Kopin Corporation
DE ˙ DB ˙ US5006001011
4,68 € ↓ -0,78 (-14,28%)
2026-06-05
DEL PRIS
SecurityDE:KOC / Kopin Corporation
InstitutionPenbrook Management LLC
Latest Disclosed Ownership114,575 shares
Latest Disclosed Value $ 257,793
Penbrook Management LLC reports 0.35% decrease in ownership of KOC / Kopin Corporation

On April 21, 2026 - Penbrook Management LLC filed a 13F-HR form disclosing ownership of 114,575 shares of Kopin Corporation (DE:KOC) valued at $217,807 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 6, 2026 disclosing 114,975 shares of Kopin Corporation. This represents a change in shares of -0.35% during the quarter. The current value of the position is $535,638 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F KOPIN CORP COM Stock 500600101 114,575 -400 -0.35 258 -4.46 0.1952
2026-01-06 2025-12-31 13F KOPIN CORP COM Stock 500600101 114,975 -22,000 -16.06 269 -18.98 0.1856
2025-10-22 2025-09-30 13F KOPIN CORP COM Stock 500600101 136,975 60,000 77.95 333 183.76 0.2324
2025-07-28 2025-06-30 13F/A-1 KOPIN CORP COM Stock 500600101 76,975 -16,350 -17.52 118 36.05 0.0886
2025-07-25 2025-06-30 13F KOPIN Stock 500600101 93,325 0 87 0.0658
2025-04-01 2025-03-31 13F KOPIN Stock 500600101 93,325 44,750 92.13 87 30.30 0.0658
2025-01-23 2024-12-31 13F KOPIN Stock 500600101 48,575 48,575 66 0.0451
2024-07-24 2024-06-30 13F KOPIN Stock 500600101 0 -315,075 -100.00 0 -100.00
2024-04-18 2024-03-31 13F KOPIN Stock 500600101 315,075 -7,500 -2.33 567 -13.30 0.3515
2024-01-16 2023-12-31 13F KOPIN Stock 500600101 322,575 -2,500 -0.77 655 65.15 0.4399
2023-10-10 2023-09-30 13F KOPIN Stock 500600101 325,075 0 0.00 397 -43.27 0.2906
2023-07-17 2023-06-30 13F KOPIN Stock 500600101 325,075 24,675 8.21 699 113.46 0.5066
2023-04-20 2023-03-31 13F KOPIN Stock 500600101 300,400 -16,800 -5.30 327 -16.79 0.2509
2023-01-24 2022-12-31 13F KOPIN Stock 500600101 317,200 -250 -0.08 393 18.02 0.3352
2022-10-31 2022-09-30 13F KOPIN Stock 500600101 317,450 -3,500 -1.09 333 -7.24 0.2866
2022-07-29 2022-06-30 13F KOPIN Stock 500600101 320,950 -1,750 -0.54 359 -56.00 0.2831
2022-04-26 2022-03-31 13F KOPIN CORP COM Stock 500600101 322,700 0 0.00 816 -38.18 0.5294
2022-01-10 2021-12-31 13F KOPIN Stock 500600101 322,700 0 0.00 1,320 -19.76 0.7953
2021-10-26 2021-09-30 13F KOPIN CORP COM Stock 500600101 322,700 350 0.11 1,645 -37.62 1.0223
2021-07-27 2021-06-30 13F KOPIN CORP COM COM 500600101 322,350 -3,230 -0.99 2,637 -22.78 1.5806
2021-05-06 2021-03-31 13F/A-2 KOPIN Stock 500600101 325,580 -276,015 -45.88 3,415 133.58 2.4577
2021-05-05 2021-03-31 13F/A-1 KOPIN Stock 500600101 325,580 0 3,415 2.4773
2021-04-16 2021-03-31 13F KOPIN Stock 500600101 647,555 45,960 226 0.2631
2022-04-25 2020-12-31 13F/A-1 KOPIN CORP COM Stock 500600101 601,595 -54,460 -8.30 1,462 61.55 1.1261
2021-01-27 2020-12-31 13F KOPIN COM 500600101 601,595 -54,460 1,462 1.0307
2020-10-23 2020-09-30 13F KOPIN COM 500600101 656,055 25,925 4.11 905 8.00 0.7845
2020-07-28 2020-06-30 13F KOPIN COM 500600101 630,130 0 0.00 838 280.91 0.8243
2020-04-14 2020-03-31 13F KOPIN COM 500600101 630,130 0 0.00 220 -12.70 0.2817
2020-01-16 2019-12-31 13F KOPIN COM 500600101 630,130 -27,250 -4.15 252 -43.50 0.2455
2019-10-11 2019-09-30 13F KOPIN COM 500600101 657,380 -9,150 -1.37 446 -38.65 0.4839
2019-07-15 2019-06-30 13F KOPIN COM 500600101 666,530 -6,000 -0.89 727 -19.31 0.7800
2019-04-24 2019-03-31 13F KOPIN COM 500600101 672,530 176,625 35.62 901 82.02 0.9368
2019-02-01 2018-12-31 13F KOPIN COM 500600101 495,905 -42,000 -7.81 495 -61.98 0.5649
2018-10-23 2018-09-30 13F KOPIN COM 500600101 537,905 0 0.00 1,302 -15.40 1.2471
2018-07-30 2018-06-30 13F KOPIN COM 500600101 537,905 0 0.00 1,539 -8.28 1.4803
2018-04-27 2018-03-31 13F KOPIN COM 500600101 537,905 0 0.00 1,678 -2.56 1.6778
2018-02-21 2017-12-31 13F KOPIN COM 500600101 537,905 86,935 19.28 1,722 75.18 1.5503
2016-10-27 2016-09-30 13F KOPIN COM 500600101 450,970 13,470 3.08 983 1.24 1.0592
2016-08-05 2016-06-30 13F KOPIN COM 500600101 437,500 437,500 971 1.0706
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.