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 Mar 31, 2025
Ownership Breakdown
1,353
Institutional Holders
▼ 41 vs Q4
$59.13B
Total Inst. Value
▼ $7.48B vs Q4
103.02M
Shares Outstanding
freeFloat 97.94%
93.34M
13F Shares Held
▼ 119,894 vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC pharmaceutical preparations | 9.41M | 8.82% | 8.82% | $5.97T | May 9, 2025 | ▲ 121.5K |
BLACKROCK, INC. pharmaceutical preparations | 8.93M | 8.37% | 8.37% | $5.66T | May 2, 2025 | ▲ 194.3K |
FMR LLC pharmaceutical preparations | 7.60M | 7.12% | 7.12% | $4.82T | May 12, 2025 | ▼ 601.0K |
JPMORGAN CHASE & CO pharmaceutical preparations | 5.66M | 5.30% | 5.30% | $3.59T | May 12, 2025 | ▼ 1.40M |
STATE STREET CORP pharmaceutical preparations | 4.79M | 4.49% | 4.49% | $3.04T | May 15, 2025 | ▼ 42.6K |
CAPITAL INTERNATIONAL INVESTORS pharmaceutical preparations | 3.99M | 3.74% | 3.74% | $2.53T | May 12, 2025 | ▼ 747.8K |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 2.47M | 2.31% | 2.31% | $1.56T | May 13, 2025 | ▲ 42.0K |
DODGE & COX pharmaceutical preparations | 2.32M | 2.18% | 2.18% | $1.47T | May 14, 2025 | ▲ 2.8K |
FRANKLIN RESOURCES INC pharmaceutical preparations | 2.28M | 2.13% | 2.13% | $1.44T | May 13, 2025 | ▲ 231.5K |
PRICE T ROWE ASSOCIATES INC /MD/ pharmaceutical preparations | 2.18M | 2.04% | 2.04% | $1.38T | May 14, 2025 | ▲ 89.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
31
Increased
+3.72M shares1
New Positions
first time holders18
Decreased
−4.22M shares0
Sold Out
fully exitedNet shares change (top 50)
500.2K
+3.72M / −4.22M
Net new holders
+14
1 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 90.6% of total shares outstanding. Company insiders own approximately 2.06%, while retail and public investors account for the remaining 7.34%.
The largest institutional shareholder of Regeneron Pharmaceuticals, Inc. is VANGUARD GROUP INC, holding approximately 9.41 million shares — equal to 8.82% of outstanding shares — as of March 31, 2025.
A total of 1,353 institutional investors currently hold REGN stock, with a combined institutional value of approximately $59.13 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 90.6% of shares. The largest shareholder is VANGUARD GROUP INC with a 8.82% stake. Company insiders hold 2.06%. Data sourced from SEC Form 13F as of March 31, 2025.