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PROFESSIONAL ADVISORY SERVICES INC — 13F Holdings & Portfolio

CIK 894205 · latest 13F-HR filed 2026-10-08

Backtest portfolio

PROFESSIONAL ADVISORY SERVICES INC manages $836.9M in 13F-reported U.S. long-equity assets across 90 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are MSFT (4.90%), GOOG (4.82%), TMO (4.08%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 3 new positions and exited 6; 20 existing positions rose in reported value and 32 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
$836.9M

Long-equity book

Holdings
90

Distinct positions

Period
2026-09-30

Filed 2026-10-08

Q/Q Activity
+3 / −6 / ↑20 / ↓32

vs 2026-06-30

Portfolio charts

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

Portfolio map

Q3 26
MSFT4.9% · -14%GOOG4.8% · +4%TMO4.1% · -22%AMZN4.0% · -6%BRK.B3.8% · -2%AZN3.5% · +13%AAPL3.5% · -12%IJH3.3% · +0%APH3.3% · +81%SYK3.3% · +19%AJG3.2% · +9%ELV3.2% · -0%BKNG3.1% · +12%J3.1% · -9%AMD3.1% · -16%ADI3.1% · +19%V2.8% · -6%T2.8% · -5%PEP2.8% · -6%XLE2.8% · newSYY2.7% · -3%SPGI2.7% · +3%USB2.7% · -4%GD2.6% · -2%TJX2.6% · +16%EMXC2.4% · -26%CARR2.4% · +23%NFLX2.1% · newADBE1.8% · -6%LRCX1.1% · -6%ASML1.0% · +1%AMAT0.8% · +4%VCSH0.8% · +4%JNJ0.6% · 0%VTI0.5% · 0%GOOGL0.5% · -0%NVDA0.3% · +1%VOO0.3% · +1%SHV0.2% · +45%RSP0.2% · +4%PG0.2% · 0%SPY0.2% · -1%ABBV0.1% · 0%MRK0.1% · +0%ROK0.1% · 0%IVV0.1% · -5%CVX0.1% · 0%CSCO0.1% · +0%ORCL0.1% · -0%BRK.A0.1% · 0%HD0.1% · 0%AVGO0.1% · +0%BA0.1% · 0%AXP0.1% · 0%PFE0.1% · +0%IBM0.1% · 0%MPC0.1% · 0%IWF0.1% · 0%IAU0.1% · -2%INTC0.1% · +0%

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

4 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 = 38.5%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 27, 2026.

Assets Under Management
$1.26B
Discretionary
$1.26B
Employees
13
Accounts
1,234
Address
2770 INDIAN RIVER BLVD
SUITE 204
VERO BEACH, FL 32960
Phone
(772) 778-0552
Website
Name Title / Status Ownership Type
BIEBER, CAROL, LIGON ControlVICE PRESIDENT/SECRETARY/TREASURER, CLASS A SHAREHOLDER, PARTNER
since Jan 2004
50–75%Individual
CONNETT, CHRISTOPHER, J ControlCHIEF COMPLIANCE OFFICER
since Jan 2026
Less than 5%Individual
JAFFE, DAVID, ALAN ControlPRESIDENT, CLASS A SHAREHOLDER, PARTNER
since Jan 2004
50–75%Individual
Ownership & leadership changes · 3 filings with changes since Mar 30, 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.

Mar 27, 2026 filing
  • AddedCONNETT, CHRISTOPHER, J · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
  • ChangedBIEBER, CAROL, LIGON · title VICE PRESIDENT/SECRETARY/TREASURER/CHIEF COMPLIANCE OFFICER, CLASS A SHAREHOLDER, PARTNER → VICE PRESIDENT/SECRETARY/TREASURER, CLASS A SHAREHOLDER, PARTNER
Mar 29, 2024 filing
  • No longer listedLIGON, KEN, MCGARVEY · VICE PRESIDENT, CLASS A SHAREHOLDER, PARTNER · 25–50% · control person · listed since Dec 1993
  • ChangedBIEBER, CAROL, LIGON · ownership 25–50% → 50–75%
Jun 29, 2020 filing
  • ChangedBIEBER, CAROL, LIGON · title SECRETARY/TREASURER/CHIEF COMPLIANCE OFFICER, CLASS A SHAREHOLDER, PARTNER → VICE PRESIDENT/SECRETARY/TREASURER/CHIEF COMPLIANCE OFFICER, CLASS A SHAREHOLDER, PARTNER
Mar 30, 2012 filing (earliest on record)
  • ListedBIEBER, CAROL, LIGON · SECRETARY/TREASURER/CHIEF COMPLIANCE OFFICER, CLASS A SHAREHOLDER, PARTNER · 25–50% · control person
  • ListedJAFFE, DAVID, ALAN · PRESIDENT, CLASS A SHAREHOLDER, PARTNER · 50–75% · control person
  • ListedLIGON, KEN, MCGARVEY · VICE PRESIDENT, CLASS A SHAREHOLDER, PARTNER · 25–50% · 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.

Top Adds (vs prior quarter)

Show all 20 →

Top Trims

Show all 32 →

New Positions

Show all 3 →

Exited Positions

Show all 6 →

PROFESSIONAL ADVISORY SERVICES 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 MICROSOFT MSFT 594918104 $41.0M 4.90% 79,907 SH
2 ALPHABET, INC. CLASS C GOOG 02079K107 $40.3M 4.82% 118,368 SH
3 THERMO FISHER SCIENTIFIC TMO 883556102 $34.2M 4.08% 50,612 SH
4 AMAZON AMZN 023135106 $33.9M 4.05% 135,930 SH
5 BERKSHIRE HATHAWAY INC-B BRK.B 084670702 $31.5M 3.76% 63,230 SH
6 ASTRAZENECA PLC AZN G0593M107 $29.7M 3.55% 181,963 SH
7 APPLE AAPL 037833100 $29.2M 3.49% 87,620 SH
8 ISHARES TR S&P MID ETF IJH 464287507 $28.0M 3.35% 389,558 SH
9 AMPHENOL CORP APH 032095101 $27.6M 3.30% 327,395 SH
10 STRYKER SYK 863667101 $27.3M 3.26% 98,993 SH
11 ARTHUR J. GALLAGHER AJG 363576109 $27.0M 3.22% 118,284 SH
12 ELEVANCE HEALTH INC ELV 036752103 $26.6M 3.18% 68,530 SH
13 BOOKING HOLDINGS BKNG 09857L108 $26.3M 3.14% 161,271 SH
14 JACOBS SOLUTIONS INC J 46982L108 $26.3M 3.14% 194,156 SH
15 ADVANCED MICRO DEVICES AMD 007903107 $26.3M 3.14% 42,916 SH
16 ANALOG DEVICES ADI 032654105 $26.1M 3.12% 65,864 SH
17 VISA INC V 92826C839 $23.8M 2.85% 66,272 SH
18 AT&T T 00206R102 $23.3M 2.78% 954,616 SH
19 PEPSICO PEP 713448108 $23.1M 2.76% 182,030 SH
20 SELECT SECTOR SPDR TR EGY XLE 81369Y506 $23.0M 2.75% 374,358 SH
21 SYSCO CORP SYY 871829107 $22.6M 2.70% 289,876 SH
22 S&P GLOBAL, INC. SPGI 78409V104 $22.6M 2.70% 57,215 SH
23 US BANCORP USB 902973304 $22.3M 2.66% 385,835 SH
24 GENERAL DYNAMICS COPR GD 369550108 $21.9M 2.62% 66,048 SH
25 TJX COMPANIES TJX 872540109 $21.9M 2.62% 165,436 SH
26 ISHARES MSCI EM EX CHINA EMXC 46434G764 $20.3M 2.43% 205,255 SH
27 CARRIER GLOBAL CORP CARR 14448C104 $20.3M 2.43% 370,360 SH
28 NETFLIX INC COM NFLX 64110L106 $17.5M 2.10% 251,989 SH
29 ADOBE SYS INC COM ADBE 00724F101 $14.8M 1.77% 61,696 SH
30 LAM RESEARCH CORP LRCX 512807306 $9.6M 1.15% 29,275 SH
31 ASML HOLDINGS ASML N07059210 $8.0M 0.95% 4,404 SH
32 APPLIED MATERIALS AMAT 038222105 $7.0M 0.84% 13,786 SH
33 VANGUARD SH TERM BD ETF VCSH 92206C409 $6.3M 0.75% 81,230 SH
34 JOHNSON & JOHNSON JNJ 478160104 $4.8M 0.58% 18,222 SH
35 VANGUARD TOTAL STK MKT VTI 922908769 $4.2M 0.50% 11,260 SH
36 ALPHABET, INC. CLASS A GOOGL 02079K305 $3.8M 0.45% 11,010 SH
37 NVIDIA CORP NVDA 67066G104 $2.3M 0.27% 10,032 SH
38 VANGUARD S&P 500 ETF VOO 922908363 $2.3M 0.27% 3,255 SH
39 ISHARES ST TREASURY ETF SHV 464288679 $2.0M 0.24% 18,377 SH
40 INVESCO S&P 500 EW ETF RSP 46137V357 $2.0M 0.24% 9,581 SH
41 PROCTER & GAMBLE PG 742718109 $1.7M 0.20% 11,543 SH
42 SPDR S&P500 ETF TRUST SPY 78462F103 $1.3M 0.16% 1,718 SH
43 ABBVIE INC. ABBV 00287Y109 $1.2M 0.14% 4,502 SH
44 MERCK & CO. MRK 58933Y105 $1.2M 0.14% 7,998 SH
45 ROCKWELL AUTOMATION INC. ROK 773903109 $1.0M 0.12% 2,350 SH
46 ISHARES TR CORE S&P 500 IVV 464287200 $835.0K 0.10% 1,090 SH
47 CHEVRON-TEXACO CORP CVX 166764100 $817.0K 0.10% 4,000 SH
48 CISCO SYSTEMS CSCO 17275R102 $815.0K 0.10% 7,568 SH
49 ORACLE CORPORATION ORCL 68389X105 $796.0K 0.10% 5,800 SH
50 BERKSHIRE A (1SH /100) BRK.A 084670108 $747.0K 0.09% 100 SH
Filing History
Period Filed AUM Holdings Accession
2026-09-30 2026-10-08 $836.9M 90 0000894205-26-000012
2026-06-30 2026-07-08 $835.7M 93 0000894205-26-000007
2026-03-31 2026-04-15 $724.4M 80 0000894205-26-000005
2025-12-31 2026-01-12 $771.6M 80 0000894205-26-000002
Filer Information
Address
2770 INDIAN RIVER BLVD SUITE 204
VERO BEACH, FL 32960
Phone
(772) 778-0552
Filing Manager
PROFESSIONAL ADVISORY SERVICES INC
VERO BEACH, FL
Signatory
Christopher Connett
Compliance Officer