William Blair & Company
OLN icon

William Blair & Company’s Olin OLN Stock Holding History

William Blair & Company’s Portfolio OLN Stock Details OLN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$331K Buy
16,703
+4,562
+38% +$119K ﹤0.01% 1379
2026
Q1 		$361K Buy
+12,141
New +$297K ﹤0.01% 1259
2024
Q4 		– Sell
-12,503
Closed -$600K – 1865
2024
Q3 		$600K Buy
+12,503
New +$556K ﹤0.01% 1064
2022
Q2 		– Sell
-4,221
Closed -$221K – 1911
2022
Q1 		$221K Sell
4,221
-479
-10% -$24.5K ﹤0.01% 1483
2021
Q4 		$270K Buy
4,700
+50
+1% +$2.8K ﹤0.01% 1457
2021
Q3 		$224K Hold
4,650
– – ﹤0.01% 1447
2021
Q2 		$215K Sell
4,650
-8,800
-65% -$396K ﹤0.01% 1474
2021
Q1 		$511K Buy
13,450
+1,300
+11% +$39.4K ﹤0.01% 1113
2020
Q4 		$298K Sell
12,150
-19,000
-61% -$387K ﹤0.01% 1272
2020
Q3 		$386K Buy
31,150
+5,250
+20% +$60.7K ﹤0.01% 1044
2020
Q2 		$298K Buy
+25,900
New +$330K ﹤0.01% 1095
2016
Q2 		– Sell
-11,984
Closed -$208K – 1260
2016
Q1 		$208K Buy
+11,984
New +$185K ﹤0.01% 1059

Other funds holding OLN

Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $34.3B AUM 22.63% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
YAM
Yacktman Asset Management Austin, Texas $8.09B AUM 19.03% 1-Year Est. Return
Pzena Investment Management
Pzena Investment Management New York $34.1B AUM 23.81% 1-Year Est. Return

William Blair & Company's OLN Position: Q2 2026 in Review

William Blair & Company increased its Olin (OLN) stake by 38% in Q2 2026, buying an estimated $119K and bringing the position to 16,703 shares worth $331K. The position accounts for ﹤0.01% of the portfolio, ranked #1379.

William Blair & Company first reported a position in OLN in Q1 2016 and has held it in 12 quarters since. The position peaked at $600K in Q3 2024. 413 funds tracked by Wall St. Rank hold OLN as of Q2 2026.

  • William Blair & Company held 16,703 shares of Olin worth $331K as of Q2 2026.
  • William Blair & Company bought 4,562 Olin shares in Q2 2026, an estimated $119K.
  • Olin made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1379 holding.
  • William Blair & Company first reported a position in Olin in Q1 2016 and has held it in 12 quarters since.
  • William Blair & Company's Olin position peaked at $600K in Q3 2024.
  • 413 funds tracked by Wall St. Rank held Olin as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.