SEC ownership of ThredUp Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001484778.

Comparable stake leader

NEEDHAM INVESTMENT MANAGEMENT LLC

Disclosed value leader

James G. Reinhart

Comparable rows

50/50

Latest evidence

20 May 2026

Top shareholders Insider holders Latest transactions
Public ticker
TDUP on Nasdaq
Parsed ownership sources
13D/G, 13F, and 3/4/5
Largest SEC-reported holder
NEEDHAM INVESTMENT MANAGEMENT LLC
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 2 signals
Latest 13D/G holder
NEEDHAM INVESTMENT MANAGEMENT LLC
Latest parsed ownership date
20 May 2026
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001484778
Issuer location
Oakland, CA

Ownership snapshot

Top shareholders of ThredUp Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
NEEDHAM INVESTMENT MANAGE...
Disclosed value leader
James G. Reinhart
Comparable rows
50/50
Latest evidence
20 May 2026
13D/G 13F 3/4/5 Lead comparable stake: 8.7% 13D/G row: NEEDHAM INVESTMENT MANAGEMENT LLC Showing 1-8 of 50 holder rows.

Quick read

NEEDHAM INVESTMENT MANAGEMENT LLC leads the comparable SEC ownership view at 8.7%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens NEEDHAM INVESTMENT MANAGEMENT LLC's linked filing trail.
Comparable ownership Top 5
NEEDHAM INVESTMENT MANAGEMENT LLC 8.7%
Highland Management Partners VIII... 8.6%
Capital World Investors 8.4%
Highland Capital Partners VIII Li... 7.3%
BlackRock, Inc. 7.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
NEEDHAM INVESTMENT MANAGEMENT LLC
13D/G 13F
Needham Investment Management L.L.C. · Company
13D/G 13F
8.7%
$30,422,000
9,275,000 shares
 +$11,152,000 31 Mar 2026
Highland Management Partners VIII Limited Partnership
13D/G
Daniel Nova
13D/G
8.6%
$33,009,308
8,011,968 shares
 $0 31 Dec 2024
Capital World Investors
13D/G 13F
Company
13D/G 13F
8.4%
$55,641,564
8,707,600 shares
 $0 31 Dec 2025
Highland Capital Partners VIII Limited Partnership
13D/G
Daniel Nova
13D/G
7.3%
$52,106,175
8,154,331 shares
 $0 31 Dec 2025
BlackRock, Inc.
13D/G 13F
Company
13D/G 13F
7.3%
$48,864,969
7,647,100 shares
 $0 31 Dec 2025
James G. Reinhart
13D/G 3/4/5
Chief Executive Officer, Director
13D/G 3/4/5
6.9%
$70,406,214
7,450,393 shares
 -$3,927,949 30 Sep 2025
Trinity TVL X, LLC
3/4/5 13D/G
10%+ Owner · Patricia Nakache
3/4/5 13D/G
3.3%
from 13D/G
$17,572,830
8,425,298 shares
mixed-class rows
 — 09 Aug 2023
GOLDMAN SACHS ASSET MANAGEMENT, L.P.
13D/G
13D/G
1.3%
$4,662,035
1,131,562 shares
 $0 31 Dec 2024
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$17,235,190.

Buys
$571,377
Insiders: 2
Sells
$17,806,567
Insiders: 4
Net
-$17,235,190
Shares: -2,263,446
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 78,157 Shares: 2,341,603
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 13,157 282,040 $49,076 $1,250,716 -$1,201,641
3-6 0 341,583 $0 $1,304,950 -$1,304,950
6-9 65,000 898,094 $522,301 $6,964,678 -$6,442,377
9-12 0 819,886 $0 $8,286,223 -$8,286,223

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 24 reporting-owner rows connected to ThredUp Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
24
Largest Forms 3/4/5 holder
James G. Reinhart
Net 12M change
-$17,235,190
Latest report
01 Jun 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
James G. Reinhart Chief Executive Officer, Director $39,949,875 -$13,318,992 -25% Mixed 01 Jun 2026
Trinity TVL X, LLC 10%+ Owner $17,572,830 Mixed 09 Aug 2023
Redpoint Ventures IV, L.P. 10%+ Owner $15,073,162 Mixed 09 Nov 2021
GS INVESTMENT STRATEGIES, LLC 10%+ Owner $8,343,586 Filing P/S 09 Feb 2024
Christopher Homer Chief Operating Officer $8,258,309 -$1,046,825 -11% Mixed 01 Jun 2026
Upfront GP IV, L.P. 10%+ Owner $7,559,234 Mixed 15 Nov 2021
Upfront Ventures Management, LLC 10%+ Owner $7,559,234 Mixed 15 Nov 2021
Sean Sobers Chief Financial Officer $4,421,218 -$2,304,408 -34% Mixed 01 Jun 2026
Patricia Nakache Director $4,266,532 +$49,076 +1.2% Mixed 20 May 2026
Anthony Salvatore Marino President $3,153,802 Mixed 01 Dec 2023
Highland Management Partners VIII Ltd 10%+ Owner $2,707,627 Mixed 01 Dec 2021
Noam Paransky Director $2,244,526 Median 20 May 2026
Alon Rotem Chief Legal Officer $1,840,687 Mixed 01 Mar 2025
Ian Friedman Director $1,490,222 Median 20 May 2026
Timothy M. Haley Director $1,031,130 Median 20 May 2026
Amanda Ginsberg Director $941,926 Median 20 May 2026
Daniel J. Nova Director $905,745 +$522,301 +136% Median 20 May 2026
Coretha M. Rushing Director $627,008 -$1,136,342 -64% Median 20 May 2026
Marcie Vu Director $323,006 Mixed 17 Oct 2023
Jack R. Lazar Director $281,019 Filing P/S 03 Sep 2024

Recent insider transactions for ThredUp Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Christopher Homer TDUP Class A Common Stock Sale -4.52% $273,068 $4.43 -61,578 1,301,843 02 Jun 2026 Direct
James G. Reinhart TDUP Class A Common Stock Sale -10.7% $775,641 $4.43 -174,908 1,454,823 02 Jun 2026 Direct
Sean Sobers TDUP Class A Common Stock Sale -7.37% $202,007 $4.43 -45,554 572,523 02 Jun 2026 Direct
Christopher Homer TDUP Class A Common Stock Options Exercise 9.98% 122,495 1,350,273 01 Jun 2026 Direct
Christopher Homer TDUP Restricted Stock Units Options Exercise -16.2% -122,495 633,285 01 Jun 2026 Direct
James G. Reinhart TDUP Class A Common Stock Options Exercise 26.8% 330,649 1,566,490 01 Jun 2026 Direct
James G. Reinhart TDUP Restricted Stock Units Options Exercise -17.8% -330,649 1,526,510 01 Jun 2026 Direct
Sean Sobers TDUP Class A Common Stock Options Exercise 16.5% 86,109 608,299 01 Jun 2026 Direct
Sean Sobers TDUP Restricted Stock Units Options Exercise -15.6% -86,109 464,428 01 Jun 2026 Direct
Patricia Nakache TDUP Class A Common Stock Award 12.3% 37,265 340,583 20 May 2026 Direct
Kelly Bodnar Battles TDUP Class A Common Stock Award 94.5% 37,265 76,687 20 May 2026 Direct
Ian Friedman TDUP Class A Common Stock Award 8.93% 37,265 454,336 20 May 2026 Direct
Amanda Ginsberg TDUP Class A Common Stock Award 16.3% 37,265 265,745 20 May 2026 Direct
Timothy M. Haley TDUP Class A Common Stock Award 13.4% 37,265 314,369 20 May 2026 Direct
Noam Paransky TDUP Class A Common Stock Award 5.76% 37,265 684,307 20 May 2026 Direct
Daniel J. Nova TDUP Class A Common Stock Award 16.1% 37,265 269,252 20 May 2026 Direct
Coretha M. Rushing TDUP Class A Common Stock Award 24.2% 37,265 191,161 20 May 2026 Direct
Patricia Nakache TDUP Class A Common Stock Award 1.75% 5,231 303,318 22 Apr 2026 Direct
Ian Friedman TDUP Class A Common Stock Award 0.84% 3,488 417,071 22 Apr 2026 Direct
Timothy M. Haley TDUP Class A Common Stock Award 1.4% 3,836 277,104 22 Apr 2026 Direct
Noam Paransky TDUP Class A Common Stock Award 0.54% 3,488 647,042 22 Apr 2026 Direct
Coretha M. Rushing TDUP Class A Common Stock Award 2.32% 3,488 153,896 22 Apr 2026 Direct
Patricia Nakache TDUP Class A Common Stock Purchase 1529.9% $49,076 $3.73 13,157 14,017 10 Mar 2026 By Gordan/Nakache Family Trust U/A DTD 11/30/2001
James G. Reinhart TDUP Class A Common Stock Conversion of derivative security 57.1% 500,000 1,376,320 04 Mar 2026 Direct
James G. Reinhart TDUP Class B Common Stock Conversion of derivative security -52.8% -500,000 446,117 04 Mar 2026 Direct
James G. Reinhart TDUP Class B Common Stock Options Exercise 221.1% 500,000 726,117 04 Mar 2026 Direct
James G. Reinhart TDUP Stock Option (Right to Buy) Options Exercise -54.4% -500,000 420,000 04 Mar 2026 Direct
Christopher Homer TDUP Class A Common Stock Sale -5.19% $266,432 $3.82 -69,741 1,274,906 03 Mar 2026 Direct
James G. Reinhart TDUP Class A Common Stock Sale -19.7% $822,656 $3.82 -215,338 876,320 03 Mar 2026 Direct
Sean Sobers TDUP Class A Common Stock Sale -9.24% $215,862 $3.82 -56,504 555,254 03 Mar 2026 Direct
Christopher Homer TDUP Class A Common Stock Options Exercise 10% 122,495 1,344,647 01 Mar 2026 Direct
Christopher Homer TDUP Restricted Stock Units Options Exercise -14% -122,495 755,780 01 Mar 2026 Direct
James G. Reinhart TDUP Class A Common Stock Options Exercise 43.4% 330,650 1,091,658 01 Mar 2026 Direct
James G. Reinhart TDUP Restricted Stock Units Options Exercise -15.1% -330,650 1,857,159 01 Mar 2026 Direct
Sean Sobers TDUP Class A Common Stock Options Exercise 16.4% 86,109 611,758 01 Mar 2026 Direct
Sean Sobers TDUP Restricted Stock Units Options Exercise -13.5% -86,109 550,537 01 Mar 2026 Direct
Ian Friedman TDUP Class A Common Stock Award 0.54% 2,211 413,583 25 Feb 2026 Direct
Timothy M. Haley TDUP Class A Common Stock Award 0.9% 2,432 273,268 25 Feb 2026 Direct
Patricia Nakache TDUP Class A Common Stock Award 1.13% 3,317 298,087 25 Feb 2026 Direct
Noam Paransky TDUP Class A Common Stock Award 0.34% 2,211 643,554 25 Feb 2026 Direct
Coretha M. Rushing TDUP Class A Common Stock Award 1.49% 2,211 150,408 25 Feb 2026 Direct
James G. Reinhart TDUP Restricted Stock Units Award 40.2% 627,793 2,187,809 28 Jan 2026 Direct
Christopher Homer TDUP Restricted Stock Units Award 64.7% 344,941 878,275 28 Jan 2026 Direct
Sean Sobers TDUP Restricted Stock Units Award 80.2% 283,312 636,646 28 Jan 2026 Direct
Christopher Homer TDUP Class A Common Stock Sale -5.52% $507,326 $7.42 -68,358 1,170,567 02 Dec 2025 Direct
James G. Reinhart TDUP Class A Common Stock Sale -24.1% $1,474,598 $7.42 -198,690 626,001 02 Dec 2025 Direct
Sean Sobers TDUP Class A Common Stock Sale -9.37% $380,134 $7.42 -51,220 495,336 02 Dec 2025 Direct
Kelly Bodnar Battles TDUP Class A Common Stock Award 39,422 39,422 01 Dec 2025 Direct
Christopher Homer TDUP Class A Common Stock Options Exercise 14% 151,987 1,239,955 01 Dec 2025 Direct
Christopher Homer TDUP Restricted Stock Units Options Exercise -22.2% -151,987 533,334 01 Dec 2025 Direct
* marks a reported price that did not pass the local price check.
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