1y return+21.2%S&P 500 +20.9%
3y return+41.2%S&P 500 +68.5%
5y return+39.5%S&P 500 +74.5%
These returns are for its stock picks as disclosed on Form 13F: last quarter's holdings, valued at this quarter's prices. They miss trades within each quarter, short positions, options, bonds, cash and fees, so they aren't the returns its clients got.
$100 invested in its stock picks
Since December 31, 2017: $254 against $280 in the S&P 500.2
Penbrook Management LLCS&P 500 (SPY)
Top holdings
At the end of June 30, 2026. Change is in shares since the quarter before.2
| Stock | Value | Share of portfolio | Change |
|---|---|---|---|
| NVONovo-nordisk A S Adr | $15.2M | 9.7% | |
| AMZNAmazon Com Inc | $12.3M | 7.9% | |
| GOOGLAlphabet Inc Cap Stk Cl A | $8.3M | 5.3% | |
| MSFTMicrosoft Corp | $8.2M | 5.2% | −1.5% |
| GOOGAlphabet Inc Cap Stk Cl C | $8.0M | 5.1% | |
| MCOMoodys Corp | $6.2M | 3.9% | |
| ELVAElectrovaya Inc | $3.4M | 2.2% | +10.5% |
| CYRXCryoport Inc Com Par $0.001 | $3.2M | 2.0% | +9.1% |
| VMDViemed Healthcare Inc | $3.2M | 2.0% | +1.8% |
| MRVLMarvell Technology Inc | $2.9M | 1.8% | |
| PLABPhotronics Inc | $2.9M | 1.8% | −7.9% |
| SASeabridge Gold Inc | $2.9M | 1.8% | New |
| EXTRExtreme Networks Inc | $2.7M | 1.7% | |
| PLPlanet Labs Pbc Com Cl A | $2.7M | 1.7% | −22.7% |
| Prothena Corp PLC ShsCUSIP G72800108 | $2.7M | 1.7% | |
| ALKTAlkami Technology Inc | $2.5M | 1.6% | +10.1% |
| Allot Ltd ShsCUSIP M0854Q105 | $2.4M | 1.6% | New |
| CSCOCisco Sys Inc | $2.2M | 1.4% | |
| BXBlackstone Inc | $2.1M | 1.4% | |
| MGNIMagnite Inc | $2.1M | 1.4% | |
| ACLSAxcelis Technologies Inc | $2.1M | 1.3% | −9.9% |
| CURICuriositystream Inc Com Cl A | $2.0M | 1.3% | +13.3% |
| TRIThomson Reuters Corp | $2.0M | 1.3% | New |
| NNYNuveen N Y Mun Value Fd | $1.9M | 1.2% | |
| VETVermilion Energy Inc | $1.9M | 1.2% |
Best picks still held
How each current holding has done since the quarter it first appeared in its filings (up to six years back).
| Stock | Held since | Return since | Now worth |
|---|---|---|---|
| TRGPTarga Res Corp | June 30, 2020 | +1236.0% | $1.8M |
| PLPlanet Labs Pbc Com Cl A | June 30, 2023 | +928.9% | $2.7M |
| ACLSAxcelis Technologies Inc | June 30, 2020 | +580.3% | $2.1M |
| GOOGLAlphabet Inc Cap Stk Cl A | June 30, 2020 | +404.0% | $8.3M |
| GOOGAlphabet Inc Cap Stk Cl C | June 30, 2020 | +399.9% | $8.0M |
| ELVAElectrovaya Inc | December 31, 2024 | +323.4% | $3.4M |
| WMBWilliams Cos Inc | June 30, 2020 | +290.8% | $1.4M |
| PLABPhotronics Inc | June 30, 2020 | +192.3% | $2.9M |
| BRK/BBerkshire Hathaway Inc Del Cl B New | June 30, 2020 | +180.3% | $1.6M |
| ABBVAbbvie Inc | June 30, 2020 | +156.3% | $1.3M |
Sold off last quarter
- Seabridge Gold Inc ComCUSIP 811916105 was $2.7M
- Thomson Reuters Corp ComCUSIP 884903808 was $2.2M
- Exxon Mobil Corp ComCUSIP 30231G102 was $217K
- NKENike Inc Cl B was $209K
- XGNExagen Inc Com was $40K
Quarter by quarter
| Quarter | Its picks | S&P 500 |
|---|---|---|
| June 30, 2026 | +16.9% | +14.8% |
| March 31, 2026 | −4.3% | −4.6% |
| December 31, 2025 | +2.3% | +2.4% |
| September 30, 2025 | +5.8% | +7.8% |
| June 30, 2025 | +9.2% | +10.5% |
| March 31, 2025 | −8.1% | −4.6% |
| December 31, 2024 | −3.8% | +2.1% |
| September 30, 2024 | −3.3% | +5.4% |
| June 30, 2024 | +3.9% | +4.0% |
| March 31, 2024 | +10.5% | +10.0% |
| December 31, 2023 | +8.6% | +11.2% |
| September 30, 2023 | +0.1% | −3.6% |
| June 30, 2023 | +7.0% | +8.3% |
| March 31, 2023 | +10.9% | +7.0% |
| December 31, 2022 | +8.3% | +7.1% |
| September 30, 2022 | −5.4% | −5.3% |
| June 30, 2022 | −16.7% | −16.5% |
| March 31, 2022 | −7.1% | −4.9% |
| December 31, 2021 | +5.1% | +10.7% |
| September 30, 2021 | −0.2% | +0.3% |
Sources
Every number on this page points here. Each one links to the public record.
- 1SEC EDGAR: Penbrook Management LLC Form 13F filingshttps://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1381055&type=13F-HR&dateb=&owner=include&count=40CIK 1381055
- 2SEC: 13F for the quarter ended June 30, 2026https://www.sec.gov/Archives/edgar/data/1381055/000138105526000003/Filed July 23, 2026 · accession 0001381055-26-000003