Penbrook Management Llc
Institutional manager — quarterly 13F holdings, Q ending 2026-03-31
Reported value
$132.1M
Q ending 2026-03-31
Prior quarter
$145.0M
Q ending 2025-12-31
Change
-8.9% QoQ · -0.2% YoY
Positions
93
reported holdings
Largest positions
All 93 reported positions, Q ending 2026-03-31. A manager can hold shares, calls and puts on the same security at once — such positions are listed as separate rows. Type: Shares = common stock, Put/Call = option positions (valued at the underlying), Principal = debt. Tickers link to stock pages where covered.
| Holding | Ticker | Type | Value ▼ | Shares |
|---|---|---|---|---|
| Novo-Nordisk A S Adr | NVO | Shares | $11.6M | 316K |
| Amazon Com Inc Com | AMZN | Shares | $10.8M | 52K |
| Microsoft Corp Com | MSFT | Shares | $8.2M | 22K |
| Alphabet Inc Cap Stk Cl A | GOOGL | Shares | $6.7M | 23K |
| Alphabet Inc Cap Stk Cl C | GOOG | Shares | $6.5M | 23K |
| Moodys Corp Com | MCO | Shares | $5.9M | 14K |
| Photronics Inc Com | PLAB | Shares | $3.9M | 97K |
| Planet Labs Pbc Com Cl A | PL | Shares | $3.0M | 106K |
| Aehr Test Sys Com | AEHR | Shares | $2.9M | 80K |
| Seabridge Gold Inc Com | SEA1EUR | Shares | $2.7M | 96K |
| Vermilion Energy Inc Com | VET | Shares | $2.7M | 198K |
| Prothena Corp Plc Shs | Shares | $2.6M | 272K | |
| Viemed Healthcare Inc Com | VMD | Shares | $2.5M | 272K |
| Electrovaya Inc Com New | ELVA | Shares | $2.3M | 295K |
| Thomson Reuters Corp Com | TRI4EUR | Shares | $2.2M | 25K |
| Blackstone Inc Com | BX | Shares | $2.1M | 18K |
| Alkami Technology Inc Com | ALKT | Shares | $2.0M | 128K |
| Curiositystream Inc Com Cl A | CURI | Shares | $2.0M | 675K |
| Nuveen N Y Mun Value Fd Com | NNY | Shares | $1.8M | 214K |
| Targa Res Corp Com | TRGP | Shares | $1.7M | 7K |
| Berkshire Hathaway Inc Del Cl B Ne | BRK/B | Shares | $1.6M | 3K |
| Cryoport Inc Com Par $0.001 | CYRX | Shares | $1.5M | 186K |
| Verizon Communications Inc Com | VZ | Shares | $1.5M | 30K |
| Energy Transfer L P Com Ut Ltd Ptn | ET | Shares | $1.4M | 74K |
| Cisco Sys Inc Com | CSCO | Shares | $1.4M | 18K |
| Sony Group Corp Sponsored Adr | SONY | Shares | $1.4M | 69K |
| Williams Cos Inc Com | WMB | Shares | $1.4M | 19K |
| Mesoblast Ltd Spons Adr | MESO | Shares | $1.3M | 87K |
| Magnite Inc Com | MGNI | Shares | $1.3M | 112K |
| Automatic Data Processing Inc Com | ADP | Shares | $1.3M | 6K |
| Extreme Networks Inc Com | EXTR | Shares | $1.3M | 84K |
| Hess Midstream Lp Cl A Shs | HESM | Shares | $1.2M | 30K |
| Airbnb Inc Com Cl A | ABNB | Shares | $1.1M | 9K |
| Axcelis Technologies Inc Com New | ACLS | Shares | $1.1M | 12K |
| Abbvie Inc Com | ABBV | Shares | $1.1M | 5K |
| Usa Compression Partners Lp Com Un | USAC | Shares | $1.1M | 41K |
| State Street Spdr S&P 500 Etf | SPY | Shares | $1.0M | 2K |
| Oneok Inc New Com | OKE | Shares | $1.0M | 11K |
| Doubleverify Hldgs Inc Com | DV | Shares | $978K | 103K |
| Npk International Inc Com Shs | NPKI | Shares | $974K | 67K |
| Meta Platforms Inc Cl A | META | Shares | $973K | 2K |
| Marvell Technology Inc Com | MRVL | Shares | $964K | 10K |
| Nvidia Corporation Com | NVDA | Shares | $911K | 5K |
| Data I O Corp Com | DAIO | Shares | $903K | 357K |
| Shell Plc Spon Ads | SHEL | Shares | $874K | 9K |
| Novartis Ag Sponsored Adr | NVS | Shares | $846K | 6K |
| Cenovus Energy Inc Com | CVE | Shares | $793K | 30K |
| Asure Software Inc Com | ASUR | Shares | $771K | 90K |
| Abrdn Physical Gold Shares Etf | SGOL | Shares | $765K | 17K |
| Popular Inc Com New | BPOP | Shares | $738K | 6K |
| Emerson Elec Co Com | EMR | Shares | $694K | 5K |
| Western Midstream Partners Lp Com | WES | Shares | $655K | 16K |
| Range Res Corp Com | RRC | Shares | $643K | 14K |
| Regeneron Pharmaceuticals Com | REGN | Shares | $607K | 785 |
| Invesco Qqq Trust Series I | QQQ | Shares | $534K | 925 |
| Lincoln Edl Svcs Corp Com | LINC | Shares | $518K | 13K |
| First Bancorp Corporation Com New | FBP | Shares | $502K | 24K |
| Putnam Master Inter Income Tr Sh B | PIM | Shares | $481K | 147K |
| Par Technology Corp Com | PAR | Shares | $477K | 36K |
| Power Integrations Inc Com | POWI | Shares | $471K | 9K |
| Kulicke & Soffa Inds Inc Com | KLIC | Shares | $467K | 7K |
| Biolife Solutions Inc Com New | BLFS | Shares | $442K | 23K |
| Dorchester Minerals L P Com Unit | DMLP | Shares | $440K | 16K |
| Enterprise Prods Partners L P Com | EPD | Shares | $432K | 11K |
| Fidelity Natl Finl Inc Com Shs | FNF | Shares | $425K | 9K |
| Apple Inc Com | AAPL | Shares | $388K | 2K |
| Bristol-Myers Squibb Co Com | BMY | Shares | $379K | 6K |
| One Stop Sys Inc Com | OSS | Shares | $354K | 47K |
| Paysign Inc Com | PAYS | Shares | $329K | 56K |
| Invesco S&P 500 Equal Weight Etf | RSP | Shares | $321K | 2K |
| International Business Machs Com | IBM | Shares | $311K | 1K |
| Chevron Corporation Com | CVX | Shares | $285K | 1K |
| Conocophillips Com | COP | Shares | $267K | 2K |
| Kopin Corp Com | KOPN | Shares | $258K | 115K |
| Backblaze Inc Com Cl A | BLZE | Shares | $249K | 72K |
| State Street Spdr Portfolio S&P 50 | SPYM | Shares | $243K | 3K |
| Reaves Util Income Fd Com Sh Ben I | UTG | Shares | $241K | 6K |
| Jpmorgan Equity Premium Income Etf | JEPI | Shares | $239K | 4K |
| Antero Midstream Corp Com | AM | Shares | $226K | 10K |
| Tetra Technologies Inc Del Com | TTI | Shares | $225K | 26K |
| Hercules Capital Inc Com | HTGC | Shares | $222K | 15K |
| Exxon Mobil Corp Com | XOM | Shares | $217K | 1K |
| Nike Inc Cl B | NKE | Shares | $209K | 4K |
| Merck & Co Inc Com | MRK | Shares | $204K | 2K |
| Invesco Municipal Trust Com | VKQ | Shares | $190K | 20K |
| Golub Cap Bdc Inc Com | GBDC | Shares | $186K | 15K |
| Nuveen Mun Value Fd Inc Com | NUV | Shares | $180K | 20K |
| Iovance Biotherapeutics Inc Com | IOVA | Shares | $149K | 42K |
| Dynex Cap Inc Com | DX | Shares | $128K | 10K |
| Aquestive Therapeutics Inc Com | AQST | Shares | $106K | 26K |
| Ondas Inc Com New | ONDS | Shares | $90K | 10K |
| Profound Med Corp Com New | PROF | Shares | $80K | 12K |
| Exagen Inc Com | XGN | Shares | $40K | 13K |
Values as reported in public regulatory filings (USD); holdings are reported quarterly, up to 45 days after quarter end, and may contain reporting errors. Nothing here is investment advice.