William Blair & Company
PTLO icon

William Blair & Company’s Portillo's PTLO Stock Holding History

William Blair & Company’s Portfolio PTLO Stock Details PTLO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$5.89M Buy
1,112,922
+127,902
+13% +$696K 0.02% 468
2025
Q4 		$4.47M Sell
985,020
-278,896
-22% -$1.46M 0.01% 548
2025
Q3 		$8.15M Sell
1,263,916
-363,399
-22% -$3.07M 0.02% 409
2025
Q2 		$19M Buy
1,627,315
+14,303
+0.9% +$165K 0.05% 239
2025
Q1 		$19.2M Buy
1,613,012
+392,964
+32% +$5.11M 0.06% 226
2024
Q4 		$11.5M Sell
1,220,048
-442,782
-27% -$5.07M 0.03% 316
2024
Q3 		$22.4M Buy
1,662,830
+1,636
+0.1% +$18.3K 0.07% 214
2024
Q2 		$16.1M Sell
1,661,194
-474,574
-22% -$5.28M 0.05% 247
2024
Q1 		$30.3M Sell
2,135,768
-363,148
-15% -$5.04M 0.1% 166
2023
Q4 		$39.8M Buy
2,498,916
+2,921
+0.1% +$45.1K 0.14% 137
2023
Q3 		$38.4M Buy
2,495,995
+241,069
+11% +$4.71M 0.15% 132
2023
Q2 		$50.8M Buy
2,254,926
+756,325
+50% +$15.8M 0.19% 116
2023
Q1 		$32M Buy
1,498,601
+758,979
+103% +$15.9M 0.13% 147
2022
Q4 		$12.1M Buy
739,622
+298,976
+68% +$5.99M 0.05% 274
2022
Q3 		$8.68M Sell
440,646
-45,022
-9% -$991K 0.04% 306
2022
Q2 		$7.94M Buy
485,668
+284,154
+141% +$5.48M 0.04% 331
2022
Q1 		$4.95M Sell
201,514
-558,300
-73% -$14.8M 0.02% 469
2021
Q4 		$28.5M Buy
+759,814
New +$30.5M 0.09% 201

Other funds holding PTLO

OAG
Orbis Allan Gray Hamilton, Bermuda $23.7B AUM 65.43% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
EC
Engaged Capital Newport Beach, California $303M AUM 2.09% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
ZIG
Zuckerman Investment Group Chicago, Illinois $1.07B AUM 29.43% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Select Equity Group
Select Equity Group New York $19.5B AUM 17.33% 1-Year Est. Return

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

William Blair & Company increased its Portillo's (PTLO) stake by 13% in Q1 2026, buying an estimated $696K and bringing the position to 1,112,922 shares worth $5.89M. The position accounts for 0.02% of the portfolio, ranked #468.

William Blair & Company first reported a position in PTLO in Q4 2021 and has held it in 18 quarters since. The position peaked at $50.8M in Q2 2023. 186 funds tracked by Wall St. Rank hold PTLO as of Q1 2026.

  • William Blair & Company held 1,112,922 shares of Portillo's worth $5.89M as of Q1 2026.
  • William Blair & Company bought 127,902 Portillo's shares in Q1 2026, an estimated $696K.
  • Portillo's made up 0.02% of William Blair & Company's portfolio in Q1 2026, its #468 holding.
  • William Blair & Company first reported a position in Portillo's in Q4 2021 and has held it in 18 quarters since.
  • William Blair & Company's Portillo's position peaked at $50.8M in Q2 2023.
  • 186 funds tracked by Wall St. Rank held Portillo's as of Q1 2026.

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