ALPHA PRO TECH LTD - APT

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
CITADEL ADVISORS LLC History Added to 785,300 3,486 0.0% 0.0% 1 +550,449 234.38% Q1 2026 May 15, 2026
NEEDHAM INVESTMENT MANAGEMENT LLC History No change 642,500 2,852 0.15% 0.18% 2 0 0.0% Q1 2026 May 14, 2026
VANGUARD GROUP INC History No change 609,067 2,704 0.0% 0.0% 3 0 0.0% Q4 2025 Jan 29, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 553,674 2,458 0.0% 4 +553,674 New Q1 2026 May 15, 2026
RENAISSANCE TECHNOLOGIES LLC History Added to 544,072 2,415 0.0% 0.0% 5 +21,100 4.03% Q1 2026 May 14, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 420,126 1,865 0.0% 0.0% 6 +230,315 121.34% Q1 2026 May 15, 2026
BlackRock, Inc. History Added to 271,800 1,206 0.0% 0.0% 7 +1,391 0.51% Q1 2026 May 13, 2026
DIMENSIONAL FUND ADVISORS LP History No change 137,335 609 0.0% 0.0% 8 0 0.0% Q1 2026 May 07, 2026
ACADIAN ASSET MANAGEMENT LLC History No change 133,352 591 0.0% 0.0% 9 0 0.0% Q1 2026 May 13, 2026
GROUP ONE TRADING LLC History Added to 113,971 506 0.0% 0.0% 10 +111,971 5598.55% Q1 2026 May 13, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History No change 78,525 348 0.01% 0.01% 11 0 0.0% Q1 2026 May 15, 2026
GEODE CAPITAL MANAGEMENT, LLC History Reduced 68,386 304 0.0% 0.0% 12 -24,486 -26.37% Q1 2026 May 15, 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP History No change 58,309 258 0.0% 0.0% 13 0 0.0% Q1 2026 May 14, 2026
VANGUARD FIDUCIARY TRUST CO History New 51,432 228 0.0% 14 +51,432 New Q1 2026 May 08, 2026
STATE STREET CORP History No change 46,957 208 0.0% 0.0% 15 0 0.0% Q1 2026 May 15, 2026
JANE STREET GROUP, LLC History Reduced 40,130 178 0.0% 0.0% 16 -29,570 -42.42% Q1 2026 May 12, 2026
ESSEX INVESTMENT MANAGEMENT CO LLC History No change 34,375 152 0.02% 0.02% 17 0 0.0% Q1 2026 May 11, 2026
Pinnacle Financial Partners, Inc. History No change 25,000 111 0.0% 0.0% 18 0 0.0% Q1 2026 May 14, 2026
NORTHERN TRUST CORP History No change 18,074 80 0.0% 0.0% 19 0 0.0% Q1 2026 May 14, 2026
PRICE T ROWE ASSOCIATES INC /MD/ History No change 16,000 72 0.0% 0.0% 20 0 0.0% Q1 2026 May 15, 2026
CALDWELL SUTTER CAPITAL, INC. History No change 16,236 72 0.03% 0.03% 21 0 0.0% Q1 2026 May 05, 2026
XTX Topco Ltd History New 14,717 65 0.0% 22 +14,717 New Q1 2026 May 15, 2026
JAMES INVESTMENT RESEARCH, INC. History No change 11,050 49 0.01% 0.01% 23 0 0.0% Q1 2026 Apr 24, 2026
MORGAN STANLEY History No change 8,766 38 0.0% 0.0% 24 0 0.0% Q1 2026 May 15, 2026
OSAIC HOLDINGS, INC. History Reduced 4,780 21 0.0% 0.0% 25 -18,700 -79.64% Q1 2026 May 15, 2026
Vanguard Global Advisers, LLC History New 3,961 17 0.0% 26 +3,961 New Q1 2026 May 08, 2026
WELLS FARGO & COMPANY/MN History Added to 3,001 13 0.0% 0.0% 27 +1 0.03% Q1 2026 May 11, 2026
Tower Research Capital LLC (TRC) History Reduced 642 2 0.0% 0.0% 28 -504 -43.98% Q1 2026 May 15, 2026
Farther Finance Advisors, LLC History New 363 1 0.0% 31 +363 New Q1 2026 Apr 07, 2026
SBI Securities Co., Ltd. History Added to 252 1 0.0% 0.0% 30 +1 0.4% Q1 2026 Apr 27, 2026
BARCLAYS PLC History No change 426 1 0.0% 0.0% 29 0 0.0% Q1 2026 May 14, 2026
NewEdge Advisors, LLC History Closed out 0 0 0.0% -32,814 -100.0% Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History Closed out 0 0 0.0% -6,612 -100.0% Q1 2026 May 15, 2026
Federation des caisses Desjardins du Quebec History Closed out 0 0 0.0% -1,500 -100.0% Q1 2026 May 13, 2026
Garton & Associates Financial Advisors LLC History Closed out 0 0 0.0% -1,000 -100.0% Q1 2026 May 11, 2026
JPMORGAN CHASE & CO History Reduced 40 0 0.0% -566 -93.4% Q1 2026 May 13, 2026
JONES FINANCIAL COMPANIES LLLP History New 150 0 +150 New Q1 2026 May 15, 2026
SIMPLEX TRADING, LLC History New 100 0 +100 New Q1 2026 May 14, 2026
CITIGROUP INC History Reduced 1 0 -75 -98.68% Q1 2026 May 11, 2026
UBS Group AG History Closed out 0 0 -11 -100.0% Q1 2026 May 05, 2026
BNP PARIBAS FINANCIAL MARKETS History No change 13 0 0 0.0% Q1 2026 May 12, 2026
CWM, LLC History No change 100 0 0 0.0% Q1 2026 May 14, 2026
Archer Investment Corp History No change 39 0 0 0.0% Q1 2026 May 04, 2026
TD Waterhouse Canada Inc. History No change 40 0 0 0.0% Q1 2026 May 12, 2026