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Parallax Volatility Advisers, L.P.: UMC position timeline

Available 13F reports, 13D and 13G stakes and each Form 3, 4 and 5 line of Parallax Volatility Advisers, L.P. on UMC, newest first. How the timeline and the estimate are built.

Parallax Volatility Advisers, L.P. held 0 UMC shares at 2026-03-31 per its 13F-HR filed 2026-05-15.

the latest 13F is the newest step

  1. period ended2026-03-31
    13F 0 shares
    Change vs previous 13F -2,550 shares

    13F-HR 0001172661-26-002271 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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

    Exited: the 13F for this period no longer lists the position.

  2. period ended2025-12-31
    13F 2,550 shares
    Change vs previous 13F -3,978 shares

    <0.01% of the 13F portfolio, value $20,043.

    13F-HR 0001172661-26-001067 filed by Parallax Volatility Advisers, L.P.
    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 6,528 shares
    Change vs previous 13F +330 shares

    <0.01% of the 13F portfolio, value $49,482.

    13F-HR 0001172661-25-005017 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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

  4. period ended2025-06-30
    13F 6,198 shares
    Change vs previous 13F -4,401 shares

    <0.01% of the 13F portfolio, value $47,415.

    13F-HR 0001172661-25-003451 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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

  5. period ended2025-03-31
    13F 10,599 shares
    Change vs previous 13F -117,857 shares

    <0.01% of the 13F portfolio, value $75,783.

    13F-HR 0001172661-25-002304 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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

  6. period ended2024-12-31
    13F 128,456 shares
    Change vs previous 13F +100,289 shares

    0.02% of the 13F portfolio, value $833,679.

    13F-HR 0001172661-25-001026 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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

  7. period ended2024-09-30
    13F 28,167 shares
    Change vs previous 13F not available

    0.01% of the 13F portfolio, value $237,166.

    13F-HR 0001172661-24-004876 filed by Parallax Volatility Advisers, L.P.
    Filed (acceptance time not in the bulk data set), ingested

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