Ole Andreas Halvorsen
Viking Global Investors
Ole Andreas Halvorsen Sionna Therapeutics, Inc stake
total: 670
Viking Global Investors SION trades
- Total transactions:
- 2
- New positions:
- 1
- Added:
- 1
- Held since:
- 2025 Q1
- Held for:
- 6 quarters
- Latest activity:
- 2025 Q2
According to 2026 Q2 report, Ole Andreas Halvorsen holds 3,195,181 Sionna Therapeutics, Inc (SION) shares with a market value of roughly $140.56M accounting for 0.40% of the overall portfolio. To date, the estimated cost basis is nearly $10.98 for "buy" trades. Viking Global Investors first purchased SION in 2025 Q1, initially acquiring about 2.95M shares. Since the initial investment in Sionna Therapeutics, Inc (SION), Viking Global Investors has made 1 more transaction.
When did Ole Andreas Halvorsen buy Sionna Therapeutics, Inc (SION)?
Ole Andreas Halvorsen first invested in Sionna Therapeutics, Inc (SION) in 2025 Q1 at the reported quarter-end price of $10.46 per share.
What's the cost basis of Viking Global Investors's SION stake?
The estimated cost basis for Sionna Therapeutics, Inc (SION) stake is around $10.98 per share. This represents their average reported price* across all buy transactions
Estimated cost basis*
- Weighted AVG buy price:
- $10.98
Ole Andreas Halvorsen's historical trades in Sionna Therapeutics, Inc
2 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2025 Q2
|
0.16%
|
3,195,181
|
$17.35
|
$55,436,390
|
+8.21% (+242,427)
|
+0.01%
|
|
2025 Q1
|
0.10%
|
2,952,754
|
$10.46
|
$30,885,807
|
new
|
+0.1%
|
* 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.