Marshall Wace
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Marshall Wace’s Mesa Laboratories MLAB Stock Holding History

Marshall Wace’s Portfolio MLAB Stock Details MLAB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-7,137
Closed -$560K – 3516
2025
Q4 		$560K Sell
7,137
-7,463
-51% -$568K ﹤0.01% 2194
2025
Q3 		$978K Buy
+14,600
New +$1.05M ﹤0.01% 1955
2025
Q1 		– Sell
-3,476
Closed -$458K – 2907
2024
Q4 		$458K Sell
3,476
-5,080
-59% -$624K ﹤0.01% 2067
2024
Q3 		$1.11M Sell
8,556
-6,004
-41% -$706K ﹤0.01% 1613
2024
Q2 		$1.26M Sell
14,560
-11,853
-45% -$1.24M ﹤0.01% 1583
2024
Q1 		$2.9M Buy
26,413
+10,566
+67% +$1.06M ﹤0.01% 1212
2023
Q4 		$1.66M Buy
15,847
+10,571
+200% +$1.03M ﹤0.01% 1299
2023
Q3 		$554K Buy
+5,276
New +$676K ﹤0.01% 1691
2022
Q3 		– Sell
-1,609
Closed -$328K – 3629
2022
Q2 		$328K Sell
1,609
-1,852
-54% -$405K ﹤0.01% 2991
2022
Q1 		$881K Sell
3,461
-222
-6% -$60.3K ﹤0.01% 2508
2021
Q4 		$1.21M Sell
3,683
-10,546
-74% -$3.31M ﹤0.01% 2378
2021
Q3 		$4.3M Sell
14,229
-3,149
-18% -$895K 0.02% 1024
2021
Q2 		$4.71M Buy
17,378
+156
+0.9% +$39.6K 0.02% 880
2021
Q1 		$4.19M Sell
17,222
-1,272
-7% -$350K 0.02% 934
2020
Q4 		$5.3M Sell
18,494
-2,066
-10% -$568K 0.03% 554
2020
Q3 		$5.24M Sell
20,560
-21,781
-51% -$5.18M 0.03% 499
2020
Q2 		$9.18M Buy
42,341
+34,666
+452% +$7.99M 0.06% 307
2020
Q1 		$1.74M Sell
7,675
-12,879
-63% -$3.18M 0.02% 678
2019
Q4 		$5.13M Sell
20,554
-27,964
-58% -$6.55M 0.04% 524
2019
Q3 		$11.5M Buy
+48,518
New +$11.2M 0.09% 260
2019
Q2 		– Sell
-3,961
Closed -$913K – 1650
2019
Q1 		$913K Buy
+3,961
New +$895K 0.01% 962
2018
Q4 		– Sell
-9,012
Closed -$1.67M – 1724
2018
Q3 		$1.67M Buy
+9,012
New +$1.81M 0.01% 716

Other funds holding MLAB

LPP
Long Path Partners Stamford, Connecticut $220M AUM 25.96% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
Select Equity Group
Select Equity Group New York $19.5B AUM 17.33% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
RIM
Ranger Investment Management Dallas, Texas $1.38B AUM 24.55% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
RA
Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return
Diamond Hill Capital Management
Diamond Hill Capital Management Columbus, Ohio $16B AUM 4.15% 1-Year Est. Return

Marshall Wace's MLAB Position: Q1 2026 in Review

Marshall Wace sold out of Mesa Laboratories (MLAB) in Q1 2026, closing a stake of 7,137 shares — an estimated $560K sold.

Marshall Wace first reported a position in MLAB in Q3 2018 and held it in 22 quarters. The position peaked at $11.5M in Q3 2019. 161 funds tracked by Wall St. Rank hold MLAB as of Q1 2026.

  • Marshall Wace reported no remaining Mesa Laboratories position as of Q1 2026 after selling out during the quarter.
  • Marshall Wace sold 7,137 Mesa Laboratories shares in Q1 2026, an estimated $560K.
  • Marshall Wace first reported a position in Mesa Laboratories in Q3 2018 and held it in 22 quarters.
  • Marshall Wace's Mesa Laboratories position peaked at $11.5M in Q3 2019.
  • 161 funds tracked by Wall St. Rank held Mesa Laboratories as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.