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Mason Capital Management’s Mesa Laboratories MLAB Stock Holding History

Mason Capital Management’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
-70,300
Closed -$5.52M – 9
2025
Q4 		$5.52M Hold
70,300
– – 0.98% 8
2025
Q3 		$4.71M Buy
+70,300
New +$5.06M 0.96% 5

Other funds holding MLAB

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BlackRock
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Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Select Equity Group
Select Equity Group New York $20.2B AUM 17.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
RIM
Ranger Investment Management Dallas, Texas $1.58B AUM 51% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Diamond Hill Capital Management
Diamond Hill Capital Management Columbus, Ohio $12.5B AUM 7.49% 1-Year Est. Return

Mason Capital Management's MLAB Position: Q1 2026 in Review

Mason Capital Management sold out of Mesa Laboratories (MLAB) in Q1 2026, closing a stake of 70,300 shares — an estimated $5.52M sold.

Mason Capital Management first reported a position in MLAB in Q3 2025 and held it in 2 quarters. The position peaked at $5.52M in Q4 2025. 161 funds tracked by Wall St. Rank hold MLAB as of Q1 2026.

  • Mason Capital Management reported no remaining Mesa Laboratories position as of Q1 2026 after selling out during the quarter.
  • Mason Capital Management sold 70,300 Mesa Laboratories shares in Q1 2026, an estimated $5.52M.
  • Mason Capital Management first reported a position in Mesa Laboratories in Q3 2025 and held it in 2 quarters.
  • Mason Capital Management's Mesa Laboratories position peaked at $5.52M in Q4 2025.
  • 161 funds tracked by Wall St. Rank held Mesa Laboratories as of Q1 2026.

Based on Mason Capital Management's 13F filing for Q1 2026, filed 15 May 2026.