Penbrook Management LLC

In its 13F for Q1 2026 (holdings as of March 31, 2026, filed April 21, 2026), Penbrook Management LLC reported 93 stock positions worth $132.1 million. Its top holding was Novo-Nordisk A/S-Spons ADR (NVO) at 8.8% of the portfolio, followed by Amazon.com (AMZN, 8.2%) and Microsoft (MSFT, 6.2%). Compared with Q4 2025, it opened 8 new positions, sold out of 12, added to 14 and reduced 28. The biggest buy was a new position in Prothena (PRTA) and the biggest sale Novo-Nordisk A/S-Spons ADR (NVO, shares −0%).

Most Recent 13F
Q2 2026
Location
NEW YORK, NY
CIK
0001381055
Portfolio Value
$132.1M (Q1 2026)
SEC Filing
0001381055-26-000002 ↗ filed Apr 21, 2026

Holdings Value

0$50.0M$100.0M$150.0M$200.0M Q1 2024: $161.3M Q1 2024 Q2 2024: $163.8M Q2 2024 Q3 2024: $153.8M Q3 2024 Q4 2024: $146.6M Q4 2024 Q1 2025: $132.3M Q1 2025 Q2 2025: $133.0M Q2 2025 Q3 2025: $143.2M Q3 2025 Q4 2025: $145.0M Q4 2025 Q1 2026: $132.1M $132.1M Q1 2026 Q2 2026: $156.8M Q2 2026

Holdings 93 stocks · $132.1M
NVO Novo-Nordisk A/S-Spons ADR 8.80% 316,200 $11.6M Reduce -0.1%
AMZN Amazon.com Inc. 8.16% 51,760 $10.8M No change
MSFT Microsoft Corp. 6.24% 22,245 $8.2M Reduce -2.2%
GOOGL Alphabet Inc. Class A 5.05% 23,170 $6.7M No change
GOOG Alphabet Inc. Class C 4.90% 22,554 $6.5M No change
MCO Moody's Corp. 4.49% 13,600 $5.9M No change
PLAB Photronics Inc. 2.96% 96,730 $3.9M Reduce -12.6%
PL Planet Labs PBC 2.24% 105,870 $3.0M Reduce -64.1%
AEHR Aehr Test Systems 2.23% 79,515 $2.9M Reduce -30.8%
SA Seabridge Gold Inc. 2.06% 95,990 $2.7M No change
VET Vermilion Energy Inc. 2.06% 197,825 $2.7M No change
PRTA Prothena Corp. PLC 2.00% 271,720 $2.6M New
VMD Viemed Healthcare Inc. 1.90% 272,398 $2.5M Add +0.3%
ELVA Electrovaya Inc. 1.74% 295,356 $2.3M Reduce -15.6%
TRI Thomson Reuters Corp. 1.69% 24,774 $2.2M Reduce -0.7%
BX Blackstone Inc. 1.58% 18,150 $2.1M Add +22.6%
ALKT Alkami Technology Inc. 1.52% 127,685 $2.0M No change
CURI Curiositystream Inc. 1.51% 675,150 $2.0M Add +94.4%
NNY Nuveen New York Muni Val 1.35% 213,727 $1.8M No change
TRGP Targa Resources Corp. 1.31% 6,892 $1.7M Reduce -1.9%
BRK.B Berkshire Hathaway Inc. Class B 1.20% 3,300 $1.6M Reduce -1.5%
CYRX Cryoport Inc. 1.16% 185,775 $1.5M Add +251.6%
VZ Verizon Communications Inc. 1.14% 29,899 $1.5M Reduce -4.0%
ET Energy Transfer LP 1.09% 74,489 $1.4M No change
CSCO Cisco Systems Inc. 1.08% 18,350 $1.4M No change
SONY Sony Group Corp. - SP ADR 1.07% 68,500 $1.4M No change
WMB Williams Cos Inc. 1.05% 19,130 $1.4M No change
MESO Mesoblast Ltd.- Spon ADR 1.01% 87,075 $1.3M Reduce -0.6%
MGNI Magnite Inc. 1.01% 112,190 $1.3M Add +260.6%
ADP Automatic Data Processing 0.97% 6,300 $1.3M No change
EXTR Extreme Networks Inc. 0.95% 83,525 $1.3M New
HESM Hess Midstream LP Class A 0.88% 30,055 $1.2M No change
ABNB Airbnb Inc. Class A 0.86% 8,950 $1.1M No change
ACLS Axcelis Technologies Inc. 0.85% 12,095 $1.1M Reduce -23.9%
ABBV Abbvie Inc. 0.85% 5,170 $1.1M Reduce -1.1%
USAC USA Compression Partners LP 0.84% 41,038 $1.1M No change
SPY SS SPDR S&P 500 ETF Trust-US 0.79% 1,605 $1.0M Reduce -6.7%
OKE Oneok Inc. 0.77% 11,310 $1.0M No change
DV Doubleverify Holdings Inc. 0.74% 102,910 $978K No change
NPKI NPK International Inc. 0.74% 67,250 $974K No change
META Meta Platforms Inc. Class A 0.74% 1,700 $973K No change
MRVL Marvell Technology Inc. 0.73% 9,730 $964K No change
NVDA Nvidia Corp. 0.69% 5,223 $911K No change
DAIO Data I/O Corp. 0.68% 356,850 $903K No change
SHEL Shell PLC-ADR 0.66% 9,400 $874K No change
NVS Novartis AG-Sponsored ADR 0.64% 5,540 $846K Reduce -1.3%
CVE Cenovus Energy Inc. 0.60% 29,880 $793K No change
ASUR Asure Software Inc. 0.58% 89,635 $771K Add +0.5%
SGOL Abrdn Physical Gold Shares 0.58% 17,155 $765K No change
BPOP Popular Inc. 0.56% 5,500 $738K Reduce -53.6%
EMR Emerson Electric Co. 0.53% 5,300 $694K No change
WES Western Midstream Partners L 0.50% 15,900 $655K No change
RRC Range Resources Corp. 0.49% 14,240 $643K No change
REGN Regeneron Pharmaceuticals 0.46% 785 $607K Reduce -1.5%
QQQ Invesco QQQ Trust Series 1 0.40% 925 $534K Reduce -50.5%
LINC Lincoln Educational Services 0.39% 12,740 $518K Reduce -25.2%
FBP First Bancorp Puerto Rico 0.38% 23,500 $502K Reduce -47.7%
PIM Franklin Master Interm IT-Ui filed as PUTNAM MASTER INTER INCOME T 0.36% 147,063 $481K No change
PAR Par Technology Corp. 0.36% 35,775 $477K Add +80.5%
POWI Power Integrations Inc. 0.36% 9,200 $471K No change
KLIC Kulicke & Soffa Industries 0.35% 7,100 $467K No change
BLFS Biolife Solutions Inc. 0.33% 23,155 $442K Add +0.9%
DMLP Dorchester Minerals LP 0.33% 16,225 $440K No change
EPD Enterprise Products Partners 0.33% 11,427 $432K No change
FNF Fidelity National Financial 0.32% 9,168 $425K Reduce -54.9%
AAPL Apple Inc. 0.29% 1,529 $388K No change
BMY Bristol-Myers Squibb Co. 0.29% 6,250 $379K No change
OSS One Stop Systems Inc. 0.27% 46,740 $354K No change
PAYS Paysign Inc. 0.25% 55,785 $329K Add +81.0%
RSP Invesco S&P 500 Equal Weight 0.24% 1,670 $321K No change
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.24% 1,283 $311K Reduce -21.1%
CVX Chevron Corp. 0.22% 1,377 $285K No change
COP Conocophillips 0.20% 2,025 $267K New
KOPN Kopin Corp. 0.20% 114,575 $258K Reduce -0.3%
BLZE Backblaze Inc. Class A 0.19% 72,150 $249K Add +1.1%
SPYM Ste STR SPDR PT S&P 500 ETF 0.18% 3,180 $243K Reduce -0.6%
UTG Reaves Utility Income Fund 0.18% 6,125 $241K Add +1.7%
JEPI JPMorgan Equity Premium Inco 0.18% 4,225 $239K No change
AM Antero Midstream Corp. 0.17% 9,900 $226K New
TTI Tetra Technologies Inc. 0.17% 26,410 $225K Reduce -39.9%
HTGC Hercules Capital Inc. 0.17% 15,060 $222K Add +2.0%
XOM Exxon Mobil Corp. 0.16% 1,280 $217K New
NKE Nike Inc. Class B 0.16% 3,960 $209K Add +1.9%
MRK Merck & Co. Inc. 0.15% 1,700 $204K New
VKQ Invesco Municipal Trust 0.14% 20,000 $190K No change
GBDC Golub Capital BDC Inc. 0.14% 14,680 $186K Reduce -38.0%
NUV Nuveen Municipal Value 0.14% 20,000 $180K No change
IOVA Iovance Biotherapeutics Inc. 0.11% 42,445 $149K Add +25.0%
DX Dynex Capital Inc. 0.10% 10,050 $128K New
AQST Aquestive Therapeutics Inc. 0.08% 25,565 $106K Reduce -39.4%
ONDS Ondas Inc. 0.07% 10,005 $90K No change
PROF Profound Medical Corp. 0.06% 12,300 $80K New
XGN Exagen Inc. 0.03% 13,330 $40K Reduce -0.7%

Portfolio Sells Q4 2025 → Q1 2026
NVO Novo-Nordisk A/S-Spons ADR Reduce -0.1% 8.80% −2.30
PL Planet Labs PBC Reduce -64.1% 2.24% −1.78
MSFT Microsoft Corp. Reduce -2.2% 6.24% −1.35
SYF Synchrony Financial Sold out 0.00% −0.89
COHU Cohu Inc. Sold out 0.00% −0.61
TRI Thomson Reuters Corp. Reduce -0.7% 1.69% −0.59
BPOP Popular Inc. Reduce -53.6% 0.56% −0.46
FNF Fidelity National Financial Reduce -54.9% 0.32% −0.44
QQQ Invesco QQQ Trust Series 1 Reduce -50.5% 0.40% −0.39
GPN Global Payments Inc. Sold out 0.00% −0.27
FBP First Bancorp Puerto Rico Reduce -47.7% 0.38% −0.26
BBSI Barrett Business SVCS Inc. Sold out 0.00% −0.22
FAF First American Financial Sold out 0.00% −0.18
WBS Webster Financial Corp. Sold out 0.00% −0.18
ELVA Electrovaya Inc. Reduce -15.6% 1.74% −0.17
AFL Aflac Inc. Sold out 0.00% −0.15
FIS Fidelity National Info Serv Sold out 0.00% −0.15
JPM JPMorgan Chase & Co. Sold out 0.00% −0.15
TFPM Triple Flag Precious Met Sold out 0.00% −0.14
TTI Tetra Technologies Inc. Reduce -39.9% 0.17% −0.11
AQST Aquestive Therapeutics Inc. Reduce -39.4% 0.08% −0.11
IBM Intl Business Machines Corp. Reduce -21.1% 0.24% −0.10
GBDC Golub Capital BDC Inc. Reduce -38.0% 0.14% −0.08
MESO Mesoblast Ltd.- Spon ADR Reduce -0.6% 1.01% −0.08
BTQ BTQ Technologies Corp. Sold out 0.00% −0.04
MIN Aberdeen Intermediate Inc. FD Sold out 0.00% −0.03
ACLS Axcelis Technologies Inc. Reduce -23.9% 0.85% −0.03
XGN Exagen Inc. Reduce -0.7% 0.03% −0.03
SPY SS SPDR S&P 500 ETF Trust-US Reduce -6.7% 0.79% −0.02
SPYM Ste STR SPDR PT S&P 500 ETF Reduce -0.6% 0.18% +0.01
KOPN Kopin Corp. Reduce -0.3% 0.20% +0.01
ABBV Abbvie Inc. Reduce -1.1% 0.85% +0.03
REGN Regeneron Pharmaceuticals Reduce -1.5% 0.46% +0.04
BRK.B Berkshire Hathaway Inc. Class B Reduce -1.5% 1.20% +0.04
NVS Novartis AG-Sponsored ADR Reduce -1.3% 0.64% +0.11
LINC Lincoln Educational Services Reduce -25.2% 0.39% +0.11
VZ Verizon Communications Inc. Reduce -4.0% 1.14% +0.26
TRGP Targa Resources Corp. Reduce -1.9% 1.31% +0.41
PLAB Photronics Inc. Reduce -12.6% 2.96% +0.52
AEHR Aehr Test Systems Reduce -30.8% 2.23% +0.63

Portfolio Buys Q4 2025 → Q1 2026
PRTA Prothena Corp. PLC New 2.00% +2.00
EXTR Extreme Networks Inc. New 0.95% +0.95
CYRX Cryoport Inc. Add +251.6% 1.16% +0.81
MGNI Magnite Inc. Add +260.6% 1.01% +0.66
CURI Curiositystream Inc. Add +94.4% 1.51% +0.60
VMD Viemed Healthcare Inc. Add +0.3% 1.90% +0.51
COP Conocophillips New 0.20% +0.20
AM Antero Midstream Corp. New 0.17% +0.17
XOM Exxon Mobil Corp. New 0.16% +0.16
MRK Merck & Co. Inc. New 0.15% +0.15
PAYS Paysign Inc. Add +81.0% 0.25% +0.14
DX Dynex Capital Inc. New 0.10% +0.10
PROF Profound Medical Corp. New 0.06% +0.06
IOVA Iovance Biotherapeutics Inc. Add +25.0% 0.11% +0.05
UTG Reaves Utility Income Fund Add +1.7% 0.18% +0.03
BX Blackstone Inc. Add +22.6% 1.58% +0.01
ASUR Asure Software Inc. Add +0.5% 0.58% +0.00
NKE Nike Inc. Class B Add +1.9% 0.16% −0.01
HTGC Hercules Capital Inc. Add +2.0% 0.17% −0.02
BLZE Backblaze Inc. Class A Add +1.1% 0.19% −0.04
BLFS Biolife Solutions Inc. Add +0.9% 0.33% −0.05
PAR Par Technology Corp. Add +80.5% 0.36% −0.13

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 101$156.8MNVO, AMZN, GOOGL, MSFT, GOOG
Q1 2026 93$132.1MNVO, AMZN, MSFT, GOOGL, GOOG
Q4 2025 97$145.0MNVO, AMZN, MSFT, GOOGL, GOOG
Q3 2025 104$143.2MNVO, MSFT, AMZN, MCO, GOOGL
Q2 2025Amended 102$133.0MNVO, MSFT, AMZN, MCO, TRI
Q1 2025 107$132.3MNVO, AMZN, MSFT, MCO, TRI
Q4 2024 110$146.6MNVO, AMZN, MSFT, MCO, GOOG
Q3 2024 104$153.8MNVO, MSFT, AMZN, MCO, TRI
Q2 2024 101$163.8MNVO, MSFT, AMZN, MCO, GOOG
Q1 2024 102$161.3MNVO, MSFT, AMZN, MCO, ACLS