WILLIAM JOHN SEMPOLINSKI
Sector Allocation
- Technology44.5%$115.3M
- Other39.6%$102.4M
- Financials4.7%$12.1M
- Industrials2.7%$7.0M
- Consumer Discretionary2.7%$7.0M
- Healthcare2.2%$5.7M
- Materials1.0%$2.7M
- Energy1.0%$2.6M
- Real Estate0.8%$2.2M
- Consumer Staples0.6%$1.5M
AUM History
13fpro.ai/research/fund/william-john-sempolinski-2149024
Conviction and streaks
Concentrating · top 10 = 57.5%From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.
Largest positions — Q3 2026
NVDA
$56.4MAAPL
$25.8M- T$17.1M
- CAPITAL$10.0M
- ISHARES$9.6M
GOOGL
$7.6MAMZN
$6.5MMSFT
$6.2M- ISHARES$5.5M
- VANECK$4.4M
- ISHARES$4.1M
BAH
$4.1M- VANECK$3.9M
META
$3.9M- FIRST$3.6M
- ISHARES$3.6M
- SCHWAB$3.6M
- PROSHARES$3.2M
- ISHARES$3.2M
- AMERICAN$3.1M
Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.
13fpro.ai/research/fund/william-john-sempolinski-2149024
WILLIAM JOHN SEMPOLINSKI 13F holdings — Q3 2026
$258.9M portfolio (+4.5% QoQ) · 104 holdings · Q3 2026 13F · top 10 are 58% of the stock portfolio
$56.4M
21.8% of stocks
-2%This quarter-0.2%Since filed4+ qtrsHeld$25.8M
10.0% of stocks
+1%This quarter+1.3%Since filed4+ qtrsHeld- 3
T ROWE PRICE EXCHANGE-TRADED - ULTRA SHRT TRM
$17.1M
6.6% of stocks
+9%This quarter—Since filed—HeldAIQuality—Est. buy— - 4
CAPITAL GROUP DIVIDEND VALUE - SHS CREAT UNIT
$10.0M
3.9% of stocks
+7%This quarter—Since filed—HeldAIQuality—Est. buy— - 5
ISHARES TR - 0-3 MTH TREASURY
$9.6M
3.7% of stocks
+16%This quarter—Since filed—HeldAIQuality—Est. buy— $7.6M
2.9% of stocks
+2%This quarter-6.6%Since filed4+ qtrsHeld$6.5M
2.5% of stocks
-0.8%This quarter-5.2%Since filed4+ qtrsHeld$6.2M
2.4% of stocks
-9%This quarter+0.1%Since filed4+ qtrsHeld- 9
ISHARES TR - MSCI USA QLT FCT
$5.5M
2.1% of stocks
+2%This quarter—Since filed—HeldAIQuality—Est. buy— - 10
VANECK ETF TRUST - MRNGSTR WDE MOAT
$4.4M
1.7% of stocks
-0.7%This quarter—Since filed—HeldAIQuality—Est. buy—
| # | Company | Value | Weight | This quarter | Since filed | Held | AI quality | Est. buy | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | $56.4M | 21.8% | -2% | -0.2% | 4+ qtrsTrimmed 2 qtrs in a row | 86.0#3 | Estimated buy price is Pro: unlock with a free trial | ||
| 2 | $25.8M | 10.0% | +1% | +1.3% | 4+ qtrs | 75.7#88 | Estimated buy price is Pro: unlock with a free trial | ||
| 3 | T ROWE PRICE EXCHANGE-TRADED - ULTRA SHRT TRM | $17.1M | 6.6% | +9% | — | — | — | — | |
| 4 | CAPITAL GROUP DIVIDEND VALUE - SHS CREAT UNIT | $10.0M | 3.9% | +7% | — | — | — | — | |
| 5 | ISHARES TR - 0-3 MTH TREASURY | $9.6M | 3.7% | +16% | — | — | — | — | |
| 6 | $7.6M | 2.9% | +2% | -6.6% | 4+ qtrs | 77.7#60 | Estimated buy price is Pro: unlock with a free trial | ||
| 7 | $6.5M | 2.5% | -0.8% | -5.2% | 4+ qtrs | 67.5#361 | Estimated buy price is Pro: unlock with a free trial | ||
| 8 | $6.2M | 2.4% | -9% | +0.1% | 4+ qtrsTrimmed 3 qtrs in a row | 79.8#30 | Estimated buy price is Pro: unlock with a free trial | ||
| 9 | ISHARES TR - MSCI USA QLT FCT | $5.5M | 2.1% | +2% | — | — | — | — | |
| 10 | VANECK ETF TRUST - MRNGSTR WDE MOAT | $4.4M | 1.7% | -0.7% | — | — | — | — |
All holdings — WILLIAM JOHN SEMPOLINSKI (Q3 2026)
104 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.
| # | Company | Held | Source | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 11 | — | ISHARES TR - US AER DEF ETFetf/fund | — | $4.1M | 1.6% | 20K | -0.2% | — | — | 13F |
| 12 | Booz Allen Hamilton Holding Corp | Technology | $4.1M | 1.6% | 96K | +25% | 4+ qtrsAdded 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 13 | — | VANECK ETF TRUST - SEMICONDUCTR ETFetf/fund | — | $3.9M | 1.5% | 6,477 | -18% | — | — | 13F |
| 14 | Meta Platforms, Inc. | Technology | $3.9M | 1.5% | 5,415 | -2% | 4+ qtrsTrimmed 2 qtrs in a row | AI quality score is Pro: unlock with a free trial | 13F | |
| 15 | — | FIRST TR EXCHANGE-TRADED FD - NASDQ CLN EDGE | — | $3.6M | 1.4% | 20K | +4% | — | — | 13F |
| 16 | — | ISHARES TR - ISHARES SEMICDTRetf/fund | — | $3.6M | 1.4% | 6,296 | -20% | — | — | 13F |
| 17 | — | SCHWAB STRATEGIC TR - US DIVIDEND EQ | — | $3.6M | 1.4% | 110K | +914% | — | — | 13F |
| 18 | — | PROSHARES TR - S&P 500 DV ARISTetf/fund | — | $3.2M | 1.2% | 59K | -0.7% | — | — | 13F |
| 19 | — | ISHARES U S ETF TR - SHOR DURA BD ETFetf/fund | — | $3.2M | 1.2% | 64K | New | — | — | 13F |
| 20 | — | AMERICAN CENTY ETF TR - AVANTIS EMGMKTetf/fund | — | $3.1M | 1.2% | 33K | +7% | — | — | 13F |
| 21 | — | ISHARES TR - EXPND TEC SC ETFetf/fund | — | $2.9M | 1.1% | 17K | -9% | — | — | 13F |
| 22 | Jackson Financial Inc. | Financials | $2.8M | 1.1% | 22K | -0.5% | 4+ qtrs | AI quality score is Pro: unlock with a free trial | 13F | |
| 23 | — | FIRST TR EXCHANGE-TRADED FD - WTR ETFetf/fund | — | $2.8M | 1.1% | 27K | +0.8% | — | — | 13F |
| 24 | — | ISHARES TR - MSCI INTL VLU FTetf/fund | — | $2.5M | 1.0% | 58K | — | — | — | 13F |
| 25 | — | ISHARES TR - MSCI US GARP ETFetf/fund | — | $2.4M | 0.9% | 28K | +19% | — | — | 13F |
| 26 | $RKLB | Rocket Lab Corp | Industrials | $2.3M | 0.9% | 33K | +28% | |||
| 27 | — | ISHARES TR - MSCI EAFE ETF | — | $2.2M | 0.9% | 21K | +2% | |||
| 28 | $SHW | SHERWIN WILLIAMS CO | Materials | $2.2M | 0.8% | 6,833 | -4% | |||
| 29 | — | CAPITAL GROUP CORE BALANCED - SHS | — | $2.0M | 0.8% | 56K | +2% | |||
| 30 | $BRK.B | BERKSHIRE HATHAWAY INC | Financials | $1.9M | 0.7% | 3,810 | +9% | |||
| 31 | $GRAL | GRAIL, Inc. | Healthcare | $1.9M | 0.7% | 14K | +89% | |||
| 32 | — | ISHARES TR - ISHARES BIOTECH | — | $1.8M | 0.7% | 8,503 | +522% | |||
| 33 | $O | REALTY INCOME CORP | Real Estate | $1.7M | 0.7% | 31K | — | |||
| 34 | $SPCX | SPACE EXPLORATION TECHNOLOGIES CORP | Technology | $1.6M | 0.6% | 11K | +168% | |||
| 35 | — | ISHARES TR - CORE S&P SCP ETF | — | $1.6M | 0.6% | 12K | -0.5% | |||
| 36 | $GOOG | Alphabet Inc. | Technology | $1.6M | 0.6% | 4,584 | — | |||
| 37 | $TSM | TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD | Technology | $1.5M | 0.6% | 3,235 | -4% | |||
| 38 | $RTX | RTX Corp | Industrials | $1.4M | 0.5% | 7,590 | -3% | |||
| 39 | $V | VISA INC. | Financials | $1.4M | 0.5% | 3,800 | +6% | |||
| 40 | $CAT | CATERPILLAR INC | Industrials | $1.3M | 0.5% | 1,636 | -11% | |||
| 41 | — | ISHARES TR - RUSSELL 2000 ETF | — | $1.3M | 0.5% | 4,688 | +0.4% | |||
| 42 | $GLD | SPDR GOLD TRUST | Financials | $1.3M | 0.5% | 3,303 | +300% | |||
| 43 | $WMT | Walmart Inc. | Consumer Staples | $1.2M | 0.5% | 11K | +17% | |||
| 44 | — | ISHARES TR - CORE MSCI EAFE | — | $1.1M | 0.4% | 12K | +35% | |||
| 45 | $NGG | NATIONAL GRID PLC | Energy | $1.0M | 0.4% | 14K | -0.4% | |||
| 46 | $INDB | INDEPENDENT BANK CORP | Financials | $1.0M | 0.4% | 13K | -12% | |||
| 47 | $JNJ | JOHNSON & JOHNSON | Healthcare | $935K | 0.4% | 3,531 | +66% | |||
| 48 | $IBM | INTERNATIONAL BUSINESS MACHINES CORP | Technology | $935K | 0.4% | 4,250 | -12% | |||
| 49 | $ASML | ASML HOLDING NV | Technology | $906K | 0.3% | 500 | -30% | |||
| 50 | — | VANGUARD SPECIALIZED FUNDS - DIV APP ETF | — | $884K | 0.3% | 3,788 | — | |||
| 51 | $BAC | BANK OF AMERICA CORP /DE/ | Financials | $873K | 0.3% | 16K | +0.0% | |||
| 52 | $MU | MICRON TECHNOLOGY INC | Technology | $847K | 0.3% | 795 | -4% | |||
| 53 | $KMI | KINDER MORGAN, INC. | Energy | $844K | 0.3% | 28K | -2% | |||
| 54 | — | VANGUARD SCOTTSDALE FDS - SHRT TRM CORP BD | — | $829K | 0.3% | 11K | +29% | |||
| 55 | — | CAPITAL GRP FIXED INCM ETF T - MUN HIGH ETF | — | $780K | 0.3% | 32K | +92% | |||
| 56 | $CCL | Carnival Corp Ltd. | Industrials | $771K | 0.3% | 31K | +2% | |||
| 57 | $RVMD | Revolution Medicines, Inc. | Healthcare | $770K | 0.3% | 3,750 | +103% | |||
| 58 | $NBIS | Nebius Group N.V. | Technology | $755K | 0.3% | 3,199 | -22% | |||
| 59 | — | VANGUARD INDEX FDS - MRNGSTR TTL STK | — | $737K | 0.3% | 1,969 | — | |||
| 60 | $GH | Guardant Health, Inc. | Healthcare | $696K | 0.3% | 3,900 | +37% | |||
| 61 | $GE | GENERAL ELECTRIC CO | Industrials | $644K | 0.3% | 2,062 | +0.3% | |||
| 62 | $WT | WisdomTree, Inc. | Financials | $601K | 0.2% | 5,868 | New | |||
| 63 | $AMAT | APPLIED MATERIALS INC /DE | Technology | $597K | 0.2% | 1,168 | — | |||
| 64 | — | ISHARES TR - MSCI INTL MOMENT | — | $563K | 0.2% | 11K | -22% | |||
| 65 | $AVGO | Broadcom Inc. | Technology | $557K | 0.2% | 1,585 | -49% | |||
| 66 | $CFG | CITIZENS FINANCIAL GROUP INC/RI | Financials | $521K | 0.2% | 8,168 | -35% | |||
| 67 | — | ISHARES TR - CORE US AGGBD ET | — | $516K | 0.2% | 5,458 | -1% | |||
| 68 | — | ISHARES TR - 20 YR TR BD ETF | — | $503K | 0.2% | 6,465 | -75% | |||
| 69 | $LLY | ELI LILLY & Co | Healthcare | $472K | 0.2% | 408 | +14% | |||
| 70 | $STWD | STARWOOD PROPERTY TRUST, INC. | Real Estate | $461K | 0.2% | 34K | -9% | |||
| 71 | $LYG | Lloyds Banking Group plc | Financials | $421K | 0.2% | 75K | +2% | |||
| 72 | — | ISHARES TR - PFD AND INCM SEC | — | $414K | 0.2% | 14K | -40% | |||
| 73 | $ARM | ARM HOLDINGS PLC /UK | Technology | $396K | 0.1% | 1,367 | -24% | |||
| 74 | $STX | Seagate Technology Holdings plc | Technology | $392K | 0.1% | 425 | -37% | |||
| 75 | $XOM.R34088 | EXXON MOBIL CORP | Energy | $391K | 0.1% | 2,403 | +59% | |||
| 76 | $LRCX | LAM RESEARCH CORP | Technology | $388K | 0.1% | 1,180 | -20% | |||
| 77 | — | VANGUARD INDEX FDS - S&P 500 ETF SHS | — | $370K | 0.1% | 528 | +5% | |||
| 78 | $JPM | JPMORGAN CHASE & CO | Financials | $369K | 0.1% | 1,116 | — | |||
| 79 | — | SSGA ACTIVE ETF TR - ST STR TOTAL ETF | — | $356K | 0.1% | 9,526 | -77% | |||
| 80 | $IVZ | Invesco Ltd. | Financials | $354K | 0.1% | 1,704 | — | |||
| 81 | $TWST | Twist Bioscience Corp | Healthcare | $348K | 0.1% | 1,800 | New | |||
| 82 | $TXG | 10x Genomics, Inc. | Healthcare | $334K | 0.1% | 3,700 | New | |||
| 83 | $PFH | PRUDENTIAL FINANCIAL INC | Financials | $324K | 0.1% | 2,850 | -14% | |||
| 84 | $C | CITIGROUP INC | Financials | $324K | 0.1% | 2,500 | — | |||
| 85 | $COST | COSTCO WHOLESALE CORP /NEW | Consumer Staples | $319K | 0.1% | 350 | — | |||
| 86 | $HD | HOME DEPOT, INC. | Consumer Discretionary | $313K | 0.1% | 1,100 | +22% | |||
| 87 | $META | Meta Platforms, Inc. | Technology | $306K | 0.1% | 4,000 | — | |||
| 88 | — | PIMCO ETF TR - MULTISECTOR BD | — | $302K | 0.1% | 12K | -53% | |||
| 89 | $MPLX | MPLX LP | Energy | $299K | 0.1% | 5,301 | — | |||
| 90 | $DAL | DELTA AIR LINES, INC. | Industrials | $292K | 0.1% | 3,500 | — | |||
| 91 | — | VANGUARD SCOTTSDALE FDS - INT-TERM CORP | — | $290K | 0.1% | 3,700 | New | |||
| 92 | $AMD | ADVANCED MICRO DEVICES INC | Technology | $287K | 0.1% | 469 | New | |||
| 93 | $RIO | RIO TINTO PLC | Materials | $273K | 0.1% | 2,901 | — | |||
| 94 | $LMT | LOCKHEED MARTIN CORP | Industrials | $255K | 0.1% | 500 | -17% | |||
| 95 | — | MORGAN STANLEY ETF TRUST - EATO VA ULTR ETF | — | $253K | 0.1% | 5,000 | — | |||
| 96 | $UNH | UNITEDHEALTH GROUP INC | Healthcare | $239K | 0.1% | 650 | — | |||
| 97 | $PANW | Palo Alto Networks Inc | Technology | $238K | 0.1% | 600 | — | |||
| 98 | $DUK | Duke Energy CORP | Utilities | $230K | 0.1% | 2,020 | — | |||
| 99 | $TSLA | Tesla, Inc. | Consumer Discretionary | $220K | 0.1% | 620 | — | |||
| 100 | $GLW | CORNING INC /NY | Materials | $217K | 0.1% | 1,410 | -69% | |||
| 101 | $QQQ | INVESCO QQQ TRUST, SERIES 1 | — | $207K | 0.1% | 280 | — | |||
| 102 | $SO | SOUTHERN CO | Utilities | $206K | 0.1% | 2,488 | — | |||
| 103 | $QS | QuantumScape Corp | Technology | $51K | 0.0% | 11K | -95% | |||
| 104 | $LAES | SEALSQ Corp | Technology | $42K | 0.0% | 18K | -55% |
What changed in Q3 2026
Against the previous quarter's 13F: 6 new, 37 added to, 40 trimmed, 8 sold out. Share-count changes; largest moves by dollar size first.
New positions (6)
- ISHARES U S ETF TR - SHOR DURA BD ETF$3.2M
first bought this quarter
$WTWisdomTree, Inc.$601K
first bought this quarter
$TWSTTwist Bioscience Corp$348K
first bought this quarter
$TXG10x Genomics, Inc.$334K
first bought this quarter
- VANGUARD SCOTTSDALE FDS - INT-TERM CORP$290K
first bought this quarter
$AMDADVANCED MICRO DEVICES INC$287K
first bought this quarter
Added to (37)
- SCHWAB STRATEGIC TR - US DIVIDEND EQ+914%
now $3.6M
- ISHARES TR - ISHARES BIOTECH+522%
now $1.8M
- T ROWE PRICE EXCHANGE-TRADED - ULTRA SHRT TRM+9%
now $17.1M
- ISHARES TR - 0-3 MTH TREASURY+16%
now $9.6M
$SPCXSPACE EXPLORATION TECHNOLOGIES CORP+168%now $1.6M · held 2 qtrs, 2 adds in a row
$GLDSPDR GOLD TRUST+300%
now $1.3M · held 2 qtrs, 2 adds in a row
+31 more in the Excel export
Trimmed (40)
- ISHARES TR - 20 YR TR BD ETF-75%
now $503K
- SSGA ACTIVE ETF TR - ST STR TOTAL ETF-77%
now $356K
now $56.4M · held 4+ qtrs, 2 trims in a row
- ISHARES TR - ISHARES SEMICDTR-20%
now $3.6M
$QSQuantumScape Corp-95%
now $51K · held 4+ qtrs
- VANECK ETF TRUST - SEMICONDUCTR ETF-18%
now $3.9M
+34 more in the Excel export
Holdings by quarter
Every 13F WILLIAM JOHN SEMPOLINSKI has filed, 3 earlier quarters. Pick one to see what it held then.
Is it too late to follow WILLIAM JOHN SEMPOLINSKI?
Q3 2026 13F filed with the SEC on Oct 20, 2026. Prices are closing prices as of Oct 26, 2026.
Average quality of WILLIAM JOHN SEMPOLINSKI's top 20 holdings: 78/100 (our AI quality score, weighted by position size; 17 of the 20 are scored)
Top 10 since filing
-0.3%
Value-weighted move of the 10 largest stock positions
Turnover
7%
Last quarter
Top 10 weight
58%
Share of the stock portfolio in its 10 largest positions
Held 4+ quarters
93%
Share of portfolio value in positions held a year or more
Highest-quality names it owns(among its 100 largest positions)
The 8 highest-scoring companies in this portfolio are a Pro feature.
How these are measured
- Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
- Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
- Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q4 2025 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
- Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
- Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.
Portfolio Overview
WILLIAM JOHN SEMPOLINSKI disclosed 104 positions worth $258.9M in its Form 13F-HR for Q3 2026, led by $NVDA (NVIDIA CORP) at 21.8% of the equity portfolio, followed by $AAPL. During the quarter the fund opened 6 new positions and exited 8. The portfolio is most concentrated in Technology (44.5% of disclosed assets). All figures are sourced directly from WILLIAM JOHN SEMPOLINSKI’s Form 13F-HR filing with the SEC under CIK 2149024.
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