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Livermore
Livermore
ZHEN

Penbrook Management LLC

SEC CIK
0001381055
Latest filing
Jul 23, 2026

KOPN holding history

Kopin Corp 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.

KOPN overviewAll 13F holders of KOPNFull Q2 2026 holdings

Shares (Q2 2026)
88,275
Value
$395.5K
% of portfolio
0.3%
Quarters held
20
Since Q1 2021
Holdings of KOPN by Penbrook Management LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202688,275$395.5K0.3%−26,300−23.0%ReducedHolders
Q1 2026114,575$257.8K0.2%−400−0.3%ReducedHolders
Q4 2025114,975$269.0K0.2%−22,000−16.1%ReducedHolders
Q3 2025136,975$332.8K0.2%+60,000+77.9%AddedHolders
Q2 202576,975$117.8K0.1%−16,350−17.5%ReducedHolders
Q1 202593,325$87.0K0.1%+44,750+92.1%AddedHolders
Q4 202448,575$66.1K<0.1%+48,575NewHolders
Q2 20240$00.0%−315,075−100.0%Sold outHolders
Q1 2024315,075$567.1K0.4%−7,500−2.3%ReducedHolders
Q4 2023322,575$654.8K0.4%−2,500−0.8%ReducedHolders
Q3 2023325,075$396.6K0.3%00.0%UnchangedHolders
Q2 2023325,075$698.9K0.5%+24,675+8.2%AddedHolders
Q1 2023300,400$327.4K0.3%−16,800−5.3%ReducedHolders
Q4 2022317,200$393.3K0.3%−250−0.1%ReducedHolders
Q3 2022317,450$333.0K0.3%−3,500−1.1%ReducedHolders
Q2 2022320,950$359.0K0.3%−1,750−0.5%ReducedHolders
Q1 2022322,700$816.0K0.5%00.0%UnchangedHolders
Q4 2021322,700$1.32M0.8%00.0%UnchangedHolders
Q3 2021322,700$1.65M1.0%+350+0.1%AddedHolders
Q2 2021322,350$2.64M1.7%−3,230−1.0%ReducedHolders
Q1 2021325,580$3.42M2.5%––Holders

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