Penbrook Management LLC

SEC CIK: 0001381055
Latest filing: Jul 23, 2026

SEC filings (opens in a new tab)

PLAB holding history

Photronics Inc in every 13F filed by Penbrook Management LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

PLAB overview All 13F holders of PLAB Full Q2 2026 holdings

Shares (Q2 2026): 89,055
Value: $2.90M
% of portfolio: 1.8%
Quarters held: 22; Since Q1 2021

Holdings of PLAB by Penbrook Management LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	89,055	$2.90M	1.8%	−7,675−7.9%	Reduced	Holders
Q1 2026	96,730	$3.91M	3.0%	−13,950−12.6%	Reduced	Holders
Q4 2025	110,680	$3.54M	2.4%	−700−0.6%	Reduced	Holders
Q3 2025	111,380	$2.56M	1.8%	+4,950+4.7%	Added	Holders
Q2 2025	106,430	$2.00M	1.5%	+14,385+15.6%	Added	Holders
Q1 2025	92,045	$1.91M	1.4%	−1,000−1.1%	Reduced	Holders
Q4 2024	93,045	$2.19M	1.5%	+350+0.4%	Added	Holders
Q3 2024	92,695	$2.30M	1.5%	−10,700−10.3%	Reduced	Holders
Q2 2024	103,395	$2.55M	1.6%	−11,100−9.7%	Reduced	Holders
Q1 2024	114,495	$3.24M	2.0%	−7,305−6.0%	Reduced	Holders
Q4 2023	121,800	$3.82M	2.6%	−300−0.2%	Reduced	Holders
Q3 2023	122,100	$2.47M	1.8%	−300−0.2%	Reduced	Holders
Q2 2023	122,400	$3.16M	2.3%	−2,000−1.6%	Reduced	Holders
Q1 2023	124,400	$2.06M	1.6%	−500−0.4%	Reduced	Holders
Q4 2022	124,900	$2.10M	1.8%	−800−0.6%	Reduced	Holders
Q3 2022	125,700	$1.84M	1.6%	−4,050−3.1%	Reduced	Holders
Q2 2022	129,750	$2.53M	2.0%	−9,150−6.6%	Reduced	Holders
Q1 2022	138,900	$2.36M	1.5%	−1,700−1.2%	Reduced	Holders
Q4 2021	140,600	$2.65M	1.6%	−250−0.2%	Reduced	Holders
Q3 2021	140,850	$1.92M	1.2%	−800−0.6%	Reduced	Holders
Q2 2021	141,650	$1.87M	1.2%	+1,100+0.8%	Added	Holders
Q1 2021	140,550	$1.81M	1.3%	–	–	Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.