Security key
020772109
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 2,440,602
- Total 13F value
- $9,831,561
- Share change
- -11,896
- Put/Call ratio
- 188%
- SEC-reported price per share
- $4.02
- Number of holders
- 31
- Value change
- -$48,752
- Number of buys
- 14
- Number of sells
- 14
- Shares outstanding
- 10,202,127
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2022
Institutions
31
Top holders
10
APT full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
ALPHA PRO TECH LTD SEC filings
ALPHA PRO TECH LTD company facts
Broader feeds
Reporting periods
Holder history for CUSIP 020772109
Recent filing periods:
Ownership snapshot
Top reported holders of APT - ALPHA PRO TECH LTD - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Donna Millar
Disclosed value leader
Donna Millar
Comparable rows
15/15
Latest evidence
30 Sep 2022
13D/G
13F
Lead comparable stake: 12%
13D/G row: Donna Millar
Showing 1-6 of 15 holder rows.
Quick read
Donna Millar leads the comparable SEC ownership view at 12%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Donna Millar's linked filing trail.
Comparable ownership
Top 5
Donna Millar
12%
RENAISSANCE TECHNOLOGIES LLC
5.8%
VANGUARD GROUP INC
5.7%
BlackRock Finance, Inc.
2.2%
NEEDHAM INVESTMENT MANAGEMENT LLC
2.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Donna Millar |
13D/G
Millar Donna
|
12%
|
$5,356,795
1,284,603 shares
|
$0 | 13 Dec 2018 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
5.8%
|
$2,402,000
593,163 shares
|
— | 30 Sep 2022 |
| VANGUARD GROUP INC |
13F
Company
|
5.7%
|
$2,347,000
579,446 shares
|
— | 30 Sep 2022 |
| BlackRock Finance, Inc. |
13F
Company
|
2.2%
|
$906,000
223,836 shares
|
— | 30 Sep 2022 |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13F
Company
|
2.2%
|
$891,000
220,000 shares
|
— | 30 Sep 2022 |
| ESSEX INVESTMENT MANAGEMENT CO LLC |
13F
Company
|
1.5%
|
$639,000
157,728 shares
|
— | 30 Sep 2022 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2022
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
31
Shares
2,440,602
Rows available
31
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2022 vs Q3 2022 Across Filers
Q3 2022 holders
33
Q4 2022 holders
31
Holder diff
-2
| Investor | Q3 2022 Shares | Q4 2022 Shares | Share Diff | Share Chg % | Q3 2022 value | Q4 2022 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend