CIK: 0000816788
Total reported value
$59.9M
Reporting period: 2026-03-31 · Number of holdings: 44
TANAKA CAPITAL MANAGEMENT INC disclosed 44 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $59.9M and a quarterly turnover rate of 29.6%.
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Tanaka Capital Management INC's disclosed holdings carry a Herfindahl concentration index of 0.054 — mathematically equivalent to about 18 equally-sized positions, well below its 44 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 1.17), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 3.5 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Sector classification currently covers about 26% 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 NUVB
+7.2% -$3.7M
Add UAMY
0.0% $2.3M
Add IJR
+132.2% $2.0M
Add G06973104
+11.7% $1.8M
Trim NVDA
-0.1% -$305.0K
Add CCJ
+31.6% $843.0K
Showing top 43 holdings (of 44 total)
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | UAMY | United States Antimony CORP | Stock-Other | 8.98% | +3.34% | — | |
| 2 | NXE | Nexgen Energy LTD | Stock-Other | 8.51% | +1.08% | -0.77% | |
| 3 | CORT | Corcept Therapeutics INC | Stock-Healthcare | 7.46% | +0.41% | -0.21% | |
| 4 | NVDA | Nvidia CORP | Stock-Tech | 7.22% | -1.22% | -0.12% | |
| 5 | ✓ | Aura Minerals, Inc. | Stock-Other | 6.82% | +2.70% | +11.71% | |
| 6 | NUVB | Nuvation Bio INC | Stock-Other | 6.46% | -7.30% | +7.16% | |
| 7 | AAPL | Apple INC | Stock-Tech | 5.45% | -0.97% | -0.60% | |
| 8 | IJR | Ishares Core S&p Small-cap E | ETF-Small Cap | 4.74% | +3.16% | +132.15% | |
| 9 | CPRX | Catalyst Pharmaceuticals INC | Stock-Healthcare | 4.69% | -0.18% | -0.87% | |
| 10 | ONTO | Onto Innovation INC | Stock-Tech | 4.26% | +0.56% | -3.00% | |
| 11 | AMAT | Applied Materials INC | Stock-Tech | 3.97% | +0.66% | -0.50% | |
| 12 | CCJ | Cameco CORP | Stock-Energy | 3.91% | +1.17% | +31.64% | |
| 13 | SYM | Symbotic INC | Stock-Industrials | 3.83% | -0.88% | -0.60% | |
| 14 | AFL | Aflac INC | Stock-Financials | 3.67% | -0.42% | -1.62% | |
| 15 | ELVA | Electrovaya INC | Stock-Other | 3.32% | -0.34% | — | |
| 16 | SF | Stifel Financial CORP | Stock-Financials | 2.36% | -0.55% | +49.98% | |
| 17 | CG | The Carlyle Group Inc. | Stock-Financials | 2.33% | -0.77% | — | |
| 18 | AMZN | Amazon.com INC | Stock-Consumer Disc | 2.10% | -0.02% | +20.03% | |
| 19 | QCOM | Qualcomm INC | Stock-Tech | 1.96% | -0.46% | +17.59% | |
| 20 | PEP | Pepsico INC | Stock-Consumer Staples | 1.84% | +1.07% | +140.92% | |
| 21 | UEC | Uranium Energy CORP | Stock-Energy | 1.73% | +0.09% | — | |
| 22 | MA | Mastercard INC - A | Stock-Financials | 1.58% | +0.33% | +57.62% | |
| 23 | PM | Philip Morris International | Stock-Consumer Staples | 0.79% | -1.06% | -55.00% | |
| 24 | META | Meta Platforms Inc-class A | Stock-Comm Services | 0.77% | -0.20% | -0.74% | |
| 25 | ✓ | ASML Holding N V ADR | Stock-Other | 0.49% | +0.05% | — | |
| 26 | ACN | Accenture plc | Stock-Tech | 0.17% | -0.08% | -1.76% | |
| 27 | IWB | Ishares Russell 1000 ETF | ETF-Other | 0.14% | -0.02% | — | |
| 28 | IWF | Ishares Russell 1000 Growth | ETF-Other | 0.11% | -0.02% | — | |
| 29 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.09% | -0.03% | -9.18% | |
| 30 | ✓ | Beyondspring INC Shs | Stock-Other | 0.07% | -0.01% | — | |
| 31 | IWD | Ishares Russell 1000 Value E | ETF-Other | 0.04% | -0.01% | — | |
| 32 | CL | Colgate-palmolive Co | Stock-Consumer Staples | 0.04% | — | — | |
| 33 | MDLZ | Mondelez International Inc-a | Stock-Consumer Staples | 0.02% | — | — | |
| 34 | BMY | Bristol-myers Squibb Co | Stock-Healthcare | 0.02% | — | — | |
| 35 | EFA | Ishares Msci Eafe ETF | ETF-Other | 0.02% | — | — | |
| 36 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 0.02% | — | — | |
| 37 | EFG | Ishares Msci Eafe Growth ETF | ETF-Other | 0.02% | — | — | |
| 38 | INTC | Intel CORP | Stock-Tech | 0.01% | — | — | |
| 39 | KHC | The Kraft Heinz Company | Stock-Consumer Staples | 0.01% | — | — | |
| 40 | CHD | Church & Dwight Co INC | Stock-Consumer Staples | — | — | — | |
| 41 | JNJ | Johnson & Johnson | Stock-Healthcare | — | — | — | |
| 42 | TRV | Travelers Cos Inc/the | Stock-Financials | — | — | — | |
| 43 | ✓ | Fuelnation, Inc. | Stock-Other | — | — | — |
Performance for Q3 2026
+2.2%
Performance Last 4 Quarters
+33.1%
Based on 83% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 44 | $59.9M | 30 | |
| 2025-12-31 | 45 | $54.8M | 33 | |
| 2025-09-30 | 45 | $55.5M | 51 | |
| 2025-03-31 | 42 | $42.0M | 100 | |
| 2024-12-31 | 44 | $43.7M | 0 | |
| 2024-09-30 | 45 | $43.2M | 0 | |
| 2024-06-30 | 47 | $42.2M | 0 | |
| 2024-03-31 | 48 | $40.6M | 0 | |
| 2023-12-31 | 49 | $40.9M | 0 | |
| 2023-09-30 | 47 | $35.0M | 0 | |
| 2023-06-30 | 48 | $37.0M | 0 | |
| 2023-03-31 | 49 | $34.4M | 0 | |
| 2022-12-31 | 48 | $31.5M | 0 | |
| 2022-09-30 | 48 | $33.5M | 0 | |
| 2022-06-30 | 48 | $30.8M | 0 | |
| 2022-03-31 | 53 | $49.5M | 0 | |
| 2021-12-31 | 53 | $52.6M | 0 | |
| 2021-09-30 | 56 | $70.1M | 0 | |
| 2021-06-30 | 55 | $74.0M | 100 | |
| 2021-03-31 | 51 | $78.8M | 59 | |
| 2020-12-31 | 51 | $45.0M | 42 | |
| 2020-09-30 | 53 | $31.9M | 24 | |
| 2020-06-30 | 53 | $32.3M | 37 | |
| 2020-03-31 | 51 | $22.9M | 33 | |
| 2019-12-31 | 51 | $31.6M | 37 | |
| 2019-09-30 | 51 | $31.0M | 23 | |
| 2019-06-30 | 52 | $32.6M | 22 | |
| 2019-03-31 | 54 | $33.2M | 23 | |
| 2018-12-31 | 55 | $31.5M | 34 | |
| 2018-09-30 | 54 | $43.0M | 19 | |
| 2018-06-30 | 55 | $41.7M | 22 | |
| 2018-03-31 | 51 | $41.8M | 42 | |
| 2017-12-31 | 51 | $43.8M | 18 | |
| 2017-09-30 | 51 | $44.9M | 23 | |
| 2017-06-30 | 54 | $43.6M | 22 | |
| 2017-03-31 | 57 | $45.4M | 28 | |
| 2016-12-31 | 56 | $42.7M | 59 | |
| 2016-09-30 | 56 | $41.7M | 42 | |
| 2016-06-30 | 54 | $38.9M | 52 | |
| 2016-03-31 | 61 | $44.4M | 47 | |
| 2015-12-31 | 92 | $46.4M | 56 | |
| 2015-09-30 | 61 | $39.5M | 46 | |
| 2015-06-30 | 62 | $40.3M | 33 | |
| 2015-03-31 | 58 | $36.2M | 25 | |
| 2014-12-31 | 55 | $33.6M | 46 | |
| 2014-09-30 | 32 | $34.3M | 28 | |
| 2014-06-30 | 34 | $37.8M | 20 | |
| 2014-03-31 | 34 | $32.9M | 30 | |
| 2013-12-31 | 33 | $34.0M | 20 | |
| 2013-09-30 | 32 | $29.1M | 42 | |
| 2013-06-30 | 38 | $28.0M | 0 |
Tanaka Capital Management INC's most significant position changes for 2026-03-31: Sold out: Chart Industries INC (GTLS); Add: Nuvation Bio INC (NUVB) — shares +7.16%; Add: Ishares Core S&p Small-cap E (IJR) — shares +132.15%; Add: Aura Minerals, Inc. — shares +11.71%; Trim: Nvidia CORP (NVDA) — shares -0.12%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | UAMY | United States Antimony CORP | +3.3% | — | Unchanged |
| 2 | IJR | Ishares Core S&p Small-cap E | +3.2% | +132.15% | Add |
| 3 | ✓ | Aura Minerals, Inc. | +2.7% | +11.71% | Add |
| 4 | CCJ | Cameco CORP | +1.2% | +31.64% | Add |
| 5 | NXE | Nexgen Energy LTD | +1.1% | -0.77% | Trim |
| 6 | PEP | Pepsico INC | +1.1% | +140.92% | Add |
| 7 | AMAT | Applied Materials INC | +0.7% | -0.50% | Trim |
| 8 | ONTO | Onto Innovation INC | +0.6% | -3.00% | Trim |
| 9 | CORT | Corcept Therapeutics INC | +0.4% | -0.21% | Trim |
| 10 | MA | Mastercard INC - A | +0.3% | +57.62% | Add |
| 11 | UEC | Uranium Energy CORP | +0.1% | — | Unchanged |
| 12 | ✓ | ASML Holding N V ADR | +0.1% | — | Unchanged |
| 13 | KHC | The Kraft Heinz Company | — | — | Unchanged |
| 14 | CL | Colgate-palmolive Co | — | — | Unchanged |
| 15 | INTC | Intel CORP | — | — | Unchanged |
| 16 | MDLZ | Mondelez International Inc-a | — | — | Unchanged |
| 17 | BMY | Bristol-myers Squibb Co | — | — | Unchanged |
| 18 | EFG | Ishares Msci Eafe Growth ETF | — | — | Unchanged |
| 19 | ✓ | Fuelnation, Inc. | — | — | Unchanged |
| 20 | TRV | Travelers Cos Inc/the | — | — | Unchanged |
| 21 | JNJ | Johnson & Johnson | — | — | Unchanged |
| 22 | CHD | Church & Dwight Co INC | — | — | Unchanged |
| 23 | EFA | Ishares Msci Eafe ETF | — | — | Unchanged |
| 24 | PG | Procter & Gamble Co/the | — | — | Unchanged |
| 25 | IWD | Ishares Russell 1000 Value E | 0% | — | Unchanged |
| 26 | ✓ | Beyondspring INC Shs | 0% | — | Unchanged |
| 27 | AMZN | Amazon.com INC | 0% | +20.03% | Add |
| 28 | IWF | Ishares Russell 1000 Growth | 0% | — | Unchanged |
| 29 | IWB | Ishares Russell 1000 ETF | 0% | — | Unchanged |
| 30 | JPM | Jpmorgan Chase & Co | 0% | -9.18% | Trim |
| 31 | ACN | Accenture plc | -0.1% | -1.76% | Trim |
| 32 | CPRX | Catalyst Pharmaceuticals INC | -0.2% | -0.87% | Trim |
| 33 | META | Meta Platforms Inc-class A | -0.2% | -0.74% | Trim |
| 34 | ELVA | Electrovaya INC | -0.3% | — | Unchanged |
| 35 | AFL | Aflac INC | -0.4% | -1.62% | Trim |
| 36 | QCOM | Qualcomm INC | -0.5% | +17.59% | Add |
| 37 | SF | Stifel Financial CORP | -0.6% | +49.98% | Add |
| 38 | CG | The Carlyle Group Inc. | -0.8% | — | Unchanged |
| 39 | SYM | Symbotic INC | -0.9% | -0.60% | Trim |
| 40 | AAPL | Apple INC | -1% | -0.60% | Trim |
| 41 | PM | Philip Morris International | -1.1% | -55.00% | Trim |
| 42 | NVDA | Nvidia CORP | -1.2% | -0.12% | Trim |
| 43 | NUVB | Nuvation Bio INC | -7.3% | +7.16% | Add |
| 44 | GTLS | Chart Industries INC | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-18 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-15 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-15 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-12 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-15 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-15 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-13 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-11 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-17 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-15 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-15 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-16 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-15 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-16 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-16 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-16 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-15 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-16 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-15 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-17 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-16 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-07 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-13 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-17 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-12 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-13 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-13 | Amendment | View on EDGAR |
| 2014-03-31 | 2014-05-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-12 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-12 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-12 | 13F-HR | View on EDGAR |
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