Penbrook Management LLC

Registered adviser

CIK

1381055

Location

NEW YORK, NY

Portfolio Value

Small $151,559,867

Diversification

Diversified

Filing Date

Global Rank

#7,277 / 8,819 ▲ 96 · as of Jun 2026

Top Industry

Internet Content & Information 11.4%

Period ended 29 days ago

Filed Oct 16, 2026 · 13d

27 quarters · since Mar 2020

Regulatory profile

From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.

Holder type

Registered adviser

Form ADV roster, Oct 1, 2026

Form ADV adviser

CRD 127269

Roster of Oct 1, 2026

Regulatory AUM

$175,390,001

Main clients

Individuals and high net worth (84% of AUM)

Private funds

1 fund · Hedge funds

Focus by fund count, roster of Oct 1, 2026

$9,261,258 gross assets

Private funds on Schedule D 7.B.(1)

As filed Feb 9, 2024; SEC's bulk Form ADV archive ends with 2024 filings.

$7,951,873 gross assets in 1 fund Hedge funds $7,951,873 (1)

Form ADV history

Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.

Rosters	Regulatory AUM	Main clients
Mar 2026 to Oct 2026	$175,390,001	Individuals and high net worth (84%)
Feb 2025 to Feb 2026	$169,783,102	Individuals and high net worth (86%)
Mar 2024 to Jan 2025	$175,156,391	Individuals and high net worth (87%)
May 2023 to Feb 2024	$146,364,586	Individuals and high net worth (83%)
Apr 2023	$146,364,586	Individuals and high net worth (83%)
Apr 2022 to Mar 2023	$181,924,992	Individuals and high net worth (81%)

3 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.

Style

Diversified active

Top 10 weight 47.0%, 26.6 effective positions, active share 79.4% against the S&P 500 as of 2026-06-30; it meets none of the index-like, systematic-like or concentrated tests

Turnover

Low turnover

20.8% over the last four quarters (under 30%)

Horizon

Long horizon

Value-weighted holding period 20.1 quarters (12+), a floor since 67.0% of the book was already held when coverage starts

Closest benchmark: the S&P 500 as of 2026-06-30, active share 79.4%; sector active share 23.9% against the combined 13F book's sector weights.

Over time 26 measured quarters

How the bands are measured

Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

View clone backtest

Portfolio Concentration

102 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026

Top Position

10.3%

−0.1 pts

Top 5

38.0%

+1.0 pts

Top 10

48.1%

+1.1 pts

HHI

378

Diversified+2

Portfolio Trend

27 quarters · across all stocks

Sector Breakdown

As of Sep 30, 2026

Sector	% Portfolio	Value	Positions
Technology	25.8%	$39,100,593	25
Healthcare	15.6%	$23,684,676	14
Communication Services	14.7%	$22,290,871	7
Energy	10.4%	$15,716,355	18
Financial Services	10.0%	$15,191,469	14
Consumer Cyclical	9.6%	$14,475,541	3
Industrials	7.7%	$11,609,823	8
Unclassified	2.3%	$3,516,378	7
Basic Materials	2.2%	$3,343,676	2
Real Estate	1.5%	$2,321,790	3
Consumer Defensive	0.2%	$308,695	1

Last Quarter's Activity

Export CSV

Sep 30, 2026 vs Jun 30, 2026

Added To

Positions the filer increased

12 positions

Ticker	Company	Δ Shares	Shares	Value
SKYH	Sky Harbour Group Corp	+177,670	197,200	$1,867,484
ALLT	Allot Ltd.	+102,100	377,395	$3,185,213
ELVA	Electrovaya Inc.	+53,375	379,606	$2,475,031
TTI	Tetra Technologies Inc	+43,500	69,760	$409,491
CVE	Cenovus Energy Inc.	+12,820	42,700	$1,327,116
PAR	Par Technology Corp	+9,940	63,700	$876,512
PIM	Franklin Master Intermediate Income Trust	+5,000	152,063	$459,230
LINC	Lincoln Educational Services Corp	+1,400	14,115	$308,695
SONY	Sony Group Corp	+1,000	69,500	$1,635,335
HTGC	Hercules Capital, Inc.	+399	29,786	$500,702
IBM	International Business Machines Corp	+200	1,483	$326,156
ABBV	AbbVie Inc.	+100	5,252	$1,373,870
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
CURI	CuriosityStream Inc.	−376,250	388,550	$1,130,680
IOVA	Iovance Biotherapeutics, Inc.	−20,750	41,195	$610,509
PAYS	Paysign, Inc.	−17,890	39,420	$531,381
MGNI	Magnite, Inc.	−6,350	105,690	$2,669,729
KOPN	Kopin Corp	−5,300	82,975	$381,685
NVO	Novo Nordisk A S	−4,700	311,500	$11,808,965
BLFS	Biolife Solutions Inc	−2,810	36,895	$1,433,370
ALKT	Alkami Technology, Inc.	−2,575	138,010	$1,889,356
AQST	Aquestive Therapeutics, Inc.	−1,950	41,350	$191,450
BLZE	Backblaze, Inc.	−1,800	51,900	$726,081
CYRX	Cryoport, Inc.	−1,590	201,085	$3,498,879
VMD	Viemed Healthcare, Inc.	−1,230	275,948	$2,511,126
RITM	Rithm Capital Corp.	−863	38,337	$342,349
AMPL	Amplitude, Inc.	−750	47,955	$664,176
PROF	Profound Medical Corp.	−700	11,375	$65,975
OSS	One Stop Systems, Inc.	−675	38,200	$333,486
NPKI	NPK International Inc.	−500	67,325	$768,851
ASUR	Asure Software Inc	−430	87,705	$663,926
PL	Planet Labs PBC	−400	81,417	$1,334,424
ACLS	Axcelis Technologies Inc	−400	10,495	$1,376,734
TRGP	Targa Resources Corp.	−275	6,617	$1,788,641
PLAB	Photronics Inc	−200	88,855	$2,734,956
MSFT	Microsoft Corp	−200	21,720	$11,140,188
ABNB	Airbnb, Inc.	−200	8,750	$1,405,687
ET	Energy Transfer LP	−196	74,293	$0
No positions match the current search.

New Positions

Positions the filer opened this quarter

5 positions

Ticker	Company	Shares	Value
LMT	Lockheed Martin Corp	550	$280,087
XOM	ExxonMobil Holdings Corp	1,280	$208,320
NEM	NEWMONT Corp	1,780	$205,305
XGN	Exagen Inc.	11,300	$91,869
BAER	Bridger Aerospace Group Holdings, Inc.	81,925	$57,519
No positions match the current search.

Sold Out

Positions the filer fully exited

4 positions

Ticker	Company	Shares	Value
DV	DoubleVerify Holdings, Inc.	102,660	$1,112,834
AM	Antero Midstream Corp	9,900	$225,225
FAF	First American Financial Corp	3,000	$205,770
ONDS	Ondas Inc.	10,005	$82,441
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

102 tracked positions · $151,559,867 total · filing declares 102 positions · $169,493,759 · as of Sep 30, 2026

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

Showing 1–50 of 102 positions by value · page 1 of 3

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
AMZN	Amazon Com Inc Consumer Cyclical	Held	51,760	0	$12,896,004	+4.5%	8.51%
NVO	Novo Nordisk A S Healthcare	Reduced	311,500	-4,700	$11,808,965	−22.1%	7.79%
MSFT	Microsoft Corp Technology	Reduced	21,720	-200	$11,140,188	+36.2%	7.35%
GOOGL	Alphabet Inc. Communication Services	Held	23,170	0	$7,972,333	−3.7%	5.26%
GOOG	Alphabet Inc. Communication Services	Reduced	22,454	-100	$7,650,975	−4.0%	5.05%
MCO	Moodys Corp Financial Services	Held	13,600	0	$6,176,168	+0.3%	4.08%
CYRX	Cryoport, Inc. Industrials	Reduced	201,085	-1,590	$3,498,879	+10.0%	2.31%
ALLT	Allot Ltd. Technology	Added	377,395	+102,100	$3,185,213	+30.7%	2.10%
SA	Seabridge Gold Inc Basic Materials	Reduced	110,740	-175	$3,138,371	+9.9%	2.07%
PLAB	Photronics Inc Technology	Reduced	88,855	-200	$2,734,956	−5.6%	1.80%
MGNI	Magnite, Inc. Communication Services	Reduced	105,690	-6,350	$2,669,729	+25.5%	1.76%
MRVL	Marvell Technology, Inc. Technology	Held	9,730	0	$2,570,763	−11.3%	1.70%
VMD	Viemed Healthcare, Inc. Healthcare	Reduced	275,948	-1,230	$2,511,126	−20.5%	1.66%
ELVA	Electrovaya Inc. Industrials	Added	379,606	+53,375	$2,475,031	−27.7%	1.63%
TRI	Thomson Reuters Corp Industrials	Held	24,381	0	$2,373,002	+19.2%	1.57%
PRTA	Prothena Corp Public Ltd Co Healthcare	Held	271,720	0	$2,277,013	−14.4%	1.50%
VET	Vermilion Energy Inc. Energy	Held	197,825	0	$2,253,226	+21.6%	1.49%
BX	Blackstone Inc. Financial Services	Held	18,150	0	$2,034,433	−4.7%	1.34%
CSCO	Cisco Systems, Inc. Technology	Held	18,350	0	$1,975,010	−8.4%	1.30%
ALKT	Alkami Technology, Inc. Technology	Reduced	138,010	-2,575	$1,889,356	−25.8%	1.25%
SKYH	Sky Harbour Group Corp Real Estate	Added	197,200	+177,670	$1,867,484	+871.8%	1.23%
BTE	Baytex Energy Corp. Energy	Held	399,350	0	$1,809,055	+13.2%	1.19%
EXTR	Extreme Networks Inc Technology	Held	84,025	0	$1,802,336	−33.7%	1.19%
TRGP	Targa Resources Corp. Energy	Reduced	6,617	-275	$1,788,641	−3.2%	1.18%
NNY	Nuveen New York Municipal Value Fund Financial Services	Held	213,727	0	$1,662,796	−11.0%	1.10%
SONY	Sony Group Corp Technology	Added	69,500	+1,000	$1,635,335	+19.0%	1.08%
ADP	Automatic Data Processing Inc Technology	Held	6,300	0	$1,625,778	+15.2%	1.07%
BRK-B	Berkshire Hathaway Inc Financial Services	Reduced	3,240	-50	$1,613,358	−2.0%	1.06%
BLFS	Biolife Solutions Inc Healthcare	Reduced	36,895	-2,810	$1,433,370	+27.8%	0.95%
ABNB	Airbnb, Inc. Consumer Cyclical	Reduced	8,750	-200	$1,405,687	+9.8%	0.93%
VZ	Verizon Communications Inc Communication Services	Held	30,424	0	$1,395,548	+8.3%	0.92%
ACLS	Axcelis Technologies Inc Technology	Reduced	10,495	-400	$1,376,734	−33.3%	0.91%
ABBV	AbbVie Inc. Healthcare	Added	5,252	+100	$1,373,870	+6.0%	0.91%
PL	Planet Labs PBC Industrials	Reduced	81,417	-400	$1,334,424	−50.8%	0.88%
CVE	Cenovus Energy Inc. Energy	Added	42,700	+12,820	$1,327,116	+79.0%	0.88%
WMB	Williams Companies, Inc. Energy	Reduced	19,080	-50	$1,296,867	−8.8%	0.86%
MESO	Mesoblast Ltd Healthcare	Held	87,075	0	$1,275,648	+8.3%	0.84%
META	Meta Platforms, Inc. Communication Services	Held	1,700	0	$1,232,806	+28.7%	0.81%
SPY	Spdr S&P 500 ETF Trust	Held	1,605	0	$1,224,021	+2.1%	0.81%
NVDA	Nvidia Corp Technology	Reduced	5,278	-45	$1,205,389	+13.2%	0.80%
CURI	CuriosityStream Inc. Communication Services	Reduced	388,550	-376,250	$1,130,680	−44.4%	0.75%
HESM	Hess Midstream LP Energy	Reduced	30,005	-50	$1,121,286	−0.8%	0.74%
DAIO	Data I/O Corp Technology	Held	355,850	0	$1,042,640	−25.6%	0.69%
USAC	USA Compression Partners, LP Energy	Held	41,038	0	$1,020,615	−5.8%	0.67%
OKE	Oneok Inc Energy	Held	11,310	0	$964,403	−1.9%	0.64%
SHEL	Shell plc Energy	Held	9,400	0	$893,470	+22.6%	0.59%
PAR	Par Technology Corp Technology	Added	63,700	+9,940	$876,512	−6.4%	0.58%
BPOP	Popular, Inc. Financial Services	Held	5,300	0	$823,885	−5.3%	0.54%
EMR	Emerson Electric Co Industrials	Held	5,300	0	$822,030	+8.3%	0.54%
NVS	Novartis AG Healthcare	Held	5,540	0	$789,837	−9.0%	0.52%

Showing the top 50 of 102 positions. Create a free account to see every position, past quarters, search, filters and CSV export.

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.