12313F-HR/ATimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP18,074$80.2K<0.01%013F-HRTimelineGroup
CALDWELL SUTTER CAPITAL, INC.16,236$72.1K0.03%013F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/16,000$72K<0.01%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd14,717$65.3K<0.01%new13F-HRTimelineGroup
JAMES INVESTMENT RESEARCH, INC.11,050$49.1K0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY8,766$38.9K<0.01%013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.4,780$21.2K<0.01%-18,70013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN3,001$13.3K<0.01%+113F-HR/ATimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…642$2.85K<0.01%-50413F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC426$1.89K<0.01%013F-HRTimelineGroup
Farther Finance Advisors, LLC363$1.73K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.252$1.12K<0.01%+113F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP150$660<0.01%new13F-HRTimelineGroup
CWM, LLCin group CWM, LLC100$444<0.01%013F-HRTimelineGroup
TD Waterhouse Canada Inc.40$186<0.01%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO40$182<0.01%-56613F-HR/ATimelineGroup
Archer Investment Corp39$173<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS13$58<0.01%013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC1$4<0.01%-7513F-HRTimelineGroup