Jim Simons’s Mesa Laboratories MLAB Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $2.79M | Buy |
31,600
+28,100
| +803% | +$2.42M | ﹤0.01% | 1698 |
|
|
2025
Q4 | $275K | Sell |
3,500
-7,400
| -68% | -$563K | ﹤0.01% | 2793 |
|
|
2025
Q3 | $730K | Sell |
10,900
-57,127
| -84% | -$4.11M | ﹤0.01% | 2641 |
|
|
2025
Q2 | $6.41M | Buy |
68,027
+59,827
| +730% | +$6.57M | 0.01% | 1359 |
|
|
2025
Q1 | $973K | Buy |
8,200
+700
| +9% | +$95.4K | ﹤0.01% | 2448 |
|
|
2024
Q4 | $989K | Sell |
7,500
-5,900
| -44% | -$724K | ﹤0.01% | 2504 |
|
|
2024
Q3 | $1.74M | Buy |
13,400
+11,000
| +458% | +$1.29M | ﹤0.01% | 2112 |
|
|
2024
Q2 | $208K | Sell |
2,400
-13,700
| -85% | -$1.43M | ﹤0.01% | 3033 |
|
|
2024
Q1 | $1.77M | Sell |
16,100
-14,300
| -47% | -$1.44M | ﹤0.01% | 2115 |
|
|
2023
Q4 | $3.19M | Buy |
30,400
+21,600
| +245% | +$2.1M | ﹤0.01% | 1646 |
|
|
2023
Q3 | $925K | Sell |
8,800
-14,200
| -62% | -$1.82M | ﹤0.01% | 2361 |
|
|
2023
Q2 | $2.96M | Buy |
23,000
+13,300
| +137% | +$2.03M | ﹤0.01% | 1750 |
|
|
2023
Q1 | $1.7M | Sell |
9,700
-8,234
| -46% | -$1.48M | ﹤0.01% | 2130 |
|
|
2022
Q4 | $2.98M | Buy |
17,934
+9,734
| +119% | +$1.53M | ﹤0.01% | 1823 |
|
|
2022
Q3 | $1.16M | Sell |
8,200
-4,900
| -37% | -$894K | ﹤0.01% | 2405 |
|
|
2022
Q2 | $2.67M | Hold |
13,100
| – | – | ﹤0.01% | 1979 |
|
|
2022
Q1 | $3.34M | Sell |
13,100
-2,782
| -18% | -$756K | ﹤0.01% | 1853 |
|
|
2021
Q4 | $5.21M | Sell |
15,882
-11,218
| -41% | -$3.52M | 0.01% | 1506 |
|
|
2021
Q3 | $8.19M | Buy |
27,100
+3,400
| +14% | +$966K | 0.01% | 1149 |
|
|
2021
Q2 | $6.43M | Buy |
23,700
+11,800
| +99% | +$2.99M | 0.01% | 1479 |
|
|
2021
Q1 | $2.9M | Sell |
11,900
-2,200
| -16% | -$605K | ﹤0.01% | 1987 |
|
|
2020
Q4 | $4.04M | Sell |
14,100
-28,000
| -67% | -$7.7M | ﹤0.01% | 1723 |
|
|
2020
Q3 | $10.7M | Sell |
42,100
-7,000
| -14% | -$1.66M | 0.01% | 1080 |
|
|
2020
Q2 | $10.6M | Buy |
49,100
+15,200
| +45% | +$3.5M | 0.01% | 1180 |
|
|
2020
Q1 | $7.66M | Sell |
33,900
-32,000
| -49% | -$7.89M | 0.01% | 1324 |
|
|
2019
Q4 | $16.4M | Sell |
65,900
-14,600
| -18% | -$3.42M | 0.01% | 1118 |
|
|
2019
Q3 | $19.1M | Buy |
80,500
+33,700
| +72% | +$7.79M | 0.02% | 984 |
|
|
2019
Q2 | $11.4M | Sell |
46,800
-7,100
| -13% | -$1.65M | 0.01% | 1312 |
|
|
2019
Q1 | $12.4M | Sell |
53,900
-8,400
| -13% | -$1.9M | 0.01% | 1244 |
|
|
2018
Q4 | $13M | Sell |
62,300
-400
| -0.6% | -$78K | 0.01% | 1157 |
|
|
2018
Q3 | $11.6M | Buy |
62,700
+200
| +0.3% | +$40.3K | 0.01% | 1263 |
|
|
2018
Q2 | $13.2M | Sell |
62,500
-11,500
| -16% | -$2.01M | 0.01% | 1195 |
|
|
2018
Q1 | $11M | Sell |
74,000
-4,600
| -6% | -$627K | 0.01% | 1308 |
|
|
2017
Q4 | $9.77M | Sell |
78,600
-5,600
| -7% | -$783K | 0.01% | 1404 |
|
|
2017
Q3 | $12.6M | Sell |
84,200
-3,071
| -4% | -$433K | 0.01% | 1185 |
|
|
2017
Q2 | $12.5M | Buy |
87,271
+7,771
| +10% | +$1.1M | 0.02% | 1120 |
|
|
2017
Q1 | $9.76M | Sell |
79,500
-3,800
| -5% | -$465K | 0.01% | 1265 |
|
|
2016
Q4 | $10.2M | Sell |
83,300
-10,859
| -12% | -$1.36M | 0.02% | 1205 |
|
|
2016
Q3 | $10.8M | Sell |
94,159
-7,441
| -7% | -$848K | 0.02% | 1107 |
|
|
2016
Q2 | $12.5M | Sell |
101,600
-34,800
| -26% | -$3.75M | 0.02% | 1002 |
|
|
2016
Q1 | $13.1M | Sell |
136,400
-2,199
| -2% | -$198K | 0.03% | 944 |
|
|
2015
Q4 | $13.8M | Buy |
138,599
+4,199
| +3% | +$449K | 0.03% | 766 |
|
|
2015
Q3 | $15M | Buy |
134,400
+207
| +0.2% | +$21.9K | 0.04% | 665 |
|
|
2015
Q2 | $11.9M | Sell |
134,193
-5,907
| -4% | -$499K | 0.03% | 836 |
|
|
2015
Q1 | $10.1M | Sell |
140,100
-7,124
| -5% | -$531K | 0.02% | 931 |
|
|
2014
Q4 | $11.4M | Sell |
147,224
-20,576
| -12% | -$1.51M | 0.03% | 804 |
|
|
2014
Q3 | $9.7M | Buy |
167,800
+7,200
| +4% | +$522K | 0.03% | 773 |
|
|
2014
Q2 | $13.5M | Buy |
160,600
+26,457
| +20% | +$2.19M | 0.03% | 675 |
|
|
2014
Q1 | $12.1M | Buy |
134,143
+7,955
| +6% | +$676K | 0.03% | 761 |
|
|
2013
Q4 | $9.92M | Buy |
126,188
+14,988
| +13% | +$1.09M | 0.02% | 810 |
|
|
2013
Q3 | $7.52M | Buy |
111,200
+22,000
| +25% | +$1.41M | 0.02% | 948 |
|
|
2013
Q2 | $4.83M | Buy |
+89,200
| New | +$4.63M | 0.01% | 1120 |
|
Other funds holding MLAB
LPP
VCM
RIM
RA
Jim Simons's MLAB Position: Q1 2026 in Review
Jim Simons increased its Mesa Laboratories (MLAB) stake by 803% in Q1 2026, buying an estimated $2.42M and bringing the position to 31,600 shares worth $2.79M. The position accounts for ﹤0.01% of the portfolio, ranked #1698.
Jim Simons first reported a position in MLAB in Q2 2013 and has held it in 52 quarters since. The position peaked at $19.1M in Q3 2019. 161 funds tracked by Wall St. Rank hold MLAB as of Q1 2026.
- Jim Simons held 31,600 shares of Mesa Laboratories worth $2.79M as of Q1 2026.
- Jim Simons bought 28,100 Mesa Laboratories shares in Q1 2026, an estimated $2.42M.
- Mesa Laboratories made up ﹤0.01% of Jim Simons's portfolio in Q1 2026, its #1698 holding.
- Jim Simons first reported a position in Mesa Laboratories in Q2 2013 and has held it in 52 quarters since.
- Jim Simons's Mesa Laboratories position peaked at $19.1M in Q3 2019.
- 161 funds tracked by Wall St. Rank held Mesa Laboratories as of Q1 2026.
Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.