GC
Gunderson Capital Management LLC SEC 13F Holdings (Q3 2026) — Top Position: Seagate Technology Holdings plc
Gunderson Capital Management LLCCIK: 0001792397
Diversified strategyHigh-turnover traderSector-focused
Total reported value
$358.8M
Reporting period: 2026-09-30 · Number of holdings: 54
Gunderson Capital Management LLC disclosed 54 holdings in its latest 13F filing for the period ending 2026-09-30, with total reported value of $358.8M and a quarterly turnover rate of 90.1%.
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Personality snowflake
- Concentration
- 14.08
- Portfolio Stability
- 90.14
- Momentum
- 100
- Sector conviction
- 100
- Diversification
- 100
- Sizing Uniformity
- 90.42
Gunderson Capital Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.035 — mathematically equivalent to about 28 equally-sized positions, well below its 54 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.96), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govSold out AMAT
New buy HPE
Sold out EWY
Add GOOGL
+3799.1% $15.3M
Sold out KLAC
New buy PLTR
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | STX | Seagate Technology Holdings plc | Stock-Tech | 5.39% | +2.13% | +67.53% | |
| 2 | NVDA | Nvidia CORP | Stock-Tech | 5.34% | +1.58% | +20.40% | |
| 3 | SNDK | Sandisk CORP | Stock-Tech | 5.09% | +2.70% | +170.48% | |
| 4 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 4.53% | -0.13% | -1.54% | |
| 5 | GE | General Electric | Stock-Industrials | 4.46% | +1.81% | +95.11% | |
| 6 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 4.39% | +4.28% | +3799.15% | |
| 7 | MU | Micron Technology Inc | Stock-Tech | 4.37% | -1.24% | -18.17% | |
| 8 | HPE | Hewlett Packard Enterprise | Stock-Tech | 4.29% | +4.29% | NEW | |
| 9 | DELL | Dell Technologies -c | Stock-Tech | 4.07% | -1.69% | -44.99% | |
| 10 | AVGO | Broadcom Inc | Stock-Tech | 3.98% | +1.62% | +75.67% | |
| 11 | ANET | Arista Networks Inc | Stock-Tech | 3.95% | +1.19% | +15.77% | |
| 12 | AMD | Advanced Micro Devices | Stock-Tech | 3.92% | -2.92% | -47.31% | |
| 13 | ASML | ASML Holding N.V. | Stock-Tech | 3.64% | -0.28% | -0.97% | |
| 14 | LLY | Eli Lilly & Co | Stock-Healthcare | 3.35% | +0.17% | +5.64% | |
| 15 | PLTR | Palantir Technologies Inc-a | Stock-Tech | 3.27% | +3.27% | NEW | |
| 16 | META | Meta Platforms Inc-class A | Stock-Comm Services | 3.09% | +3.09% | NEW | |
| 17 | LNG | Cheniere Energy Inc | Stock-Energy | 3.08% | +1.37% | +55.41% | |
| 18 | GEV | GE Vernova Inc | Stock-Industrials | 2.75% | -0.55% | -0.26% | |
| 19 | ASX | Ase Technology Holding -adr | Stock-Tech | 2.59% | +2.59% | NEW | |
| 20 | TWLO | Twilio Inc - A | Stock-Tech | 2.49% | +2.49% | NEW | |
| 21 | LRCX | Lam Research CORP | Stock-Tech | 2.49% | +2.49% | NEW | |
| 22 | MRVL | Marvell Technology Inc | Stock-Tech | 2.13% | -2.62% | -51.01% | |
| 23 | CLS | Celestica Inc | Stock-Tech | 1.98% | +0.69% | +49.60% | |
| 24 | TSEM | Tower Semiconductor Ltd. | Stock-Tech | 1.65% | -0.20% | -0.80% | |
| 25 | ARGX | Argenx Se - Adr | Stock-Healthcare | 1.62% | +1.62% | NEW | |
| 26 | COHR | Coherent CORP | Stock-Tech | 1.51% | +1.51% | NEW | |
| 27 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 1.46% | +1.13% | +306.57% | |
| 28 | WDC | Western Digital CORP | Stock-Tech | 1.45% | +1.45% | NEW | |
| 29 | TRGP | Targa Resources CORP | Stock-Energy | 1.42% | +0.03% | -1.23% | |
| 30 | SLB | Slb LTD | Stock-Energy | 1.25% | +1.25% | NEW | |
| 31 | AGX | Argan Inc | Stock-Industrials | 1.13% | -0.89% | +14.42% | |
| 32 | AAPL | Apple Inc | Stock-Tech | 1.00% | +0.27% | +14.92% | |
| 33 | VG | Venture Global Inc-cl A | Stock-Energy | 0.62% | +0.08% | -0.58% | |
| 34 | GLD | Spdr Gold Shares | ETF-Commodities | 0.35% | +0.35% | NEW | |
| 35 | CAT | Caterpillar Inc | Stock-Industrials | 0.26% | +0.26% | NEW | |
| 36 | WMT | Walmart Inc | Stock-Consumer Staples | 0.23% | +0.23% | NEW | |
| 37 | VOO | Vanguard S&p 500 ETF | ETF-Large Cap & Growth | 0.13% | +0.13% | NEW | |
| 38 | VUG | Vanguard Growth ETF | ETF-Other | 0.13% | +0.13% | NEW | |
| 39 | IVV | Ishares Core S&p 500 ETF | ETF-Large Cap & Growth | 0.11% | +0.11% | NEW | |
| 40 | MSFT | Microsoft CORP | Stock-Tech | 0.10% | +0.10% | NEW | |
| 41 | SITM | Sitime CORP | Stock-Tech | 0.09% | +0.09% | NEW | |
| 42 | DDOG | Datadog Inc - Class A | Stock-Tech | 0.09% | +0.09% | NEW | |
| 43 | ETN | Eaton Corporation plc | Stock-Industrials | 0.09% | +0.01% | — | |
| 44 | XLK | Ss Technology Select Sector | ETF-Tech | 0.09% | -0.01% | -13.83% | |
| 45 | SO | Southern Co/the | Stock-Utilities | 0.08% | -0.01% | +0.85% | |
| 46 | RF | Regions Financial CORP | Stock-Financials | 0.07% | +0.07% | NEW | |
| 47 | ALAB | Astera Labs Inc | Stock-Tech | 0.07% | +0.07% | NEW | |
| 48 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 0.07% | -0.08% | -55.29% | |
| 49 | AAOI | Applied Optoelectronics Inc | Stock-Tech | 0.06% | +0.06% | NEW | |
| 50 | VICR | Vicor CORP | Stock-Tech | 0.06% | +0.06% | NEW |
1–50 of 54
Portfolio Performance
Performance for Q4 2026
+5.3%
Performance Last 4 Quarters
+13.2%
- Stdev
- +23.7%
- Beta
- +1.43
- Alpha
- -3.8%
- Max Drawdown
- -16.4%
- Annualized Perf
- +29%
- Batting Avg vs S&P
- +61.1%
- Sortino
- +2.04
- Stutzer
- +0.34
- Treynor
- +0.2
- Sterling
- +1.4
- Calmar
- +1.77
- Information Ratio
- +0.35
- Tracking Error
- +16.9%
- Stdev Down
- +14%
- Winning Months %
- +72.2%
- Losing Months %
- +27.8%
- Best 12 Months
- +51.4%
- Worst 12 Months
- -7.4%
- Efficiency Ratio
- +0.54
- Sharpe
- +1.2
- Stdev Sectors
- +21.2%
- Skewness
- -0.5
- Kurtosis
- +0.39
- Upside Potential
- +3.53
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q3 | 54 | $358.8M | 90 | ||
| 2026 Q2 | 52 | $370.3M | 76 | ||
| 2026 Q1 | 46 | $239.2M | 100 | ||
| 2025 Q4 | 40 | $221.9M | 100 | ||
| 2025 Q3 | 53 | $271.4M | 84 | ||
| 2025 Q2 | 47 | $239.2M | 0 | ||
| 2025 Q1 | 29 | $155.4M | 100 | ||
| 2024 Q4 | 37 | $203.4M | 0 | ||
| 2024 Q3 | 40 | $236.1M | 0 | ||
| 2024 Q2 | 39 | $233.0M | 0 | ||
| 2024 Q1 | 41 | $215.3M | 0 | ||
| 2023 Q4 | 47 | $175.0M | 0 | ||
| 2023 Q3 | 49 | $147.0M | 0 | ||
| 2023 Q2 | 42 | $151.3M | 0 | ||
| 2023 Q1 | 43 | $134.6M | 0 | ||
| 2022 Q4 | 26 | $54.8M | 0 | ||
| 2022 Q3 | 20 | $71.0M | 0 | ||
| 2022 Q2 | 41 | $117.3M | 0 | ||
| 2021 Q1 | 43 | $136.1M | 100 | ||
| 2020 Q4 | 47 | $152.9M | 70 | ||
| 2020 Q3 | 44 | $115.5M | 68 | ||
| 2020 Q2 | 51 | $124.3M | 82 | ||
| 2020 Q1 | 33 | $72.2M | 100 | ||
| 2019 Q4 | 45 | $91.5M | 48 | ||
| 2019 Q3 | 55 | $101.0M | 52 | ||
| 2019 Q2 | 57 | $114.0M | 44 | ||
| 2019 Q1 | 61 | $115.2M | 100 | ||
| 2018 Q4 | 12 | $23.0M | 0 |
Holding changes this quarter
Gunderson Capital Management LLC's most significant position changes for 2026-09-30: Sold out: Applied Materials Inc (AMAT); Sold out: Ishares Msci South Korea ETF (EWY); New buy: Hewlett Packard Enterprise (HPE); Sold out: Kla CORP (KLAC); New buy: Palantir Technologies Inc-a (PLTR).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | HPE | Hewlett Packard Enterprise | +4.3% | NEW | New buy |
| 2 | GOOGL | Alphabet Inc-cl A | +4.3% | +3799.15% | Add |
| 3 | PLTR | Palantir Technologies Inc-a | +3.3% | NEW | New buy |
| 4 | META | Meta Platforms Inc-class A | +3.1% | NEW | New buy |
| 5 | SNDK | Sandisk CORP | +2.7% | +170.48% | Add |
| 6 | ASX | Ase Technology Holding -adr | +2.6% | NEW | New buy |
| 7 | TWLO | Twilio Inc - A | +2.5% | NEW | New buy |
| 8 | LRCX | Lam Research CORP | +2.5% | NEW | New buy |
| 9 | STX | Seagate Technology Holdings plc | +2.1% | +67.53% | Add |
| 10 | GE | General Electric | +1.8% | +95.11% | Add |
| 11 | ARGX | Argenx Se - Adr | +1.6% | NEW | New buy |
| 12 | AVGO | Broadcom Inc | +1.6% | +75.67% | Add |
| 13 | NVDA | Nvidia CORP | +1.6% | +20.40% | Add |
| 14 | COHR | Coherent CORP | +1.5% | NEW | New buy |
| 15 | WDC | Western Digital CORP | +1.5% | NEW | New buy |
| 16 | LNG | Cheniere Energy Inc | +1.4% | +55.41% | Add |
| 17 | SLB | Slb LTD | +1.3% | NEW | New buy |
| 18 | ANET | Arista Networks Inc | +1.2% | +15.77% | Add |
| 19 | AMZN | Amazon.com Inc | +1.1% | +306.57% | Add |
| 20 | CLS | Celestica Inc | +0.7% | +49.60% | Add |
| 21 | GLD | Spdr Gold Shares | +0.4% | NEW | New buy |
| 22 | AAPL | Apple Inc | +0.3% | +14.92% | Add |
| 23 | CAT | Caterpillar Inc | +0.3% | NEW | New buy |
| 24 | WMT | Walmart Inc | +0.2% | NEW | New buy |
| 25 | LLY | Eli Lilly & Co | +0.2% | +5.64% | Add |
| 26 | VOO | Vanguard S&p 500 ETF | +0.1% | NEW | New buy |
| 27 | VUG | Vanguard Growth ETF | +0.1% | NEW | New buy |
| 28 | IVV | Ishares Core S&p 500 ETF | +0.1% | NEW | New buy |
| 29 | MSFT | Microsoft CORP | +0.1% | NEW | New buy |
| 30 | SITM | Sitime CORP | +0.1% | NEW | New buy |
| 31 | DDOG | Datadog Inc - Class A | +0.1% | NEW | New buy |
| 32 | VG | Venture Global Inc-cl A | +0.1% | -0.58% | Trim |
| 33 | RF | Regions Financial CORP | +0.1% | NEW | New buy |
| 34 | ALAB | Astera Labs Inc | +0.1% | NEW | New buy |
| 35 | AAOI | Applied Optoelectronics Inc | +0.1% | NEW | New buy |
| 36 | VICR | Vicor CORP | +0.1% | NEW | New buy |
| 37 | ZETA | Zeta Global Holdings Corp-a | +0.1% | NEW | New buy |
| 38 | AVT | Avnet Inc | +0.1% | NEW | New buy |
| 39 | USAR | USA Rare Earth Inc | 0% | NEW | New buy |
| 40 | TRGP | Targa Resources CORP | 0% | -1.23% | Trim |
| 41 | ETN | Eaton Corporation plc | 0% | — | Unchanged |
| 42 | ✓ | — | — | Unchanged | |
| 43 | SO | Southern Co/the | 0% | +0.85% | Add |
| 44 | XLK | Ss Technology Select Sector | 0% | -13.83% | Trim |
| 45 | TTI | Tetra Technologies Inc | 0% | EXIT | Sold out |
| 46 | EFXT | Enerflex LTD | -0.1% | EXIT | Sold out |
| 47 | JPM | Jpmorgan Chase & Co | -0.1% | EXIT | Sold out |
| 48 | VTI | Vanguard Total Stock Mkt ETF | -0.1% | EXIT | Sold out |
| 49 | CRDO | Credo Technology Group Holding Ltd | -0.1% | EXIT | Sold out |
| 50 | COST | Costco Wholesale CORP | -0.1% | -55.29% | Trim |
1–50 of 78
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Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Filing History
FAQ
What is Gunderson Capital Management LLC and what type of investor is it?
Gunderson Capital Management LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-09-30), the firm manages a tracked equity portfolio valued at approximately $358.8M, spread across 54 disclosed positions.
What are Gunderson Capital Management LLC's largest equity positions?
Based on the latest 13F filing, Gunderson Capital Management LLC's top holdings by market value are:
1. Seagate Technology Holdings plc (STX) — $19.3M (5.4%)
2. Nvidia CORP (NVDA) — $19.2M (5.3%)
3. Sandisk CORP (SNDK) — $18.3M (5.1%)
4. Taiwan Semiconductor-sp Adr (TSM) — $16.2M (4.5%)
5. General Electric (GE) — $16.0M (4.5%)
What changes did Gunderson Capital Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Gunderson Capital Management LLC made 76 notable position adjustments: 26 new positions were initiated, 14 existing holdings were added to, 12 positions were partially reduced, and 24 were completely exited. The largest of these moves: Sold out: Applied Materials Inc (AMAT); Sold out: Ishares Msci South Korea ETF (EWY); New buy: Hewlett Packard Enterprise (HPE); Sold out: Kla CORP (KLAC); New buy: Palantir Technologies Inc-a (PLTR)
What sectors does Gunderson Capital Management LLC focus on?
Gunderson Capital Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 70.3%
• Industrials: 8.8%
• Communication Services: 7.5%
• Energy: 6.4%
• Health Care: 5.0%
• Consumer Discretionary: 1.5%
Investment Profile
Gunderson Capital Management LLC returned an annualized 29.0% over the trailing 36 months — underperforming the S&P 500 by 3.8 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.43 (more volatile than the market) and a 61% quarterly batting average against the index.
Its portfolio is broadly diversified and fast-trading, with 70.3% of the portfolio concentrated in Information Technology.
It has added to its STX position over the past two quarters (+$15.2M, now $19.3M), while trimming COST over the same stretch (-$317.7K, still holding $242.6K).
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