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13D Management LLC — 13F Portfolio Report & Top Holdings (Q2 2026)
13D Management LLCCIK: 0001600133
ContrarianQuality / disciplined sizingSector-focused
Total reported value
$71.3M
Reporting period: 2026-06-30 · Number of holdings: 11
13D Management LLC disclosed 11 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $71.3M and a quarterly turnover rate of 48.9%.
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Personality snowflake
- Concentration
- 39.62
- Portfolio Stability
- 48.87
- Momentum
- 0
- Sector conviction
- 89.01
- Diversification
- 22
- Sizing Uniformity
- 96.86
13D Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.099 — mathematically equivalent to about 10 equally-sized positions, close to its 11 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.31), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward initiating meaningfully larger new positions than it adds to existing ones (a 7.9 percentage-point tilt) — a pattern consistent with a more contrarian, new-idea-driven approach.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govSold out ACHC
New buy SNPS
Sold out TRIP
Sold out WK
Add VSAT
-23.4% $3.8M
Add MRCY
0.0% $3.0M
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 | VSAT | Viasat Inc | Stock-Tech | 15.89% | +4.19% | -23.37% | |
| 2 | TWLO | Twilio Inc - A | Stock-Tech | 11.28% | -0.57% | -35.81% | |
| 3 | MRCY | Mercury Systems Inc | Stock-Industrials | 10.37% | +3.54% | — | |
| 4 | PSO | Pearson Plc-sponsored Adr | Stock-Other | 10.21% | +0.88% | — | |
| 5 | ALV | Autoliv Inc | Stock-Consumer Disc | 9.09% | -0.01% | — | |
| 6 | CRL | Charles River Laboratories | Stock-Healthcare | 8.20% | +1.30% | — | |
| 7 | SNPS | Synopsys Inc | Stock-Tech | 7.91% | +7.91% | NEW | |
| 8 | EXEL | Exelixis Inc | Stock-Healthcare | 7.73% | +0.99% | — | |
| 9 | ETSY | Etsy Inc | Stock-Consumer Disc | 7.59% | +2.02% | — | |
| 10 | ITGR | Integer Holdings CORP | Stock-Healthcare | 6.16% | -0.25% | — | |
| 11 | FUN | Six Flags Entertainment CORP | Stock-Other | 5.57% | +0.44% | — |
Portfolio Performance
Performance for Q3 2026
+9.7%
Performance Last 4 Quarters
+36.1%
- Stdev
- +19.7%
- Beta
- +1.17
- Alpha
- -4.6%
- Max Drawdown
- -14.6%
- Annualized Perf
- +18.3%
- Batting Avg vs S&P
- +38.9%
- Sortino
- +1.91
- Stutzer
- +0.28
- Treynor
- +0.16
- Sterling
- +0.98
- Calmar
- +1.25
- Information Ratio
- -0.1
- Tracking Error
- +12.8%
- Stdev Down
- +9.8%
- Winning Months %
- +58.3%
- Losing Months %
- +41.7%
- Best 12 Months
- +42.6%
- Worst 12 Months
- -4.9%
- Efficiency Ratio
- +0.39
- Sharpe
- +0.95
- Stdev Sectors
- +10.8%
- Skewness
- +0.26
- Kurtosis
- -0.82
- Upside Potential
- +3.82
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 11 | $71.3M | 49 | ||
| 2026 Q1 | 13 | $64.5M | 49 | ||
| 2025 Q4 | 16 | $84.0M | 63 | ||
| 2025 Q3 | 18 | $104.3M | 75 | ||
| 2025 Q2 | 20 | $109.6M | 0 | ||
| 2025 Q1 | 42 | $113.4M | 100 | ||
| 2024 Q4 | 42 | $135.0M | 0 | ||
| 2024 Q3 | 43 | $136.4M | 0 | ||
| 2024 Q2 | 42 | $137.1M | 0 | ||
| 2024 Q1 | 56 | $163.8M | 0 | ||
| 2023 Q4 | 58 | $169.9M | 0 | ||
| 2023 Q3 | 56 | $160.7M | 0 | ||
| 2023 Q2 | 56 | $183.3M | 0 | ||
| 2023 Q1 | 54 | $196.9M | 0 | ||
| 2022 Q4 | 56 | $190.1M | 0 | ||
| 2022 Q3 | 62 | $191.1M | 0 | ||
| 2022 Q2 | 60 | $226.1M | 0 | ||
| 2022 Q1 | 66 | $262.9M | 0 | ||
| 2021 Q4 | 58 | $260.8M | 0 | ||
| 2021 Q3 | 62 | $268.7M | 0 | ||
| 2021 Q2 | 62 | $290.7M | 96 | ||
| 2021 Q1 | 60 | $270.0M | 37 | ||
| 2020 Q4 | 62 | $241.9M | 26 | ||
| 2020 Q3 | 62 | $227.1M | 44 | ||
| 2020 Q2 | 60 | $229.9M | 28 | ||
| 2020 Q1 | 54 | $205.8M | 64 | ||
| 2019 Q4 | 54 | $329.4M | 66 | ||
| 2019 Q3 | 23 | $304.3M | 50 | ||
| 2019 Q2 | 27 | $331.8M | 35 | ||
| 2019 Q1 | 28 | $337.7M | 62 | ||
| 2018 Q4 | 30 | $309.3M | 49 | ||
| 2018 Q3 | 30 | $362.9M | 41 | ||
| 2018 Q2 | 36 | $392.1M | 32 | ||
| 2018 Q1 | 32 | $360.5M | 36 | ||
| 2017 Q4 | 34 | $335.5M | 49 | ||
| 2017 Q3 | 29 | $263.1M | 51 | ||
| 2017 Q2 | 35 | $282.3M | 23 | ||
| 2017 Q1 | 33 | $254.8M | 35 | ||
| 2016 Q4 | 32 | $244.0M | 37 | ||
| 2016 Q3 | 33 | $239.9M | 53 | ||
| 2016 Q2 | 30 | $243.2M | 29 | ||
| 2016 Q1 | 28 | $221.4M | 69 | ||
| 2015 Q4 | 34 | $328.0M | 85 | ||
| 2015 Q3 | 25 | $375.5M | 74 | ||
| 2015 Q2 | 33 | $444.1M | 41 | ||
| 2015 Q1 | 29 | $393.2M | 48 | ||
| 2014 Q4 | 32 | $362.2M | 50 | ||
| 2014 Q3 | 34 | $320.9M | 55 | ||
| 2014 Q2 | 36 | $274.3M | 52 | ||
| 2014 Q1 | 37 | $218.0M | 68 | ||
| 2013 Q4 | 38 | $134.8M | 0 |
Holding changes this quarter
13D Management LLC's most significant position changes for 2026-06-30: Sold out: Acadia Healthcare Co Inc (ACHC); New buy: Synopsys Inc (SNPS); Sold out: Tripadvisor Inc (TRIP); Sold out: Workiva Inc (WK); Trim: Viasat Inc (VSAT) — shares -23.37%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | SNPS | Synopsys Inc | +7.9% | NEW | New buy |
| 2 | VSAT | Viasat Inc | +4.2% | -23.37% | Trim |
| 3 | MRCY | Mercury Systems Inc | +3.5% | — | Unchanged |
| 4 | ETSY | Etsy Inc | +2% | — | Unchanged |
| 5 | CRL | Charles River Laboratories | +1.3% | — | Unchanged |
| 6 | EXEL | Exelixis Inc | +1% | — | Unchanged |
| 7 | PSO | Pearson Plc-sponsored Adr | +0.9% | — | Unchanged |
| 8 | FUN | Six Flags Entertainment CORP | +0.4% | — | Unchanged |
| 9 | ALV | Autoliv Inc | 0% | — | Unchanged |
| 10 | ITGR | Integer Holdings CORP | -0.3% | — | Unchanged |
| 11 | TWLO | Twilio Inc - A | -0.6% | -35.81% | Trim |
| 12 | WK | Workiva Inc | -4.8% | EXIT | Sold out |
| 13 | TRIP | Tripadvisor Inc | -5% | EXIT | Sold out |
| 14 | ACHC | Acadia Healthcare Co Inc | -10.7% | EXIT | Sold out |
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Filing History
FAQ
What is 13D Management LLC and what type of investor is it?
13D 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 (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $71.3M, spread across 11 disclosed positions.
What are 13D Management LLC's largest equity positions?
Based on the latest 13F filing, 13D Management LLC's top holdings by market value are:
1. Viasat Inc (VSAT) — $11.3M (15.9%)
2. Twilio Inc - A (TWLO) — $8.0M (11.3%)
3. Mercury Systems Inc (MRCY) — $7.4M (10.4%)
4. Pearson Plc-sponsored Adr (PSO) — $7.3M (10.2%)
5. Autoliv Inc (ALV) — $6.5M (9.1%)
What changes did 13D Management LLC make in its most recent portfolio filing?
In the latest reported quarter, 13D Management LLC made 6 notable position adjustments: 1 new positions were initiated, 0 existing holdings were added to, 2 positions were partially reduced, and 3 were completely exited. The largest of these moves: Sold out: Acadia Healthcare Co Inc (ACHC); New buy: Synopsys Inc (SNPS); Sold out: Tripadvisor Inc (TRIP); Sold out: Workiva Inc (WK); Trim: Viasat Inc (VSAT) — shares -23.37%
What sectors does 13D Management LLC focus on?
13D Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 41.7%
• Health Care: 26.2%
• Consumer Discretionary: 19.8%
• Industrials: 12.3%
Investment Profile
13D Management LLC returned an annualized 18.3% over the trailing 36 months — underperforming the S&P 500 by 4.6 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 1.17 (more volatile than the market) and a 39% quarterly batting average against the index.
Its portfolio is moderately concentrated and moderately active, with 41.7% of the portfolio concentrated in Information Technology.
Its turnover score has risen from 0 to 49 over the past 4 quarters — a shift toward more active trading.
It has added to its VSAT position for two straight quarters, increasing it by $4.4M to reach $11.3M.
Peer Institutions
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Developer Access
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