Penbrook Management LLC

SEC CIK: 0001381055
Latest filing: Jul 23, 2026

SEC filings (opens in a new tab)

ACLS holding history

Axcelis Technologies 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.

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

Shares (Q2 2026): 10,895
Value: $2.06M
% of portfolio: 1.3%
Quarters held: 22; Since Q1 2021

Holdings of ACLS by Penbrook Management LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	10,895	$2.06M	1.3%	−1,200−9.9%	Reduced	Holders
Q1 2026	12,095	$1.13M	0.9%	−3,800−23.9%	Reduced	Holders
Q4 2025	15,895	$1.28M	0.9%	−1,000−5.9%	Reduced	Holders
Q3 2025	16,895	$1.65M	1.2%	00.0%	Unchanged	Holders
Q2 2025	16,895	$1.18M	0.9%	−2,745−14.0%	Reduced	Holders
Q1 2025	19,640	$975.5K	0.7%	+75+0.4%	Added	Holders
Q4 2024	19,565	$1.37M	0.9%	00.0%	Unchanged	Holders
Q3 2024	19,565	$2.05M	1.3%	−3,360−14.7%	Reduced	Holders
Q2 2024	22,925	$3.26M	2.0%	−19,535−46.0%	Reduced	Holders
Q1 2024	42,460	$4.74M	2.9%	−580−1.3%	Reduced	Holders
Q4 2023	43,040	$5.58M	3.8%	−550−1.3%	Reduced	Holders
Q3 2023	43,590	$7.11M	5.2%	−1,035−2.3%	Reduced	Holders
Q2 2023	44,625	$8.18M	5.9%	−2,685−5.7%	Reduced	Holders
Q1 2023	47,310	$6.30M	4.9%	−365−0.8%	Reduced	Holders
Q4 2022	47,675	$3.78M	3.2%	00.0%	Unchanged	Holders
Q3 2022	47,675	$2.89M	2.5%	−250−0.5%	Reduced	Holders
Q2 2022	47,925	$2.63M	2.1%	−225−0.5%	Reduced	Holders
Q1 2022	48,150	$3.64M	2.4%	−14,150−22.7%	Reduced	Holders
Q4 2021	62,300	$4.64M	2.8%	−1,500−2.4%	Reduced	Holders
Q3 2021	63,800	$3.00M	1.9%	−750−1.2%	Reduced	Holders
Q2 2021	64,550	$2.61M	1.6%	−1,250−1.9%	Reduced	Holders
Q1 2021	65,800	$2.70M	1.9%	–	–	Holders

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