Regeneron Pharmaceuticals, Inc.
Regeneron Pharmaceuticals, Inc. (REGN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · REGN · as of Sep 30, 2025
Ownership Breakdown
1,314
Institutional Holders
▲ 35 vs Q2
$48.94B
Total Inst. Value
▲ $2.05B vs Q2
103.02M
Shares Outstanding
freeFloat 97.94%
87.07M
13F Shares Held
▼ 2.41M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
REGN largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC pharmaceutical preparations | 9.05M | 8.61% | 8.61% | $5.09T | Nov 7, 2025 | ▼ 375.8K |
BLACKROCK, INC. pharmaceutical preparations | 8.84M | 8.41% | 8.41% | $4.97T | Nov 12, 2025 | ▼ 438.9K |
STATE STREET CORP pharmaceutical preparations | 4.69M | 4.46% | 4.46% | $2.64T | Nov 14, 2025 | ▼ 140.8K |
DODGE & COX pharmaceutical preparations | 4.55M | 4.33% | 4.33% | $2.56T | Nov 13, 2025 | ▲ 724.6K |
JPMORGAN CHASE & CO pharmaceutical preparations | 4.07M | 3.87% | 3.87% | $2.29T | Nov 26, 2025 | ▲ 132.7K |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 2.54M | 2.41% | 2.41% | $1.42T | Nov 12, 2025 | ▲ 70.8K |
FRANKLIN RESOURCES INC pharmaceutical preparations | 2.45M | 2.33% | 2.33% | $1.38T | Nov 13, 2025 | ▲ 139.6K |
CAPITAL WORLD INVESTORS pharmaceutical preparations | 2.00M | 1.90% | 1.90% | $1.12T | Nov 13, 2025 | ▲ 32.3K |
LOOMIS SAYLES & CO L P pharmaceutical preparations | 1.98M | 1.88% | 1.88% | $1.11T | Nov 13, 2025 | ▲ 38.4K |
FMR LLC pharmaceutical preparations | 1.94M | 1.84% | 1.84% | $1.09T | Nov 13, 2025 | ▼ 1.39M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
32
Increased
+4.56M shares0
New Positions
first time holders18
Decreased
−5.59M shares0
Sold Out
fully exitedNet shares change (top 50)
1.03M
+4.56M / −5.59M
Net new holders
+14
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
REGN insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
9
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
RYAN ARTHUR F director | May 1, 2026 | Sale | 5 | $701.76 | $3.5K | 17.6K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 15 | $702.46 | $10.5K | 17.6K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 24 | $703.46 | $16.9K | 17.6K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 15 | $704.28 | $10.6K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 14 | $705.56 | $9.9K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 7 | $706.74 | $4.9K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 4 | $707.40 | $2.8K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 6 | $709.45 | $4.3K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 2 | $710.87 | $1.4K | 17.5K | Form 4 ↗ |
RYAN ARTHUR F director | May 1, 2026 | Sale | 5 | $711.49 | $3.6K | 17.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Regeneron Pharmaceuticals, Inc. (REGN) is primarily owned by institutional investors, who hold approximately 84.5% of total shares outstanding. Company insiders own approximately 2.06%, while retail and public investors account for the remaining 13.42%.
The largest institutional shareholder of Regeneron Pharmaceuticals, Inc. is VANGUARD GROUP INC, holding approximately 9.05 million shares — equal to 8.61% of outstanding shares — as of September 30, 2025.
A total of 1,314 institutional investors currently hold REGN stock, with a combined institutional value of approximately $48.94 billion as of the most recent 13F filing period.
Frequently asked questions
REGN ownershipRegeneron Pharmaceuticals, Inc. (REGN) is primarily owned by institutional investors, who hold approximately 84.5% of shares. The largest shareholder is VANGUARD GROUP INC with a 8.61% stake. Company insiders hold 2.06%. Data sourced from SEC Form 13F as of September 30, 2025.