Penbrook Management LLC

CIK

1381055

Location

NEW YORK, NY

Portfolio Value

Small $124,586,566

Diversification

Diversified

Filing Date

Global Rank

#5,217 / 8,603 ▼ 29 · as of Mar 2026

Top Industry

Drug Manufacturers - General 11.6%

3Y Alpha vs SPY

-7.9%

Period ended 3 months ago

Filed Apr 21, 2026 · 3mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+43.7%

SPY

+76.0%

Annualised alpha

-7.9%

Max drawdown

−28.3%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

88 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

9.3%

−2.4 pts

Top 5

34.7%

−4.1 pts

Top 10

46.9%

−5.3 pts

HHI

344

Diversified−70

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Technology	24.5%	$30,541,655	23
Healthcare	17.7%	$22,086,767	14
Energy	12.2%	$15,202,371	16
Financial Services	11.7%	$14,551,124	13
Communication Services	10.8%	$13,445,221	6
Consumer Cyclical	9.7%	$12,119,428	3
Industrials	8.8%	$10,930,001	7
Basic Materials	2.2%	$2,720,356	1
Unclassified	1.9%	$2,343,142	3
Consumer Defensive	0.4%	$518,263	1
Real Estate	0.1%	$128,238	1

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

14 positions

Ticker	Company	Δ Shares	Shares	Value
CURI	CuriosityStream Inc.	+327,850	675,150	$1,998,444
CYRX	Cryoport, Inc.	+132,940	185,775	$1,538,217
MGNI	Magnite, Inc.	+81,075	112,190	$1,332,817
PAYS	Paysign, Inc.	+24,960	55,785	$329,131
PAR	Par Technology Corp	+15,960	35,775	$476,880
IOVA	Iovance Biotherapeutics, Inc.	+8,500	42,445	$148,981
BX	Blackstone Inc.	+3,350	18,150	$2,087,068
VMD	Viemed Healthcare, Inc.	+850	272,398	$2,508,785
BLZE	Backblaze, Inc.	+800	72,150	$248,917
ASUR	Asure Software Inc	+400	89,635	$770,861
HTGC	Hercules Capital, Inc.	+293	15,060	$222,436
BLFS	Biolife Solutions Inc	+200	23,155	$441,797
UTG	Reaves Utility Income Fund	+100	6,125	$240,590
NKE	NIKE, Inc.	+75	3,960	$209,167
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
PL	Planet Labs PBC	−189,375	105,870	$2,959,066
ELVA	Electrovaya Inc.	−54,505	295,356	$2,309,683
AEHR	Aehr Test Systems	−35,385	79,515	$2,948,416
FBP	First Bancorp /Pr/	−21,400	23,500	$501,960
TTI	Tetra Technologies Inc	−17,565	26,410	$225,013
AQST	Aquestive Therapeutics, Inc.	−16,595	25,565	$106,094
PLAB	Photronics Inc	−13,950	96,730	$3,908,859
FNF	Fidelity National Financial, Inc.	−11,153	9,168	$425,211
GBDC	GOLUB CAPITAL BDC, Inc.	−9,000	14,680	$185,848
BPOP	Popular, Inc.	−6,350	5,500	$737,935
LINC	Lincoln Educational Services Corp	−4,286	12,740	$518,263
ACLS	Axcelis Technologies Inc	−3,800	12,095	$1,125,802
VZ	Verizon Communications Inc	−1,236	29,899	$1,500,929
QQQ	Invesco Qqq Trust, Series 1	−945	925	$533,891
MSFT	Microsoft Corp	−505	22,245	$8,234,431
MESO	Mesoblast Ltd	−500	87,075	$1,339,213
KOPN	Kopin Corp	−400	114,575	$257,793
IBM	International Business Machines Corp	−344	1,283	$310,986
NVO	Novo Nordisk A S	−200	316,200	$11,620,350
TRI	Thomson Reuters Corp /Can/	−174	24,774	$2,229,164
TRGP	Targa Resources Corp.	−136	6,892	$1,728,031
SPY	Spdr S&P 500 ETF Trust	−115	1,605	$1,043,795
XGN	Exagen Inc.	−100	13,330	$39,990
NVS	Novartis AG	−70	5,540	$846,235
ABBV	AbbVie Inc.	−60	5,170	$1,124,423
No positions match the current search.

New Positions

Positions the filer opened this quarter

7 positions

Ticker	Company	Shares	Value
PRTA	Prothena Corp Public Ltd Co	271,720	$2,641,118
EXTR	Extreme Networks Inc	83,525	$1,259,557
COP	Conocophillips	2,025	$267,300
AM	Antero Midstream Corp	9,900	$225,720
MRK	Merck & Co., Inc.	1,700	$204,493
DX	Dynex Capital Inc	10,050	$128,238
PROF	Profound Medical Corp.	12,300	$79,704
No positions match the current search.

Sold Out

Positions the filer fully exited

12 positions

Ticker	Company	Shares	Value
SYF	Synchrony Financial	15,500	$1,293,165
COHU	Cohu Inc	38,300	$891,241
GPN	Global Payments Inc	5,115	$395,901
BBSI	Barrett Business Services Inc	8,800	$318,648
FAF	First American Financial Corp	4,300	$264,192
WBS	Webster Financial Corp	4,180	$263,089
AFL	Aflac Inc	1,950	$215,026
FIS	Fidelity National Information Services, Inc.	3,224	$214,267
JPM	Jpmorgan Chase & Co	660	$212,665
TFPM	Triple Flag Precious Metals Corp.	6,089	$202,276
BTQ	BTQ Technologies Corp.	10,570	$54,118
MIN	Mfs Intermediate Income Trust	18,750	$48,937
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

88 positions · $124,586,566 total · as of Mar 31, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Real Estate Technology

Showing 1–50 of 88 positions by value · page 1 of 2

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
NVO	Novo Nordisk A S Healthcare	Reduced	316,200	-200	$11,620,350	−27.8%	9.33%
AMZN	Amazon Com Inc Consumer Cyclical	Held	51,760	0	$10,780,055	−9.8%	8.65%
MSFT	Microsoft Corp Technology	Reduced	22,245	-505	$8,234,431	−25.2%	6.61%
GOOGL	Alphabet Inc. Communication Services	Held	23,170	0	$6,662,765	−8.1%	5.35%
MCO	Moodys Corp /De/ Financial Services	Held	13,600	0	$5,933,000	−14.6%	4.76%
PLAB	Photronics Inc Technology	Reduced	96,730	-13,950	$3,908,859	+10.4%	3.14%
PL	Planet Labs PBC Industrials	Reduced	105,870	-189,375	$2,959,066	−49.2%	2.38%
AEHR	Aehr Test Systems Technology	Reduced	79,515	-35,385	$2,948,416	+27.1%	2.37%
VET	Vermilion Energy Inc. Energy	Held	197,825	0	$2,726,028	+65.2%	2.19%
SA	Seabridge Gold Inc Basic Materials	Held	95,990	0	$2,720,356	−4.2%	2.18%
PRTA	Prothena Corp Public Ltd Co Healthcare	NEW	271,720	NEW	$2,641,118	NEW	2.12%
VMD	Viemed Healthcare, Inc. Healthcare	Added	272,398	+850	$2,508,785	+24.3%	2.01%
ELVA	Electrovaya Inc. Industrials	Reduced	295,356	-54,505	$2,309,683	−16.4%	1.85%
TRI	Thomson Reuters Corp /Can/ Industrials	Reduced	24,774	-174	$2,229,164	−32.3%	1.79%
BX	Blackstone Inc. Financial Services	Added	18,150	+3,350	$2,087,068	−8.5%	1.68%
ALKT	Alkami Technology, Inc. Technology	Held	127,685	0	$2,000,823	−32.1%	1.61%
CURI	CuriosityStream Inc. Communication Services	Added	675,150	+327,850	$1,998,444	+51.4%	1.60%
NNY	Nuveen New York Municipal Value Fund Financial Services	Held	213,727	0	$1,784,620	−2.5%	1.43%
TRGP	Targa Resources Corp. Energy	Reduced	6,892	-136	$1,728,031	+33.3%	1.39%
BRK-B	Berkshire Hathaway Inc Financial Services	Reduced	3,300	-50	$1,581,360	−6.1%	1.27%
CYRX	Cryoport, Inc. Industrials	Added	185,775	+132,940	$1,538,217	+203.3%	1.23%
VZ	Verizon Communications Inc Communication Services	Reduced	29,899	-1,236	$1,500,929	+18.4%	1.20%
ET	Energy Transfer LP Energy	Held	74,489	0	$1,437,637	+17.0%	1.15%
CSCO	Cisco Systems, Inc. Technology	Held	18,350	0	$1,423,776	+0.7%	1.14%
SONY	Sony Group Corp Technology	Held	68,500	0	$1,417,950	−19.1%	1.14%
WMB	Williams Companies, Inc. Energy	Held	19,130	0	$1,392,281	+21.1%	1.12%
MESO	Mesoblast Ltd Healthcare	Reduced	87,075	-500	$1,339,213	−15.2%	1.07%
MGNI	Magnite, Inc. Communication Services	Added	112,190	+81,075	$1,332,817	+163.9%	1.07%
ADP	Automatic Data Processing Inc Technology	Held	6,300	0	$1,280,034	−21.0%	1.03%
EXTR	Extreme Networks Inc Technology	NEW	83,525	NEW	$1,259,557	NEW	1.01%
HESM	Hess Midstream LP Energy	Held	30,055	0	$1,168,237	+12.7%	0.94%
ABNB	Airbnb, Inc. Consumer Cyclical	Held	8,950	0	$1,130,206	−7.0%	0.91%
ACLS	Axcelis Technologies Inc Technology	Reduced	12,095	-3,800	$1,125,802	−11.8%	0.90%
ABBV	AbbVie Inc. Healthcare	Reduced	5,170	-60	$1,124,423	−5.9%	0.90%
USAC	USA Compression Partners, LP Energy	Held	41,038	0	$1,112,950	+17.9%	0.89%
SPY	Spdr S&P 500 ETF Trust	Reduced	1,605	-115	$1,043,795	−11.0%	0.84%
OKE	Oneok Inc /New/ Energy	Held	11,310	0	$1,022,310	+23.0%	0.82%
DV	DoubleVerify Holdings, Inc. Communication Services	Held	102,910	0	$977,645	−17.0%	0.78%
NPKI	NPK International Inc. Industrials	Held	67,250	0	$974,452	+21.6%	0.78%
META	Meta Platforms, Inc. Communication Services	Held	1,700	0	$972,621	−13.3%	0.78%
MRVL	Marvell Technology, Inc. Technology	Held	9,730	0	$963,756	+16.6%	0.77%
NVDA	Nvidia Corp Technology	Held	5,223	0	$910,891	−6.5%	0.73%
DAIO	Data I/O Corp Technology	Held	356,850	0	$902,830	−20.2%	0.72%
SHEL	Shell plc Energy	Held	9,400	0	$874,200	+26.6%	0.70%
NVS	Novartis AG Healthcare	Reduced	5,540	-70	$846,235	+9.4%	0.68%
CVE	Cenovus Energy Inc. Energy	Held	29,880	0	$792,716	+56.8%	0.64%
ASUR	Asure Software Inc Technology	Added	89,635	+400	$770,861	−8.3%	0.62%
SGOL	abrdn Gold ETF Trust	Held	17,155	0	$765,456	+8.6%	0.61%
BPOP	Popular, Inc. Financial Services	Reduced	5,500	-6,350	$737,935	−50.0%	0.59%
EMR	Emerson Electric Co Industrials	Held	5,300	0	$694,406	−1.3%	0.56%