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Michael J. Porro & Co. Financial Advisors, Inc. — 13F Holdings & Portfolio

CIK 2158818 · latest 13F-HR filed 2026-10-16

Backtest portfolio

Michael J. Porro & Co. Financial Advisors, Inc. manages $165.5M in 13F-reported U.S. long-equity assets across 134 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are COHR (6.67%), DELL (4.92%), MRVL (2.96%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 12 new positions and exited 17; 36 existing positions rose in reported value and 54 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$165.5M

Long-equity book

Holdings
134

Distinct positions

Period
2026-09-30

Filed 2026-10-16

Q/Q Activity
+12 / −17 / ↑36 / ↓54

vs 2026-06-30

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q3 26
COHR6.7% · -1%DELL4.9% · 0%MRVL3.0% · -3%BE2.7% · +5%ITGR2.3% · -2%ASML2.3% · -1%TSEM2.3% · -1%AAPL2.2% · -1%SMTC2.0% · -1%INTC2.0% · -3%GLW1.9% · -0%ARM1.9% · -0%IWM1.8% · -0%MSFT1.7% · -5%QCOM1.7% · 0%NVDA1.7% · +21%GOOG1.5% · -0%SMH1.5% · +0%NPO1.4% · -0%P1.4% · -1%STM1.4% · -0%VRTX1.4% · +15%PLTR1.3% · -1%QQQ1.2% · +0%STRL1.1% · -2%SN1.1% · -0%MRK1.0% · -1%TSM0.9% · 0%CRWD0.9% · +300%XYL0.9% · -1%HWM0.9% · 0%GM0.9% · -0%SPY0.9% · -1%TTMI0.9% · -3%TLT0.9% · -16%ST0.8% · -2%BA0.8% · -4%TSLA0.8% · +16%FSLR0.8% · -0%MSI0.8% · -0%WDS0.8% · -2%TPC0.7% · -1%WTS0.7% · 0%ACN0.7% · +6%IBM0.7% · -2%NXPI0.7% · -1%CVS0.7% · -2%DIA0.7% · +1%ABBV0.6% · 0%AMZN0.6% · +16%JCI0.6% · -1%SLB0.6% · -1%VECO0.6% · 0%VZ0.6% · -3%COST0.6% · -1%AVGO0.6% · +28%SOLS0.6% · +48%KDP0.6% · -1%VALE0.6% · -3%GNRC0.6% · -11%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q2 26 → Q3 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

3 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 30.3%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 12, 2026.

Assets Under Management
$168.7M
Discretionary
$165.6M
Employees
5
Accounts
213
Address
180 OLD TAPPAN RD BLDG #5 FL 1
OLD TAPPAN, NJ 07675-7052
Phone
(201) 768-0218
Website
Name Title / Status Ownership Type
PORRO, MICHAEL, JOHN ControlPRESIDENT/CHIEF COMPLIANCE OFFICER
since Sep 2002
75% or moreIndividual
SIMON, DAWN, MARIEOFFICE MANAGER
since Feb 2005
5–10%Individual
Ownership & leadership changes · 1 filing with changes since Apr 4, 2012

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Apr 22, 2024 filing
  • AddedSIMON, DAWN, MARIE · OFFICE MANAGER · 5–10%
Apr 4, 2012 filing (earliest on record)
  • ListedPORRO, MICHAEL, JOHN · PRESIDENT/CHIEF COMPLIANCE OFFICER · 75% or more · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Michael J. Porro & Co. Financial Advisors, Inc. Holdings (2026-09-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 COHERENT CORP COHR 19247G107 $11.0M 6.67% 38,385 SH
2 DELL TECHNOLOGIES INC DELL 24703L202 $8.1M 4.92% 15,145 SH
3 MARVELL TECHNOLOGY INC MRVL 573874104 $4.9M 2.96% 18,526 SH
4 BLOOM ENERGY CORP BE 093712107 $4.4M 2.67% 15,970 SH
5 INTEGER HLDGS CORP ITGR 45826H109 $3.8M 2.32% 30,409 SH
6 ASML HLDG NV ASML N07059210 $3.8M 2.31% 2,113 SH
7 TOWER SEMICONDUCTOR LTD TSEM M87915274 $3.7M 2.25% 16,395 SH
8 APPLE INC AAPL 037833100 $3.7M 2.22% 11,017 SH
9 SEMTECH CORP SMTC 816850101 $3.3M 2.00% 18,602 SH
10 INTEL CORP INTC 458140100 $3.3M 1.99% 27,456 SH
11 CORNING INC GLW 219350105 $3.2M 1.95% 20,942 SH
12 ARM HOLDINGS PLC ARM 042068205 $3.1M 1.89% 10,804 SH
13 ISHARES TR IWM 464287655 $2.9M 1.78% 10,597 SH
14 MICROSOFT CORP MSFT 594918104 $2.9M 1.72% 5,564 SH
15 QUALCOMM INC QCOM 747525103 $2.8M 1.69% 15,220 SH
16 NVIDIA CORPORATION NVDA 67066G104 $2.8M 1.68% 12,180 SH
17 ALPHABET INC GOOG 02079K107 $2.5M 1.48% 7,197 SH
18 VANECK ETF TRUST SMH 92189F676 $2.4M 1.45% 3,945 SH
19 ENPRO INC NPO 29355X107 $2.4M 1.42% 7,696 SH
20 EVERPURE INC P 74624M102 $2.3M 1.40% 17,773 SH
21 STMICROELECTRONICS N V STM 861012102 $2.3M 1.39% 43,088 SH
22 VERTEX PHARMACEUTICALS INC VRTX 92532F100 $2.3M 1.38% 4,364 SH
23 PALANTIR TECHNOLOGIES INC PLTR 69608A108 $2.2M 1.30% 11,517 SH
24 INVESCO QQQ TR QQQ 46090E103 $2.0M 1.18% 2,644 SH
25 STERLING INFRASTRUCTURE INC STRL 859241101 $1.9M 1.14% 3,850 SH
26 SHARKNINJA INC SN G8068L108 $1.8M 1.09% 10,057 SH
27 MERCK & CO INC MRK 58933Y105 $1.6M 0.96% 10,963 SH
28 TAIWAN SEMICONDUCTOR MANUFAC TSM 874039100 $1.6M 0.94% 3,407 SH
29 CROWDSTRIKE HLDGS INC CRWD 22788C105 $1.6M 0.94% 5,868 SH
30 XYLEM INC XYL 98419M100 $1.5M 0.91% 14,856 SH
31 HOWMET AEROSPACE INC HWM 443201108 $1.5M 0.90% 6,580 SH
32 GENERAL MTRS CO GM 37045V100 $1.5M 0.89% 19,186 SH
33 STATE STR SPDR S&P 500 ETF T SPY 78462F103 $1.4M 0.86% 1,871 SH
34 TTM TECHNOLOGIES INC TTMI 87305R109 $1.4M 0.86% 11,576 SH
35 ISHARES TR TLT 464287432 $1.4M 0.86% 18,270 SH
36 SENSATA TECHNOLOGIES HLDG PL ST G8060N102 $1.4M 0.84% 33,283 SH
37 BOEING CO BA 097023105 $1.3M 0.80% 7,078 SH
38 TESLA INC TSLA 88160R101 $1.3M 0.78% 3,630 SH
39 FIRST SOLAR INC FSLR 336433107 $1.3M 0.77% 7,307 SH
40 MOTOROLA SOLUTIONS INC MSI 620076307 $1.3M 0.77% 2,865 SH
41 WOODSIDE ENERGY GROUP LTD WDS 980228308 $1.2M 0.75% 56,221 SH
42 TUTOR PERINI CORP TPC 901109108 $1.2M 0.73% 14,643 SH
43 WATTS WATER TECHNOLOGIES INC WTS 942749102 $1.2M 0.72% 3,386 SH
44 ACCENTURE PLC IRELAND ACN G1151C101 $1.2M 0.70% 6,331 SH
45 INTERNATIONAL BUSINESS MACHS IBM 459200101 $1.2M 0.70% 5,255 SH
46 NXP SEMICONDUCTORS N V NXPI N6596X109 $1.1M 0.67% 4,698 SH
47 CVS HEALTH CORP CVS 126650100 $1.1M 0.67% 12,980 SH
48 STATE STR SPDR DOW JONES IND DIA 78467X109 $1.1M 0.66% 2,139 SH
49 ABBVIE INC ABBV 00287Y109 $1.1M 0.64% 4,049 SH
50 AMAZON COM INC AMZN 023135106 $1.0M 0.62% 4,136 SH
Filing History
Period Filed AUM Holdings Accession
2026-09-30 2026-10-16 $165.5M 134 0001754960-26-000888
2026-06-30 2026-10-16 $175.6M 139 0001754960-26-000886
2025-12-31 2026-10-08 $119.3M 130 0001754960-26-000818
Filer Information
Address
180 OLD TAPPAN RD
BLDG 5
OLD TAPPAN, NJ 07675
Phone
(201) 768-0218
Filing Manager
Michael J. Porro & Co. Financial Advisors, Inc.
OLD TAPPAN, NJ
Signatory
Aryn Sands
Agent