Ole Andreas Halvorsen
Viking Global Investors
Ole Andreas Halvorsen CoStar Group Inc stake
total: 670
Viking Global Investors CSGP trades
- Total transactions:
- 10
- New positions:
- 3
- Sold out:
- 3
- Reduced:
- 4
- Held since:
- 2025 Q2
- Held for:
- 3 quarters
- Latest activity:
- 2026 Q1
According to 2026 Q2 report, Ole Andreas Halvorsen doesn't hold any CoStar Group Inc (CSGP) shares. To date, the estimated cost basis is nearly $80.4 for "buy" trades and estimated average "sell" price is $74.53. Viking Global Investors first purchased CSGP in 2020 Q3, initially acquiring about 3.00M shares. Ole Andreas Halvorsen later completely sold out the position and invested in CoStar Group Inc again in 2025 Q2. Since the initial investment in CoStar Group Inc (CSGP), Viking Global Investors has made 9 more transactions.
When did Ole Andreas Halvorsen sell CoStar Group Inc (CSGP)?
Ole Andreas Halvorsen sold off the entire CoStar Group Inc (CSGP) position in 2026 Q1.
When did Ole Andreas Halvorsen buy CoStar Group Inc (CSGP)?
Ole Andreas Halvorsen first invested in CoStar Group Inc (CSGP) in 2020 Q3 at the reported quarter-end price of $84.85 per share.
What's the cost basis of Viking Global Investors's CSGP stake?
The estimated cost basis for CoStar Group Inc (CSGP) stake is around $80.40 per share. This represents their average reported price* across all buy transactions
Estimated cost basis*
- Weighted AVG buy price:
- $80.40
- Weighted AVG sell price:
- $74.52
Ole Andreas Halvorsen's historical trades in CoStar Group Inc
10 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q1
|
0.00%
|
0
|
$67.24
|
|
-100% (-1,442,582)
|
-0.26%
|
|
2025 Q4
|
0.26%
|
1,442,582
|
$67.24
|
$96,999,214
|
-22.01% (-407,147)
|
-0.07%
|
|
2025 Q3
|
0.41%
|
1,849,729
|
$84.37
|
$156,061,636
|
-42.53% (-1,368,839)
|
-0.33%
|
|
2025 Q2
|
0.75%
|
3,218,568
|
$80.40
|
$258,772,867
|
new
|
+0.75%
|
|
2025 Q1
|
0.00%
|
0
|
$71.59
|
|
-100% (-1,162,703)
|
-0.27%
|
|
2024 Q4
|
0.27%
|
1,162,703
|
$71.59
|
$83,237,908
|
-7.81% (-98,492)
|
-0.03%
|
|
2024 Q3
|
0.35%
|
1,261,195
|
$75.44
|
$95,144,551
|
new
|
+0.35%
|
|
2021 Q1
|
0.00%
|
0
|
$92.43
|
|
-100% (-709,490)
|
-0.18%
|
|
2020 Q4
|
0.18%
|
$92.43
|
-76.36% (-2,291,970)
|
|||
|
2020 Q3
|
0.92%
|
$84.85
|
new
|
|||
* 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.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.