William Blair & Company’s ThredUp TDUP Stock Holding History

William Blair & Company’s Portfolio TDUP Stock Details TDUP Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$6.83M	Buy	2,082,554 +576,399	+38%	+$2.67M	0.02%	431
2025 Q4	$9.62M	Buy	1,506,155 +71,802	+5%	+$581K	0.03%	364
2025 Q3	$13.6M	Sell	1,434,353 -1,210,692	-46%	-$11.5M	0.04%	293
2025 Q2	$19.8M	Sell	2,645,045 -324,680	-11%	-$1.91M	0.06%	230
2025 Q1	$7.16M	Buy	2,969,725 +939,449	+46%	+$2.16M	0.02%	400
2024 Q4	$2.82M	Sell	2,030,276 -180,794	-8%	-$203K	0.01%	640
2024 Q3	$1.86M	Buy	2,211,070 +1,299,418	+143%	+$1.59M	0.01%	728
2024 Q2	$1.55M	Buy	911,652 +674,852	+285%	+$1.23M	﹤0.01%	756
2024 Q1	$474K	Buy	236,800 +207,300	+703%	+$423K	﹤0.01%	1099
2023 Q4	$66.4K	Buy	29,500 +17,500	+146%	+$45.5K	﹤0.01%	1561
2023 Q3	$48.1K	Buy	+12,000	New	+$40.7K	﹤0.01%	1591

Other funds holding TDUP

NIM

Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return

William Blair & Company's TDUP Position: Q1 2026 in Review

William Blair & Company increased its ThredUp (TDUP) stake by 38% in Q1 2026, buying an estimated $2.67M and bringing the position to 2,082,554 shares worth $6.83M. The position accounts for 0.02% of the portfolio, ranked #431.

William Blair & Company first reported a position in TDUP in Q3 2023 and has held it in 11 quarters since. The position peaked at $19.8M in Q2 2025. 174 funds tracked by Wall St. Rank hold TDUP as of Q1 2026.

William Blair & Company held 2,082,554 shares of ThredUp worth $6.83M as of Q1 2026.
William Blair & Company bought 576,399 ThredUp shares in Q1 2026, an estimated $2.67M.
ThredUp made up 0.02% of William Blair & Company's portfolio in Q1 2026, its #431 holding.
William Blair & Company first reported a position in ThredUp in Q3 2023 and has held it in 11 quarters since.
William Blair & Company's ThredUp position peaked at $19.8M in Q2 2025.
174 funds tracked by Wall St. Rank held ThredUp as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.