Position in APT
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$502,035
+$437,088 QoQ
Shares Held
113,071
+733.9% QoQ
Ownership
1.11%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#8
of 37 holders
Holding Since
Sep 2020
17 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in APT Over Time
Shares Held
Position Value (USD)
Position in Building Products & Equipment
Industrials · as of Mar 31, 2026GROUP ONE TRADING LLC holds $5,231,443 across 11 Building Products & Equipment names. APT ranks #3 (9.6% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CARR |
CARRIER GLOBAL Corp
|
41,801 | $2,353,814 | |
| 2 | BLDR |
Builders FirstSource, Inc.
|
24,561 | $2,022,107 | |
| 3 | APT |
Alpha Pro Tech Ltd
This page
|
113,071 | $502,035 | |
| 4 | MAS |
Masco Corp /De/
|
2,524 | $152,373 | |
| 5 | TREX |
Trex Co Inc
|
2,395 | $87,225 | |
| 6 | LMB |
Limbach Holdings, Inc.
|
673 | $52,527 | |
| 7 | LPX |
Louisiana-Pacific Corp
|
404 | $29,391 | |
| 8 | NPKI |
NPK International Inc.
|
993 | $14,388 |
All Filings in APT
Export CSV
17 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $502,035 | 113,071 | Shares | Sole | 2026-05-13 | |
| 2025-09-30 | $64,947 | 13,559 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $75,190 | 16,032 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $22,835 | 4,567 | Shares | Sole | 2025-05-14 | |
| 2024-06-30 | $64,075 | 11,650 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $79,210 | 12,694 | Shares | Sole | 2024-05-10 | |
| 2023-03-31 | $10,458 | 2,514 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $278,702 | 69,329 | Shares | Sole | 2023-02-09 | |
| 2022-09-30 | $142,778 | 35,254 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $258,439 | 57,946 | Shares | Sole | 2022-08-11 | |
| 2022-03-31 | $107,633 | 25,627 | Shares | Sole | 2022-05-12 | |
| 2021-12-31 | $257,438 | 43,122 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $45,427 | 6,750 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $413,185 | 48,213 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $542,021 | 55,535 | Shares | Sole | 2021-05-12 | |
| 2020-12-31 | $302,287 | 27,111 | Shares | Sole | 2021-02-10 | |
| 2020-09-30 | $266,246 | 18,014 | Shares | Sole | 2020-11-12 | |
| No filing history on record for this holder in this stock. | ||||||