Harry Burn
Sound Shore Management
Harry Burn Regeneron Pharmaceuticals Inc stake
total: 193
Sound Shore Management REGN trades
- Total transactions:
- 3
- New positions:
- 1
- Added:
- 1
- Reduced:
- 1
- Held since:
- 2025 Q3
- Held for:
- 3 quarters
- Latest activity:
- 2026 Q1
According to 2026 Q1 report, Harry Burn holds 150,960 Regeneron Pharmaceuticals Inc (REGN) shares with a market value of roughly $116.64M accounting for 3.91% of the overall portfolio. To date, the estimated cost basis is nearly $634.79 for "buy" trades and estimated average "sell" price is $772.64. Sound Shore Management first purchased REGN in 2025 Q3, initially acquiring 115,028 shares. Since the initial investment in Regeneron Pharmaceuticals Inc (REGN), Sound Shore Management has made 2 more transactions.
When did Harry Burn buy Regeneron Pharmaceuticals Inc (REGN)?
Harry Burn first invested in Regeneron Pharmaceuticals Inc (REGN) in 2025 Q3 at the reported quarter-end price of $562.27 per share.
What's the cost basis of Sound Shore Management's REGN stake?
The estimated cost basis for Regeneron Pharmaceuticals Inc (REGN) stake is around $634.79 per share. This represents their average reported price* across all buy transactions
Estimated cost basis*
- Weighted AVG buy price:
- $634.79
- Weighted AVG sell price:
- $772.64
Harry Burn's historical trades in Regeneron Pharmaceuticals Inc
3 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q1
|
3.91%
|
150,960
|
$772.64
|
$116,637,734
|
-14.17% (-24,927)
|
-0.61%
|
|
2025 Q4
|
4.32%
|
175,887
|
$771.87
|
$135,761,899
|
+52.91% (+60,859)
|
+1.49%
|
|
2025 Q3
|
2.14%
|
115,028
|
$562.27
|
$64,676,793
|
new
|
+2.14%
|
* 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.