Stocks/Funds/CIK 816788

TANAKA CAPITAL MANAGEMENT INC

microcap filerlong-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 816788
Assets
$57M
+30.4% YoY
Holdings
41
Lifetime alpha vs market
+9.89% annual
Average hold time
7.6 yr
median 9.3 yr

Quarterly history

Cum return +96% vs S&P +37% · α +58% lifetimeAUM $57M · peak $79MFlow $3M (+5%)2016-032017-092019-032020-092022-032023-092025-032026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-2.69%
trims when stocks drop
when a holding falls −10%+
Middle response
-2.86%
baseline attrition
Rally response
-2.04%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
UAMYUnited States Antimony C$5M9.4%+393.2%0.8 yr
NXENexGen Energy Ltd.$5M8.9%+75.8%9.8 yr
CORTCorcept Therapeutics Inc$4M7.8%-20.0%9.3 yr
NVDANVIDIA Corporation$4M7.6%+29.9%7.8 yr
$4M7.2%1.5 yr
NUVBNuvation Bio Inc.$4M6.8%+61.3%0.8 yr
AAPLApple Inc.$3M5.7%+1.9%9.3 yr
CPRXCatalyst Pharmaceuticals$3M4.9%+18.6%10.3 yr
ONTOOnto Innovation Inc.$3M4.5%+23.0%6.3 yr
AMATApplied Materials, Inc.$2M4.2%+112.5%9.5 yr
CCJCameco Corporation$2M4.1%+111.8%9.0 yr
SYMSymbotic Inc.$2M4.0%+124.4%3.5 yr
AFLAflac Incorporated$2M3.9%+9.0%9.3 yr
$2M3.5%0.8 yr
SFStifel Financial Corp.$1M2.5%+7.5%10.3 yr

Portfolio composition (YoY)

Industry mix
Biotechnology19.6%-1.2pp$11M
Semiconductors18.3%-2.4pp$10M
Uranium14.9%+3.0pp$8M
Unknown13.6%+8.5pp$8M
Industrial Materials9.4%$5M
Consumer Electronics5.7%-8.2pp$3M
Industrial - Machinery4.0%-2.0pp$2M
Insurance - Life3.9%-1.7pp$2M
Financial - Capital Markets2.5%-1.3pp$1M
Specialty Retail2.2%-0.5pp$1M
Country
US73.2%-8.1pp
Unknown13.6%+8.5pp
CA13.0%+2.4pp
IE0.2%-1.0pp
Top 5: 40.9% · Top 10: 67.0% · Top 25: 99.4%

Winners

TickerPrev $PnLYoY %
NXE$4M+0.00B75.8%
SYM$2M+0.00B124.4%
AMAT$1M+0.00B112.5%
NVDA$4M+0.00B29.9%
CCJ$1M+0.00B111.8%

Losers

TickerPrev $PnLYoY %
CORT$6M-0.00B-20.0%
ACN$1M-0.00B-42.6%
QCOM$2M-0.00B-13.7%
AMZN$1M-0.00B-5.1%
MA$1M-0.00B-4.6%

Top buys this quarter · 8

PEP PepsiCo, Inc.+$1M
CCJ Cameco Corporation+$1M
SF Stifel Financial Corp.+$1M
MA Mastercard Incorporated+$0M
NUVB Nuvation Bio Inc.+$4M
AMZN Amazon.com, Inc.+$0M
QCOM QUALCOMM Incorporated+$1M
+$0M

Top sells this quarter · 14

PM Philip Morris International In$1M
ONTO Onto Innovation Inc.$2M
NXE NexGen Energy Ltd.$4M
AFL Aflac Incorporated$0M
GTLS Chart Industries, Inc.exit$0M
CPRX Catalyst Pharmaceuticals, Inc.$3M
AAPL Apple Inc.$0M
SYM Symbotic Inc.$0M
AMAT Applied Materials, Inc.$2M
CORT Corcept Therapeutics Incorpora$4M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$57M41+31.20%+1.62%+29.58%+0.00B
2025-12-31$54M42+33.21%+8.91%+24.30%+0.00B
2025-09-30$53M42+41.00%+12.19%+28.81%+0.00B
2025-03-31$42M41+22.78%+8.30%+14.48%-0.01B
2024-12-31$44M43+13.65%+24.89%-11.23%-0.00B
2024-09-30$43M44+30.49%+36.04%-5.55%-0.00B
2024-06-30$42M46+23.46%+24.49%-1.03%-0.00B
2024-03-31$41M47+36.24%+29.62%+6.62%-0.00B
2023-12-31$41M48+53.90%+26.18%+27.73%-0.00B
2023-09-30$35M45+34.19%+21.57%+12.62%-0.00B
2023-06-30$37M46+42.34%+19.42%+22.92%-0.00B
2023-03-31$34M47-3.18%-7.82%+4.64%-0.00B
2022-12-31$32M46+2.39%+7.56%-5.17%-0.00B
2022-09-30$34M46+4.33%-4.93%+9.26%+0.00B
2022-06-30$31M46-20.20%-16.11%-4.08%-0.01B
2022-03-31$50M51-0.00B