PM

Penbrook Management LLC

Diversified strategyQuality / disciplined sizingMomentum follower

Total reported value

$132.1M

Reporting period: 2026-03-31 · Number of holdings: 93

Penbrook Management LLC disclosed 93 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $132.1M and a quarterly turnover rate of 29.2%.

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Personality snowflake

Concentration
13.2
Portfolio Stability
29.16
Momentum/Contrarian
70.9
Sector conviction
61.41
Diversification
100
Sizing Uniformity
85.54

Recent moves

  • Trim NVO

    -0.1%　-$4.5M

  • Trim PL

    -64.1%　-$2.9M

  • Trim MSFT

    -2.2%　-$2.8M

  • Add VET

    0.0%　$1.1M

  • Add CYRX

    +251.6%　$1.0M

  • Add MGNI

    +260.6%　$827.8K

Holdings Map

New buyAddUnchangedTrim

Top 10 holdings by weight

Full holdings list this quarter

#TickerIssuerAsset SubclassWeightWeight ChangeShares Change4Q Trend
1NVONovo-nordisk A/s-spons AdrStock-Healthcare8.80%-2.30%-0.06%
2AMZNAmazon.com INCStock-Consumer Disc8.16%-0.08%—
3MSFTMicrosoft CORPStock-Tech6.24%-1.35%-2.22%
4GOOGLAlphabet Inc-cl AStock-Comm Services5.05%+0.05%—
5GOOGAlphabet Inc-cl CStock-Comm Services4.90%+0.02%—
6MCOMoody's CORPStock-Financials4.49%-0.30%—
7PLABPhotronics INCStock-Other2.96%+0.52%-12.60%
8PLPlanet Labs PbcStock-Industrials2.24%-1.78%-64.14%
9AEHRAehr Test SystemsStock-Other2.23%+0.63%-30.80%
10SEA1EURSeabridge Gold INCStock-Other2.06%——
11VETVermilion Energy INCStock-Other2.06%+0.92%—
12PRTAProthena Corporation plcStock-Other2.00%+2.00%NEW
13VMDViemed Healthcare INCStock-Other1.90%+0.51%+0.31%
14ELVAElectrovaya INCStock-Other1.74%-0.17%-15.58%
15TRI4EURThomson Reuters CORPStock-Other1.69%-0.58%-0.70%
16BXBlackstone INCStock-Financials1.58%+0.01%+22.64%
17ALKTAlkami Technology INCStock-Other1.52%-0.51%—
18CURICuriositystream INCStock-Other1.51%+0.60%+94.40%
19NNYNuveen New York Muni ValStock-Other1.35%——
20TRGPTarga Resources CORPStock-Energy1.31%+0.42%-1.94%
21BRK-BBerkshire Hathaway Inc-cl BStock-Other1.20%—-1.49%
22CYRXCryoport INCStock-Other1.16%+0.81%+251.61%
23VZVerizon Communications INCStock-Comm Services1.14%+0.27%-3.97%
24ETEnergy Transfer LPStock-Energy1.09%+0.24%—
25CSCOCisco Systems INCStock-Tech1.08%——
26SONYSony Group CORP - Sp AdrStock-Tech1.07%-0.14%—
27WMBWilliams Cos INCStock-Energy1.05%+0.26%—
28MESOMesoblast Ltd- Spon AdrStock-Other1.01%-0.08%-0.57%
29MGNIMagnite INCStock-Other1.01%+0.66%+260.57%
30ADPAutomatic Data ProcessingStock-Tech0.97%-0.15%—
31EXTRExtreme Networks INCStock-Other0.95%+0.95%NEW
32HESMHess Midstream LP - Class AStock-Other0.88%——
33ABNBAirbnb Inc-class AStock-Consumer Disc0.86%——
34ACLSAxcelis Technologies INCStock-Tech0.85%—-23.91%
35ABBVAbbvie INCStock-Healthcare0.85%—-1.15%
36USACUSA Compression Partners LPStock-Other0.84%——
37SPYSs Spdr S&p 500 ETF Trust-usETF-Large Cap & Growth0.79%—-6.69%
38OKEOneok INCStock-Energy0.77%+0.20%—
39DVDoubleverify Holdings INCStock-Other0.74%-0.07%—
40NPKINpk International INCStock-Other0.74%——
41METAMeta Platforms Inc-class AStock-Comm Services0.74%——
42MRVLMarvell Technology INCStock-Tech0.73%——
43NVDANvidia CORPStock-Tech0.69%——
44DAIOData I/o CORPStock-Other0.68%-0.10%—
45SHELShell Plc-adrStock-Energy0.66%——
46NVSNovartis Ag-sponsored AdrStock-Healthcare0.64%—-1.25%
47CVECenovus Energy INCStock-Energy0.60%+0.25%—
48ASURAsure Software INCStock-Other0.58%—+0.45%
49SGOLAbrdn Physical Gold SharesETF-Commodities0.58%——
50BPOPPopular INCStock-Financials0.56%-0.46%-53.59%
1–50 of 93

Holding changes this quarter

Penbrook Management LLC's most significant position changes for 2026-03-31: New buy: Prothena Corporation plc (PRTA); Sold out: Synchrony Financial (SYF); New buy: Extreme Networks INC (EXTR); Sold out: Cohu INC (COHU); Sold out: Global Payments INC (GPN).

Position changes disclosed by Penbrook Management LLC for the quarter ending 2026-03-31, including ticker, issuer, weight change, shares change, and action
#TickerIssuerWeight ChangeShares ChangeAction
1VETVermilion Energy INC+0.9%—Unchanged
2CYRXCryoport INC+0.8%+251.61%Add
3MGNIMagnite INC+0.7%+260.57%Add
4AEHRAehr Test Systems+0.6%-30.80%Trim
5CURICuriositystream INC+0.6%+94.40%Add
6PLABPhotronics INC+0.5%-12.60%Trim
7VMDViemed Healthcare INC+0.5%+0.31%Add
8TRGPTarga Resources CORP+0.4%-1.94%Trim
9VZVerizon Communications INC+0.3%-3.97%Trim
10WMBWilliams Cos INC+0.3%—Unchanged
11CVECenovus Energy INC+0.3%—Unchanged
12ETEnergy Transfer LP+0.2%—Unchanged
13OKEOneok INC+0.2%—Unchanged
14GOOGLAlphabet Inc-cl A+0.1%—Unchanged
15GOOGAlphabet Inc-cl C0%—Unchanged
16BXBlackstone INC0%+22.64%Add
17DVDoubleverify Holdings INC-0.1%—Unchanged
18AMZNAmazon.com INC-0.1%—Unchanged
19MESOMesoblast Ltd- Spon Adr-0.1%-0.57%Trim
20DAIOData I/o CORP-0.1%—Unchanged
21SONYSony Group CORP - Sp Adr-0.1%—Unchanged
22PARPar Technology Corp/del-0.1%+80.55%Add
23ADPAutomatic Data Processing-0.2%—Unchanged
24ELVAElectrovaya INC-0.2%-15.58%Trim
25FBPFirst Bancorp Puerto Rico-0.3%-47.66%Trim
26MCOMoody's CORP-0.3%—Unchanged
27QQQInvesco Qqq Trust Series 1-0.4%-50.53%Trim
28FNFFidelity National Financial-0.5%-54.88%Trim
29BPOPPopular INC-0.5%-53.59%Trim
30ALKTAlkami Technology INC-0.5%—Unchanged
31TRI4EURThomson Reuters CORP-0.6%-0.70%Trim
32MSFTMicrosoft CORP-1.4%-2.22%Trim
33PLPlanet Labs Pbc-1.8%-64.14%Trim
34NVONovo-nordisk A/s-spons Adr-2.3%-0.06%Trim
35PRTAProthena Corporation plc—NEWNew buy
36SYFSynchrony Financial—EXITSold out
37EXTRExtreme Networks INC—NEWNew buy
38COHUCohu INC—EXITSold out
39GPNGlobal Payments INC—EXITSold out
40BBSIBarrett Business Svcs INC—EXITSold out
41COPConocophillips—NEWNew buy
42FAFFirst American Financial—EXITSold out
43WBSWebster Financial CORP—EXITSold out
44AMAntero Midstream CORP—NEWNew buy
45XOMExxon Mobil CORP—NEWNew buy
46AFLAflac INC—EXITSold out
47FISFidelity National Info Serv—EXITSold out
48JPMJpmorgan Chase & Co—EXITSold out
49MRKMerck & Co. INC.—NEWNew buy
50TFPMTriple Flag Precious Met—EXITSold out

FAQ

What is Penbrook Management LLC and what type of investor is it?
Penbrook Management LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-03-31), the firm manages a tracked equity portfolio valued at approximately $132.1M, spread across 93 disclosed positions.
What are Penbrook Management LLC's largest equity positions?
Based on the latest 13F filing, Penbrook Management LLC's top holdings by market value are: 1. Novo-nordisk A/s-spons Adr (NVO) — $11.6M (8.8%) 2. Amazon.com INC (AMZN) — $10.8M (8.2%) 3. Microsoft CORP (MSFT) — $8.2M (6.2%) 4. Alphabet Inc-cl A (GOOGL) — $6.7M (5.0%) 5. Alphabet Inc-cl C (GOOG) — $6.5M (4.9%)
What changes did Penbrook Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Penbrook Management LLC made 36 notable position adjustments: 6 new positions were initiated, 6 existing holdings were added to, 14 positions were partially reduced, and 10 were completely exited. The largest of these moves: New buy: Prothena Corporation plc (PRTA); Sold out: Synchrony Financial (SYF); New buy: Extreme Networks INC (EXTR); Sold out: Cohu INC (COHU); Sold out: Global Payments INC (GPN)
What sectors does Penbrook Management LLC focus on?
Penbrook Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio: • Communication Services: 25.1% • Health Care: 22.4% • Information Technology: 19.7% • Consumer Discretionary: 19.5% • Financials: 12.1% • Energy: 1.2%

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