Alpine Immune Sciences, Inc.
Alpine Immune Sciences, Inc. (ALPN) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ALPN · as of Mar 31, 2024
Ownership Breakdown
190
Institutional Holders
▲ 55 vs Q4
$2.56B
Total Inst. Value
▲ $1.44B vs Q4
68.60M
Shares Outstanding
freeFloat 69.80%
64.59M
13F Shares Held
▲ 5.66M 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
ALPN largest shareholders · institutional ownership
Q1 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DECHENG CAPITAL LLC pharmaceutical preparations | 8.32M | 12.99% | 12.99% | $329.72B | May 14, 2024 | ▲ 1.23M |
AVORO CAPITAL ADVISORS LLC pharmaceutical preparations | 5.78M | 9.02% | 9.02% | $228.92B | May 15, 2024 | NEW |
BLACKROCK INC. pharmaceutical preparations | 3.58M | 5.58% | 5.58% | $141.72B | May 10, 2024 | ▲ 516.6K |
FRAZIER LIFE SCIENCES MANAGEMENT, L.P. pharmaceutical preparations | 3.13M | 4.89% | 4.89% | $124.11B | May 15, 2024 | — held |
PRICE T ROWE ASSOCIATES INC /MD/ pharmaceutical preparations | 3.08M | 4.81% | 4.81% | $122.10B | May 15, 2024 | ▲ 1.39M |
STATE STREET CORP pharmaceutical preparations | 2.85M | 4.44% | 4.44% | $112.81B | May 15, 2024 | ▲ 1.46M |
VANGUARD GROUP INC pharmaceutical preparations | 2.71M | 4.24% | 4.24% | $107.51B | May 10, 2024 | ▲ 477.5K |
CORMORANT ASSET MANAGEMENT, LP pharmaceutical preparations | 2.70M | 4.22% | 4.22% | $107.03B | May 15, 2024 | ▲ 150.0K |
ORBIMED ADVISORS LLC pharmaceutical preparations | 2.68M | 4.19% | 4.19% | $106.25B | May 15, 2024 | ▲ 145.3K |
LYNX1 CAPITAL MANAGEMENT LP pharmaceutical preparations | 2.25M | 3.52% | 3.52% | $89.32B | May 15, 2024 | ▼ 1.56M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2024 vs prior quarter
Q1 2024
27
Increased
+9.14M shares8
New Positions
first time holders12
Decreased
−7.58M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.56M
+9.14M / −7.58M
Net new holders
+23
8 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
ALPN insider trading · insider activity
Source: SEC Form 4
21
Buy transactions
122
Sell transactions
0.17
Buy/Sell ratio
$15M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Peetz Christopher director | May 20, 2024 | D-Return | 7,650 | $7.91 | $60.5K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 17,500 | $19.00 | $332.5K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 10,000 | $7.43 | $74.3K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 7,650 | $4.09 | $31.3K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 7,650 | $3.62 | $27.7K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 10,000 | $13.89 | $138.9K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 7,650 | $13.45 | $102.9K | 0 | Form 4 ↗ |
Peetz Christopher director | May 20, 2024 | D-Return | 1,900 | $65.00 | $123.5K | 0 | Form 4 ↗ |
Hernday Natasha director | May 20, 2024 | D-Return | 10,000 | $7.43 | $74.3K | 0 | Form 4 ↗ |
Hernday Natasha director | May 20, 2024 | D-Return | 10,000 | $13.89 | $138.9K | 0 | 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
Alpine Immune Sciences, Inc. (ALPN) is primarily owned by institutional investors, who hold approximately 94.2% of total shares outstanding. Company insiders own approximately 30.20%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Alpine Immune Sciences, Inc. is DECHENG CAPITAL LLC, holding approximately 8.32 million shares — equal to 12.99% of outstanding shares — as of March 31, 2024.
A total of 190 institutional investors currently hold ALPN stock, with a combined institutional value of approximately $2.56 billion as of the most recent 13F filing period.
Frequently asked questions
ALPN ownershipAlpine Immune Sciences, Inc. (ALPN) is primarily owned by institutional investors, who hold approximately 94.2% of shares. The largest shareholder is DECHENG CAPITAL LLC with a 12.99% stake. Company insiders hold 30.20%. Data sourced from SEC Form 13F as of March 31, 2024.