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Livermore
Livermore
ZHEN

Tanaka Capital Management Inc

SEC CIK
0000816788
Latest filing
May 18, 2026

The latest 13F from Tanaka Capital Management Inc covers Q1 2026 (filed May 18, 2026): 43 long positions worth $59.9M. The top 10 holdings make up 64.6% of the portfolio, and the largest is United States Antimony Corp (UAMY) at 9.0%. Livermore has 20 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q1 2026

Share counts compared with Q4 2025: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
0
Added
9
Est. +$4.71M
Reduced
13
Est. −$826.2K
Sold out
1
Est. −$35.0K

Top 5 holdings

Share of this quarter's portfolio value

  1. UAMYUnited States Antimony Corp
    9.0%$5.38MHistory
  2. NXENexGen Energy Ltd.
    8.5%$5.09MHistory
  3. CORTCorcept Therapeutics Inc
    7.5%$4.47MHistory
  4. NVDANVIDIA Corp
    7.2%$4.32MHistory
  5. AUGOAura Minerals Inc.
    6.8%$4.09MHistory

Share of portfolio

Top 5 holdings and the other 38 positions, by share of portfolio value

  1. UAMY9.0%
  2. NXE8.5%
  3. CORT7.5%
  4. NVDA7.2%
  5. AUGO6.8%
  6. Other 38 positions61.0%

Biggest buys

New and added positions, by estimated amount bought

  1. iShares Core S&P Small Cap ETF464287804
    +$1.61MAdded
  2. PEPPepsiCo Inc
    +$644.6KAddedHistory
  3. CCJCameco Corp
    +$563.1KAddedHistory
  4. SFStifel Financial Corp
    +$470.2KAddedHistory
  5. AUGOAura Minerals Inc.
    +$428.4KAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. iShares Core S&P Small Cap ETF464287804
    +3.16 pp1.6% → 4.7%
  2. AUGOAura Minerals Inc.
    +2.70 pp4.1% → 6.8%History
  3. CCJCameco Corp
    +1.18 pp2.7% → 3.9%History
  4. PEPPepsiCo Inc
    +1.07 pp0.8% → 1.8%History
  5. MAMastercard Inc
    +0.33 pp1.3% → 1.6%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. PMPhilip Morris International Inc.
    −$575.7KReducedHistory
  2. ONTOOnto Innovation Inc.
    −$79.0KReducedHistory
  3. NXENexGen Energy Ltd.
    −$39.7KReducedHistory
  4. AFLAflac Inc
    −$36.2KReducedHistory
  5. GTLSChart Industries Inc
    −$35.0KSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. NVDANVIDIA Corp
    −1.22 pp8.4% → 7.2%History
  2. PMPhilip Morris International Inc.
    −1.07 pp1.9% → 0.8%History
  3. AAPLApple Inc.
    −0.97 pp6.4% → 5.4%History
  4. SYMSymbotic Inc.
    −0.88 pp4.7% → 3.8%History
  5. AFLAflac Inc
    −0.42 pp4.1% → 3.7%History

Metrics

13F metrics for Q1 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$59.9M
+$5.07M (+9.2%) vs. prior quarter
Positions
43
−1 vs. prior quarter
Top 10 concentration
64.6%
Top 10 as share of value
Turnover
1.5%
Q1 2026, one quarter
Average holding period
3.0 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

20 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $78.8M (Q1 2021)

Q1 2021: $78.8MQ2 2021: $74.0MQ3 2021: $70.1MQ4 2021: $52.6MQ1 2022: $49.5MQ2 2022: $30.8MQ3 2022: $33.5MQ4 2022: $31.5MQ1 2023: $34.4MQ2 2023: $37.0MQ3 2023: $35.0MQ4 2023: $40.9MQ1 2024: $40.6MQ2 2024: $42.2MQ3 2024: $43.2MQ4 2024: $43.7MQ1 2025: $42.0MQ3 2025: $55.5MQ4 2025: $54.8MQ1 2026: $59.9M
Q1 2021Q1 2026
13F filings of Tanaka Capital Management Inc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q1 2026May 18, 202643$59.9MUAMYNXECORTvs. Q4 2025SEC
Q4 2025Feb 17, 202644$54.8MNUVBNVDANXEvs. Q3 2025SEC
Q3 2025Nov 14, 202544$55.5MCORTUAMYNVDA–SEC
Q1 2025May 15, 202542$42.0MCORTAAPLCPRXvs. Q4 2024SEC
Q4 2024Feb 14, 202544$43.7MAAPLCORTNVDAvs. Q3 2024SEC
Q3 2024Nov 15, 202445$43.2MAAPLCORTNXEvs. Q2 2024SEC
Q2 2024Aug 15, 202447$42.2MAAPLONTONXEvs. Q1 2024SEC
Q1 2024May 15, 202448$40.6MNXEAAPLONTOvs. Q4 2023SEC
Q4 2023Feb 14, 202449$40.9MAAPLNXEONTOvs. Q3 2023SEC
Q3 2023Nov 14, 202347$35.0MAAPLNXEONTOvs. Q2 2023SEC
Q2 2023Aug 14, 202348$37.0MAAPLONTONXEvs. Q1 2023SEC
Q1 2023May 12, 202349$34.4MAAPLAMRSCPRXvs. Q4 2022SEC
Q4 2022Feb 15, 202348$31.5MAAPLAMRSNXEvs. Q3 2022SEC
Q3 2022Nov 15, 202248$33.5MAAPLAMRSNXEvs. Q2 2022SEC
Q2 2022Aug 15, 202248$30.8MAAPLAMRSNXEvs. Q1 2022SEC
Q1 2022May 16, 202253$49.5MAAPLAMRSNXEvs. Q4 2021SEC
Q4 2021Feb 14, 202253$52.6MAMRSAAPLNXEvs. Q3 2021SEC
Q3 2021Nov 15, 202156$70.1MAMRSAAPLBYSIvs. Q2 2021SEC
Q2 2021Aug 13, 202155$74.0MAMRSAAPLONTOvs. Q1 2021SEC
Q1 2021May 17, 202150$78.8MAMRSAAPLQCOM–SEC