William Blair Investment Management
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William Blair Investment Management’s Neogen NEOG Stock Holding History

William Blair Investment Management’s Portfolio NEOG Stock Details NEOG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-5,907,034
Closed -$33.7M – 444
2025
Q3 		$33.7M Sell
5,907,034
-3,495,986
-37% -$18.7M 0.09% 191
2025
Q2 		$44.9M Sell
9,403,020
-4,155,912
-31% -$23.9M 0.12% 148
2025
Q1 		$118M Sell
13,558,932
-787,827
-5% -$8.26M 0.33% 88
2024
Q4 		$174M Buy
14,346,759
+1,074,825
+8% +$15M 0.43% 74
2024
Q3 		$223M Buy
13,271,934
+1,258,862
+10% +$20.7M 0.55% 51
2024
Q2 		$188M Buy
12,013,072
+4,717,696
+65% +$65.6M 0.49% 62
2024
Q1 		$115M Sell
7,295,376
-240,793
-3% -$4.03M 0.3% 100
2023
Q4 		$152M Buy
7,536,169
+2,740,643
+57% +$46.4M 0.44% 77
2023
Q3 		$88.9M Buy
4,795,526
+306,111
+7% +$6.67M 0.3% 103
2023
Q2 		$97.6M Buy
+4,489,415
New +$81.2M 0.31% 98

Other funds holding NEOG

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
CCP
Clarkston Capital Partners Rochester, Michigan $1.31B AUM 3.79% 1-Year Est. Return
IG
ING Group Amsterdam, Netherlands $16.4B AUM 34.6% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
GCM
Gates Capital Management New York $3.66B AUM 12.63% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Mackenzie Financial
Mackenzie Financial Toronto Ontario, Ontario, Canada $83.3B AUM 31.19% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
CWM
CIBC World Markets New York $20.8B AUM

William Blair Investment Management's NEOG Position: Q4 2025 in Review

William Blair Investment Management sold out of Neogen (NEOG) in Q4 2025, closing a stake of 5,907,034 shares — an estimated $33.7M sold.

William Blair Investment Management first reported a position in NEOG in Q2 2023 and held it in 10 quarters. The position peaked at $223M in Q3 2024. 305 funds tracked by Wall St. Rank hold NEOG as of Q4 2025.

  • William Blair Investment Management reported no remaining Neogen position as of Q4 2025 after selling out during the quarter.
  • William Blair Investment Management sold 5,907,034 Neogen shares in Q4 2025, an estimated $33.7M.
  • William Blair Investment Management first reported a position in Neogen in Q2 2023 and held it in 10 quarters.
  • William Blair Investment Management's Neogen position peaked at $223M in Q3 2024.
  • 305 funds tracked by Wall St. Rank held Neogen as of Q4 2025.

Based on William Blair Investment Management's 13F filing for Q4 2025, filed 9 Feb 2026.