Penbrook Management LLC

Position in DAIO — Data I/O Corp

CIK 1381055 NEW YORK, NY

Position in DAIO

as of Mar 31, 2026 · filed Apr 21, 2026 Compact

Position Value

$902,830

-$228,384 QoQ

Shares Held

356,850

0.0% QoQ

Ownership

3.80%

of shares outstanding

% of Portfolio

0.72%

of 13F equity value

Holder Rank

of 29 holders

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 0.ToString("F0")% Shared 0.ToString("F0")% None 100.ToString("F0")%

Technology · as of Mar 31, 2026

Penbrook Management LLC holds $1,160,623 across 2 Electronic Components names. DAIO ranks #1 (77.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	DAIO	Data I/O Corp This page	356,850	$902,830
2	KOPN	Kopin Corp	114,575	$257,793

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$902,830	356,850	0.0%	Shares	Sole	2026-04-21
2025-12-31	$1,131,214	356,850	+1.2%	Shares	Sole	2026-01-06
2025-09-30	$1,178,185	352,750	+0.9%	Shares	Sole	2025-10-22
2025-06-30	$1,084,225	349,750	+29.8%	Shares	Sole	2025-07-28
2025-03-31	$660,152	269,450	-0.7%	Shares	Sole	2025-04-01
2024-12-31	$751,916	271,450	0.0%	Shares	Sole	2025-01-23
2024-09-30	$697,626	271,450	-13.0%	Shares	Sole	2024-10-15
2024-06-30	$861,258	312,050	0.0%	Shares	Sole	2024-07-24
2024-03-31	$1,098,416	312,050	-8.9%	Shares	Sole	2024-04-18
2023-12-31	$1,006,509	342,350	-0.6%	Shares	Sole	2024-01-16
2023-09-30	$1,311,592	344,250	-0.9%	Shares	Sole	2023-10-10
2023-06-30	$1,489,702	347,250	0.0%	Shares	Sole	2023-07-17
2023-03-31	$1,725,832	347,250	-0.7%	Shares	Sole	2023-04-20
2022-12-31	$1,388,507	349,750	-0.3%	Shares	Sole	2023-01-24
2022-09-30	$978,592	350,750	0.0%	Shares	Sole	2022-10-31
2022-06-30	$1,076,802	350,750	-0.1%	Shares	Sole	2022-07-29
2022-03-31	$1,491,537	350,950	0.0%	Shares	Sole	2022-04-26
2021-12-31	$1,617,879	350,950	+0.6%	Shares	Sole	2022-01-10
2021-09-30	$2,278,643	348,950	-0.3%	Shares	Sole	2021-10-26
2021-06-30	$2,383,159	349,950	-2.0%	Shares	Sole	2021-07-27
2021-03-31	$1,936,295	357,250	-0.7%	Shares	Sole	2021-05-06
2020-12-31	$1,482,170	359,750	-1.4%	Shares	Sole	2022-04-25
2020-09-30	$1,160,223	364,850	+18.6%	Shares	Sole	2020-10-23
2020-06-30	$1,039,721	307,610	+1.9%	Shares	Sole	2020-07-28
2020-03-31	$848,648	302,010	—	Shares	Sole	2020-04-14
No filing history on record for this holder in this stock.