Charles Bobrinskoy
Ariel Focus Fund
Ariel Focus Fund Portfolio 13F
Charles Bobrinskoy Holdings Activity
- Portfolio value:
- $81.23M~ (+$6M~)
- Previous value:
- $75.37M~
- # of changes:
- 16
- New positions:
- 2
- Reported for:
- 31 Mar 2026 (Q1)
- Latest filing date:
- 28 May 2026
Ariel Focus Fund has disclosed a total of 16 changes to the portfolio in the (2026 Q1) SEC report(s): increased the number of shares of 5, bought 2 totally new, decreased the number of shares of 8 and completely sold out 1 position(s).
What stocks did Charles Bobrinskoy buy in 2026 Q1?
During 2026 Q1 Charles Bobrinskoy has bought 7 securities out of which top 5 purchases (by % change to portfolio) were (LH) Laboratory Corp of America Holdings (added shares +24.97%), (FISV) Fiserv, Inc (added shares +50.80%), (MSGS) Madison Square Garden Sports Corp (added shares +34.91%), (AJG) Arthur J Gallagher & Co (added shares +12.37%) and (FDS) FactSet Research Systems Inc (new buy).
16 results
| History | Ticker | Name |
% or activity |
Shares change |
Shares held after* |
% change to portfolio |
Reported price* |
% difference current price* |
% of portfolio |
Held since* | Held for* |
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
Bio-Rad Laboratories Inc
|
new
|
+1,502
|
1,502
|
+0.52%
|
$278.75
|
+36.98%($381.84)
|
0.52%
|
2026 Q1
|
~0.25 years
|
|
|
|
FactSet Research Systems Inc
|
new
|
+7,844
|
7,844
|
+2.1%
|
$216.99
|
+37.25%($297.82)
|
2.10%
|
2026 Q1
|
~0.25 years
|
|
|
|
NORTHERN INST TRSRY-PRM
|
+64.22%
|
+651,128.81
|
1,664,971.07
|
+0.8%
|
$1.00
|
0.00%($1.00)
|
2.05%
|
2019 Q3
|
~6.75 years
|
|
|
|
Fiserv, Inc
|
+50.80%
|
+14,607
|
43,362
|
+1%
|
$55.80
|
-6.54%($52.15)
|
2.98%
|
2025 Q4
|
~0.50 years
|
|
|
|
Madison Square Garden Sports Corp
|
+34.91%
|
+1,501
|
5,801
|
+0.59%
|
$321.40
|
+24.47%($400.04)
|
2.30%
|
2021 Q3
|
~4.75 years
|
|
|
|
Laboratory Corp of America Holdings
|
+24.97%
|
+2,277
|
11,397
|
+0.75%
|
$266.81
|
+25.49%($334.82)
|
3.74%
|
2019 Q3
|
~6.75 years
|
|
|
|
Arthur J Gallagher & Co
|
+12.37%
|
+888
|
8,065
|
+0.24%
|
$216.58
|
+21.44%($263.01)
|
2.15%
|
2025 Q3
|
~0.75 years
|
|
|
|
Affiliated Managers Group, Inc
|
-3.49%
|
-496
|
13,722
|
-0.18%
|
$276.70
|
+29.11%($357.26)
|
4.67%
|
2024 Q2
|
~2.00 years
|
|
|
|
Barrick Mining Corp
|
-4.25%
|
-4,183
|
94,325
|
-0.23%
|
$40.79
|
+16.49%($47.52)
|
4.74%
|
2021 Q2
|
~5.00 years
|
|
|
|
Schlumberger NV
|
-4.56%
|
-3,984
|
83,310
|
-0.27%
|
$51.39
|
+4.25%($53.58)
|
5.27%
|
2024 Q4
|
~1.50 years
|
|
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
* Current price: this can be a delayed price and may not reflect the real-time market value, however it is too close.
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* Held since / Held for: calculated since the latest "new buy" position. If the security was previously exited and re-entered, only the most recent holding period is counted. 2013 Q2 is the earliest period we have data for, so "2013 Q2*" means "2013 Q2 or earlier".