WILLIAM JOHN SEMPOLINSKI
Long book
$199.2M
Q1 2026
Positions
93
Top-10 weight
59%
concentration
Last quarter
-5.8%
SPY -4.4%
Turnover
16%
of book per quarter
Strategy in plain words
auto-generated from filingsWILLIAM JOHN SEMPOLINSKI is an institutional manager, running a $199.2M US long book across 93 positions.
The portfolio is concentrated: the top 10 names carry 59% of the portfolio. Turnover is modest: positions are typically held for years. Current anchor positions: NVIDIA CORP, APPLE INC, T ROWE PRICE ULTRA SHORT-TER, ISHARES 0-3 MONTH TREASURY B, MICROSOFT CORP.
Sector allocation
Technology 75%
Consumer discretionary 8%
Industrials 7%
Financials 6%
Utilities 1%
Services media 1%
Energy 1%
Healthcare 1%
Long book by quarter
What does WILLIAM JOHN own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| NVDA NVIDIA CORP | Technology | 254.5K | $44.4M | 22.3% | +0.3% |
| AAPL APPLE INC | Technology | 76.8K | $19.5M | 9.8% | +5.6% |
| MSFT MICROSOFT CORP | Technology | 17.0K | $6.3M | 3.2% | -3.8% |
| GOOGL ALPHABET INC-CL A | Technology | 21.4K | $6.2M | 3.1% | +4.9% |
| AMZN AMAZON.COM INC | Consumer discretionary | 26.1K | $5.4M | 2.7% | -0.2% |
| META META PLATFORMS INC-CLASS A | Technology | 5.8K | $3.3M | 1.7% | -1.4% |
| SHW SHERWIN-WILLIAMS CO/THE | Consumer discretionary | 7.2K | $2.3M | 1.2% | +1.3% |
| JXN JACKSON FINANCIAL INC-A | Financials | 21.2K | $2.2M | 1.1% | Held |
| IBM INTL BUSINESS MACHINES CORP | Technology | 7.8K | $1.9M | 1.0% | -18.7% |
| RKLB ROCKET LAB CORP | Industrials | 26.6K | $1.7M | 0.9% | -11.8% |
| RTX RTX CORP | Industrials | 7.4K | $1.4M | 0.7% | -1.1% |
| GOOG ALPHABET INC-CL C | Technology | 4.6K | $1.3M | 0.7% | +48.6% |
| CAT CATERPILLAR INC | Industrials | 1.8K | $1.3M | 0.7% | +12.3% |
| QS QUANTUMSCAPE CORP | Technology | 193.1K | $1.2M | 0.6% | +3.5% |
| BRK/B BERKSHIRE HATHAWAY INC-CL B | Financials | 2.5K | $1.2M | 0.6% | +201.2% |
| INDB INDEPENDENT BANK CORP/MA | Financials | 15.9K | $1.2M | 0.6% | -7.6% |
| WMT WALMART INC | Consumer discretionary | 9.6K | $1.2M | 0.6% | +6.1% |
| V VISA INC-CLASS A SHARES | Services media | 3.6K | $1.1M | 0.5% | +33.3% |
| KMI KINDER MORGAN INC | Utilities | 29.1K | $976K | 0.5% | -5.6% |
| ASML ASML HOLDING NV-NY REG SHS | Industrials | 710 | $938K | 0.5% | Held |
| AVGO BROADCOM INC | Technology | 3.0K | $924K | 0.5% | +97.7% |
| CCL CARNIVAL CORP LTD | Industrials | 32.9K | $851K | 0.4% | -11.1% |
| BAC BANK OF AMERICA CORP | Financials | 16.0K | $781K | 0.4% | +21.3% |
| CFG CITIZENS FINANCIAL GROUP | Financials | 12.5K | $751K | 0.4% | -28.5% |
| PLTR PALANTIR TECHNOLOGIES INC-A | Technology | 5.1K | $745K | 0.4% | -23.9% |
| GLW CORNING INC | Industrials | 4.5K | $613K | 0.3% | New |
| GE GENERAL ELECTRIC | Industrials | 2.1K | $583K | 0.3% | Held |
| ENB ENBRIDGE INC | Energy | 8.1K | $439K | 0.2% | Held |
| AMAT APPLIED MATERIALS INC | Technology | 1.2K | $399K | 0.2% | Held |
| PRU PRUDENTIAL FINANCIAL INC | Financials | 4.0K | $391K | 0.2% | -4.8% |
| NBIS NEBIUS GROUP NV | Technology | 3.8K | $389K | 0.2% | +11.9% |
| LMT LOCKHEED MARTIN CORP | Industrials | 603 | $364K | 0.2% | New |
| LLY ELI LILLY & CO | Healthcare | 388 | $357K | 0.2% | -11.4% |
| JNJ JOHNSON & JOHNSON | Healthcare | 1.4K | $350K | 0.2% | +7.5% |
| COST COSTCO WHOLESALE CORP | Consumer discretionary | 350 | $349K | 0.2% | +16.7% |
| JPM JPMORGAN CHASE & CO | Financials | 1.1K | $328K | 0.2% | Held |
| MPLX MPLX LP | Energy | 5.5K | $316K | 0.2% | +14.5% |
| HD HOME DEPOT INC | Consumer discretionary | 900 | $296K | 0.1% | +0.8% |
| C CITIGROUP INC | Financials | 2.5K | $284K | 0.1% | Held |
| DUK DUKE ENERGY CORP | Utilities | 2.0K | $264K | 0.1% | +13.5% |
| STXN SEAGATE TECHNOLOGY HOLDINGS | — | 675 | $264K | 0.1% | New |
| MU MICRON TECHNOLOGY INC | Technology | 760 | $257K | 0.1% | New |
| XOM EXXON MOBIL CORP | Energy | 1.5K | $256K | 0.1% | New |
| SO SOUTHERN CO/THE | Utilities | 2.5K | $240K | 0.1% | Held |
| DAL DELTA AIR LINES INC | Industrials | 3.5K | $233K | 0.1% | Held |
| GD GENERAL DYNAMICS CORP | Industrials | 662 | $227K | 0.1% | +10.3% |
| CRWV COREWEAVE INC-CL A | Technology | 2.9K | $221K | 0.1% | -9.5% |
| ORCL ORACLE CORP | Technology | 1.4K | $206K | 0.1% | New |
| ABAT AMERICAN BATTERY TECHNOLOGY | Materials | 24.2K | $68K | 0.0% | Held |
| ACHR ARCHER AVIATION INC-A | Industrials | 10.0K | $52K | 0.0% | Held |