13F

Stock

Alpha Pro Tech Ltd

APT · held by 36 managers

Reported value

$12.8M

Holders

36

+5 new · −6 exited

Holders’ est. mark

$871

Price effect on 28 books still in the name

Largest holder

$2.85M

NEEDHAM INVESTMENT MANAGEMENT LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
NEEDHAM INVESTMENT MANAGEMENT LLC642.5K$2.85M$0Held
VANGUARD CAPITAL MANAGEMENT LLC553.7K$2.46MHeld
Renaissance Technologies544.1K$2.42M−$0Added$93.7K
BlackRock, Inc.271.8K$1.21M$1Added$6.18K
SUSQUEHANNA INTERNATIONAL GROUP, LLP141.2K$627K−$0Added$323.7K
DIMENSIONAL FUND ADVISORS LP137.3K$609.8K$0Held
GROUP ONE TRADING LLC113.1K$502KNew
BRIDGEWAY CAPITAL MANAGEMENT, LLC78.5K$348.7K$0Held
GEODE CAPITAL MANAGEMENT, LLC68.4K$304.1K$415Cut−$108.3K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP58.3K$258.9K$0Held
VANGUARD FIDUCIARY TRUST CO51.4K$228.4KHeld
State Street47K$208.5K$0Held
ESSEX INVESTMENT MANAGEMENT CO LLC34.4K$152.6K$0Held
JANE STREET GROUP, LLC25.6K$113.8KNew
Pinnacle Financial Partners, Inc.25K$111K$0Held
NORTHERN TRUST CORP18.1K$80.2K$0Held
CALDWELL SUTTER CAPITAL, INC.16.2K$72.1K$0Held
XTX Topco Ltd14.7K$65.3KNew
JAMES INVESTMENT RESEARCH, INC.11.1K$49.1K$0Held
MORGAN STANLEY8.77K$38.9K$0Held
OSAIC HOLDINGS, INC.4.78K$21.2K−$0Cut−$83K
Vanguard Global Advisers, LLC3.96K$17.6KHeld
WELLS FARGO & COMPANY/MN3K$13.3K−$2Added$2
Tower Research Capital LLC (TRC)642$2.85K−$0Cut−$2.24K
BARCLAYS PLC426$1.89K$0Held
Farther Finance Advisors, LLC363$1.73KNew
SBI Securities Co., Ltd.252$1.12K$1Added$5
JONES FINANCIAL COMPANIES LLLP150$660New
ACADIAN ASSET MANAGEMENT LLC133.4K$591$0Held
CWM, LLC100$444$444Added$444
TD Waterhouse Canada Inc.40$186$10Added$10
JPMORGAN CHASE & CO40$182$4Cut−$2.51K
Archer Investment Corp39$173$0Held
PRICE T ROWE ASSOCIATES INC /MD/16K$72$0Held
BNP PARIBAS FINANCIAL MARKETS13$58$0Held
CITIGROUP INC1$4−$0Cut−$333

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.