Q3 2026 13F · SEC CIK 1381055

Penbrook Management LLC

Wealth managerFiled 2026-10-16 for Q3 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $169.5M
Reported positions: 102
Top holdings a year, 3 yrs: +4.1%
Assets under management: $175.4M

Penbrook Management LLC is a wealth manager that reported 102 positions worth $169.5M in its Q3 2026 13F, filed 2026-10-16. Its largest holdings were Targa Res Corp (TRGP, 10.6%), Amazon Com Inc (AMZN, 7.6%), Novo-Nordisk A S (NVO, 7.0%). A portfolio copying its top holdings returned 4.1% a year over the last 3 years, against 22.3% for the S&P 500.

Penbrook Management LLC holdings largest 50 of 102 positions.

Weights are shares of the filer's total reported 13F value, compared with Q2 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Penbrook Management LLC 13F holdings
Stock	% of 13F value	Q2 2026	Shares	Share change	Reported value
TRGPTarga Res Corp	10.6%	1.2%	6,617	-4.0%	$17.9M
AMZNAmazon Com Inc	7.6%	7.9%	51,760	+0.0%	$12.9M
NVONovo-Nordisk A S	7.0%	9.7%	311,500	-1.5%	$11.8M
MSFTMicrosoft Corp	6.6%	5.2%	21,720	-0.9%	$11.1M
GOOGLAlphabet Inc	4.7%	5.3%	23,170	+0.0%	$8.0M
GOOGAlphabet Inc	4.5%	5.1%	22,454	-0.4%	$7.7M
MCOMoodys Corp	3.6%	3.9%	13,600	+0.0%	$6.2M
CYRXCryoport Inc	2.1%	2.0%	201,085	-0.8%	$3.5M
ALLTAllot Ltd	1.9%	1.6%	377,395	+37.1%	$3.2M
SASeabridge Gold Ord	1.9%	1.8%	110,740	-0.2%	$3.1M
PLABPhotronics Inc	1.6%	1.8%	88,855	-0.2%	$2.7M
MGNIMagnite Inc	1.6%	1.4%	105,690	-5.7%	$2.7M
MRVLMarvell Technology Inc	1.5%	1.8%	9,730	+0.0%	$2.6M
VMDViemed Healthcare Inc	1.5%	2.0%	275,948	-0.4%	$2.5M
ELVAElectrovaya Inc	1.5%	2.2%	379,606	+16.4%	$2.5M
TRIThomson Reuters Corp	1.4%	1.3%	24,381	+0.0%	$2.4M
PRTAProthena Corp PLC Shs	1.3%	1.7%	271,720	+0.0%	$2.3M
VETVermilion Energy Inc	1.3%	1.2%	197,825	+0.0%	$2.3M
BXBlackstone Inc	1.2%	1.4%	18,150	+0.0%	$2.0M
CSCOCisco Sys Inc	1.2%	1.4%	18,350	+0.0%	$2.0M
ALKTAlkami Technology Inc	1.1%	1.6%	138,010	-1.8%	$1.9M
SKYHSky Harbour Group Corporatio	1.1%	—	197,200	—	$1.9M
BTEBaytex Energy Corp	1.1%	1.0%	399,350	+0.0%	$1.8M
EXTRExtreme Networks Inc	1.1%	1.7%	84,025	+0.0%	$1.8M
NNYNuveen N Y Mun Value Fd	1.0%	1.2%	213,727	+0.0%	$1.7M
SONYSony Group Corp	1.0%	0.9%	69,500	+1.5%	$1.6M
ADPAutomatic Data Processing in	1.0%	0.9%	6,300	+0.0%	$1.6M
BRK-BBerkshire Hathaway Inc Del	1.0%	1.1%	3,240	-1.5%	$1.6M
ETPCEnergy Transfer L P	0.9%	0.9%	74,293	-0.3%	$1.5M
BLFSBiolife Solutions Inc	0.8%	0.7%	36,895	-7.1%	$1.4M
ABNBAirbnb Inc	0.8%	0.8%	8,750	-2.2%	$1.4M
VZVerizon Communications Inc	0.8%	0.8%	30,424	+0.0%	$1.4M
ACLSAxcelis Technologies Inc	0.8%	1.3%	10,495	-3.7%	$1.4M
ABBVAbbvie Inc	0.8%	0.8%	5,252	+1.9%	$1.4M
PLPlanet Labs Pbc	0.8%	1.7%	81,417	-0.5%	$1.3M
CVECenovus Energy Inc	0.8%	—	42,700	—	$1.3M
WMBWilliams Cos	0.8%	0.9%	19,080	-0.3%	$1.3M
MESOMesoblast Ltd Spons ADR	0.8%	0.8%	87,075	+0.0%	$1.3M
METAMeta Platforms Inc	0.7%	0.6%	1,700	+0.0%	$1.2M
SPYState Str Spdr S&p 500 ETF T	0.7%	0.8%	1,605	+0.0%	$1.2M
NVDANvidia Corporation	0.7%	0.7%	5,278	-0.8%	$1.2M
CURICuriositystream Inc Cl A	0.7%	1.3%	388,550	-49.2%	$1.1M
HESMHess Midstream LP	0.7%	0.7%	30,005	-0.2%	$1.1M
DAIOData I O Corp	0.6%	0.9%	355,850	+0.0%	$1.0M
USACUSA Compression Partners LP	0.6%	0.7%	41,038	+0.0%	$1.0M
OKEOneok Inc New	0.6%	—	11,310	—	$964K
SHELShell PLC	0.5%	—	9,400	—	$893K
PARPar Technology Corp	0.5%	0.6%	63,700	+18.5%	$877K
BPOPPopular Inc	0.5%	0.6%	5,300	+0.0%	$824K
EMREmerson Elec Co	0.5%	—	5,300	—	$822K

What Penbrook Management LLC bought and sold in Q3 2026, against Q2 2026.

New positions

Q2 2026's filing was too long to tell new positions apart.

Share counts compared with the Q2 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +8.6% /yr; S&P 500 +11.7%
3 years: +4.1% /yr; S&P 500 +22.3%
5 years: +2.5% /yr; S&P 500 +10.6%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q3 2026	$169.5M	102
Q2 2026	$156.8M	101
Q1 2026	$132.1M	93
Q4 2025	$145.0M	97
Q3 2025	$143.2M	104
Q2 2025	$132.3M	107
Q1 2025	$132.3M	107
Q4 2024	$146.6M	110
Q3 2024	$153.8M	104
Q2 2024	$163.8M	101
Q1 2024	$161.3M	102
Q4 2023	$148.8M	102

Questions about Penbrook Management LLC's portfolio

What stocks does Penbrook Management LLC own?

Penbrook Management LLC's latest 13F, for Q3 2026 and filed Oct 16, 2026, lists 102 positions worth $169.5M. The largest are Targa Res Corp (TRGP) at 10.6%, Amazon Com Inc (AMZN) at 7.6%, Novo-Nordisk A S (NVO) at 7.0%, Microsoft Corp (MSFT) at 6.6% and Alphabet Inc (GOOGL) at 4.7%.

What did Penbrook Management LLC buy last quarter?

In Q3 2026, Penbrook Management LLC added Allot Ltd (ALLT) (+37.1% shares), Par Technology Corp (PAR) (+18.5% shares) and Electrovaya Inc (ELVA) (+16.4% shares), compared with its Q2 2026 filing.

What did Penbrook Management LLC sell last quarter?

In Q3 2026, Penbrook Management LLC cut from its top 50 Doubleverify Hldgs Inc (DV), cut from its top 50 Npk International Inc (NPKI), cut from its top 50 Oneok Inc New (OKE), cut from its top 50 Kulicke & Soffa Industries Inc (KLIC), cut from its top 50 Novartis AG (NVS), Curiositystream Inc Cl A (CURI) (-49.2% shares), Biolife Solutions Inc (BLFS) (-7.1% shares) and Magnite Inc (MGNI) (-5.7% shares), compared with its Q2 2026 filing.

How has Penbrook Management LLC's portfolio performed?

A portfolio copying Penbrook Management LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned +4.1% a year over the last 3 years, against +22.3% for the S&P 500. Over 1 year: +8.6% against +11.7%. Over 5 years: +2.5% a year against +10.6%.

When is Penbrook Management LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Penbrook Management LLC's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.

How much money does Penbrook Management LLC manage?

Penbrook Management LLC reported $175.4M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $169.5M.