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TANAKA CAPITAL MANAGEMENT INC: SF position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of TANAKA CAPITAL MANAGEMENT INC on SF, newest first. How the timeline and the estimate are built.

TANAKA CAPITAL MANAGEMENT INC held 19,090 SF shares at 2026-03-31 per its 13F-HR filed 2026-05-18.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 19,090 shares
    Change vs previous 13F +6,362 shares

    2.36% of the 13F portfolio, value $1,411,000.

    13F-HR 0000816788-26-000002 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  2. period ended2025-12-31
    13F 12,728 shares
    Change vs previous 13F -75 shares

    2.91% of the 13F portfolio, value $1,594,000.

    13F-HR 0000816788-26-000001 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  3. period ended2025-09-30
    13F 12,803 shares
    Change vs previous 13F -2,825 shares

    2.62% of the 13F portfolio, value $1,453,000.

    13F-HR 0000816788-25-000005 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  4. period ended2025-03-31
    13F 15,628 shares
    Change vs previous 13F -53 shares

    3.51% of the 13F portfolio, value $1,473,000.

    13F-HR 0000816788-25-000002 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  5. period ended2024-12-31
    13F 15,681 shares
    Change vs previous 13F -40 shares

    3.8% of the 13F portfolio, value $1,663,000.

    13F-HR 0000816788-25-000001 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  6. period ended2024-09-30
    13F 15,721 shares
    Change vs previous 13F -90 shares

    3.41% of the 13F portfolio, value $1,476,000.

    13F-HR 0000816788-24-000004 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).

  7. period ended2024-06-30
    13F 15,811 shares
    Change vs previous 13F not available

    3.15% of the 13F portfolio, value $1,330,000.

    13F-HR 0000816788-24-000003 filed by TANAKA CAPITAL MANAGEMENT INC
    Filed (acceptance time not in the bulk data set), ingested

    Acceptance time not in the bulk data set (spec §4.2).