X0202 SCHEDULE 13G/A 0000919574-24-006453 0001167212 XXXXXXXX LIVE 3 Class A Common Stock, $0.0001 par value per share 03/31/2026 0001484778 ThredUp Inc. 88556E102 969 Broadway, Suite 200 Oakland CA 94607 Rule 13d-1(c) Needham Investment Management L.L.C. b DE 0.00 9275000.00 0.00 9275000.00 9275000.00 N 8.7 IA OO Needham Asset Management, LLC b DE 0.00 9275000.00 0.00 9275000.00 9275000.00 N 8.7 HC OO Needham Aggressive Growth Fund b MD 0.00 9275000.00 0.00 9275000.00 9275000.00 N 8.7 IV OO George A. Needham b X1 0.00 9275000.00 0.00 9275000.00 9275000.00 N 8.7 HC IN ThredUp Inc. 969 Broadway, Suite 200 Oakland, California 94607 United States of America Needham Investment Management L.L.C. Needham Asset Management, LLC Needham Aggressive Growth Fund George A. Needham Needham Investment Management L.L.C. 250 Park Avenue, 10th Floor New York, New York 10117-1099 United States of America Needham Asset Management, LLC c/o Needham Investment Management L.L.C. 250 Park Avenue, 10th Floor New York, New York 10117-1099 United States of America Needham Aggressive Growth Fund c/o Needham Investment Management L.L.C. 250 Park Avenue, 10th Floor New York, New York 10117-1099 United States of America George A. Needham c/o Needham Investment Management L.L.C. 250 Park Avenue, 10th Floor New York, New York 10117-1099 United States of America Needham Investment Management L.L.C. - Delaware Needham Asset Management, LLC - Delaware Needham Aggressive Growth Fund - Maryland George A. Needham - United States Y Needham Investment Management L.L.C. - 9,275,000 Needham Asset Management, LLC - 9,275,000 Needham Aggressive Growth Fund - 9,275,000 George A. Needham - 9,275,000 Needham Investment Management L.L.C. - 8.7% Needham Asset Management, LLC - 8.7% Needham Aggressive Growth Fund - 8.7% George A. Needham - 8.7% Needham Investment Management L.L.C. - 0 Needham Asset Management, LLC - 0 Needham Aggressive Growth Fund - 0 George A. Needham - 0 Needham Investment Management L.L.C. - 9,275,000 Needham Asset Management, LLC - 9,275,000 Needham Aggressive Growth Fund - 9,275,000 George A. Needham - 9,275,000 Needham Investment Management L.L.C. - 0 Needham Asset Management, LLC - 0 Needham Aggressive Growth Fund - 0 George A. Needham - 0 Needham Investment Management L.L.C. - 9,275,000 Needham Asset Management, LLC - 9,275,000 Needham Aggressive Growth Fund - 9,275,000 George A. Needham - 9,275,000 Y N All of the securities reported in this Schedule 13G Amendment No. 3 are directly owned by advisory clients of Needham Investment Management L.L.C. None of those advisory clients, other than Needham Aggressive Growth Fund, may be deemed to beneficially own more than 5% of the Class A Common Stock, $0.0001 par value per share. N Please see Exhibit B attached hereto. Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit A - Joint Filing Agreement Exhibit B - Control Person Identification Needham Investment Management L.L.C. /s/ James W. Giangrasso 05/15/2026 Needham Asset Management, LLC /s/ James W. Giangrasso 05/15/2026 Needham Aggressive Growth Fund /s/ James W. Giangrasso 05/15/2026 George A. Needham /s/ George A. Needham 05/15/2026