CIK: 0001536336
Total reported value
$208.0M
Reporting period: 2026-03-31 · Number of holdings: 10
Ma Investment Partnership, LP disclosed 10 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $208.0M and a quarterly turnover rate of 85.3%.
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Ma Investment Partnership, LP's disclosed holdings carry a Herfindahl concentration index of 0.165 — mathematically equivalent to about 6 equally-sized positions, close to its 10 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 0.85), 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 8.5 percentage-point tilt) — a pattern consistent with a more contrarian, new-idea-driven approach.
Sector classification currently covers about 51% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Trim AMD
-33.3% -$11.8M
Trim BABA
-33.3% -$9.4M
Add SNDK
0.0% $39.8M
Add VIAV
+150.0% $13.1M
Trim LMND
0.0% -$850.0K
Trim VRT
0.0% $8.9M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | SNDK | Sandisk CORP | Stock-Tech | 30.55% | +9.83% | — | |
| 2 | NVDA | Nvidia CORP | Stock-Tech | 16.77% | +16.77% | NEW | |
| 3 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 12.05% | -2.09% | — | |
| 4 | AMD | Advanced Micro Devices | Stock-Tech | 9.78% | -18.26% | -33.33% | |
| 5 | VIAV | Viavi Solutions INC | Stock-Tech | 8.00% | +4.89% | +150.00% | |
| 6 | BE | Bloom Energy Corp- A | Stock-Industrials | 6.51% | -1.07% | — | |
| 7 | RDDT | Reddit Inc-cl A | Stock-Comm Services | 6.47% | +6.47% | NEW | |
| 8 | BABA | Alibaba Group Holding-sp Adr | Stock-Consumer Disc | 6.03% | -13.16% | -33.33% | |
| 9 | LMND | Lemonade INC | Stock-Financials | 3.01% | -3.20% | — | |
| 10 | SOGP | Sound Group INC | Stock-Other | 0.81% | -0.20% | — |
Performance for Q3 2026
+3.1%
Performance Last 4 Quarters
+49.2%
Based on 5 months of available history
Based on 63% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 10 | $208.0M | 85 | |
| 2025-12-31 | 8 | $114.6M | 100 | |
| 2022-12-31 | 1 | — | 0 | |
| 2022-09-30 | 1 | $8.9M | 0 | |
| 2022-06-30 | 1 | — | 0 | |
| 2022-03-31 | 1 | — | 0 | |
| 2021-12-31 | 1 | — | 0 | |
| 2021-09-30 | 12 | $164.0M | 0 | |
| 2021-06-30 | 12 | $179.1M | 22 | |
| 2021-03-31 | 12 | $148.7M | 9 | |
| 2020-12-31 | 12 | $149.4M | 0 |
Ma Investment Partnership, LP's most significant position changes for 2026-03-31: New buy: Nvidia CORP (NVDA); New buy: Reddit Inc-cl A (RDDT); Trim: Advanced Micro Devices (AMD) — shares -33.33%; Trim: Alibaba Group Holding-sp Adr (BABA) — shares -33.33%; Add: Viavi Solutions INC (VIAV) — shares +150.00%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | SNDK | Sandisk CORP | +9.8% | — | Unchanged |
| 2 | VIAV | Viavi Solutions INC | +4.9% | +150.00% | Add |
| 3 | SOGP | Sound Group INC | -0.2% | — | Unchanged |
| 4 | BE | Bloom Energy Corp- A | -1.1% | — | Unchanged |
| 5 | VRT | Vertiv Holdings Co-a | -2.1% | — | Unchanged |
| 6 | LMND | Lemonade INC | -3.2% | — | Unchanged |
| 7 | BABA | Alibaba Group Holding-sp Adr | -13.2% | -33.33% | Trim |
| 8 | AMD | Advanced Micro Devices | -18.3% | -33.33% | Trim |
| 9 | NVDA | Nvidia CORP | — | NEW | New buy |
| 10 | RDDT | Reddit Inc-cl A | — | NEW | New buy |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-18 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-05-18 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-08 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-15 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-16 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-17 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
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