ProPhase Labs, Inc.
ProPhase Labs, Inc. (PRPH) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PRPH · as of Sep 30, 2025
Ownership Breakdown
31
Institutional Holders
▼ 3 vs Q2
$1.39M
Total Inst. Value
▲ $344,953 vs Q2
4.74M
Shares Outstanding
freeFloat 91.22%
2.99M
13F Shares Held
▲ 314,374 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
PRPH largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
SYKON CAPITAL LLC pharmaceutical preparations | 644.8K | 1.55% | 1.55% | $295.19M | Nov 14, 2025 | — held |
VANGUARD GROUP INC pharmaceutical preparations | 531.9K | 1.28% | 1.28% | $243.62M | Nov 7, 2025 | ▲ 123.7K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP pharmaceutical preparations | 397.9K | 95.79% | 95.79% | $182.16M | Nov 14, 2025 | ▲ 295.9K |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 302.9K | 72.92% | 72.92% | $138.70M | Nov 12, 2025 | ▲ 43.9K |
ACCRETIVE WEALTH PARTNERS, LLC pharmaceutical preparations | 250.0K | 60.18% | 60.18% | $114.45M | Nov 7, 2025 | NEW |
HIGHTOWER ADVISORS, LLC pharmaceutical preparations | 237.3K | 57.13% | 57.13% | $108.65M | Nov 7, 2025 | ▲ 7.9K |
APOLLON WEALTH MANAGEMENT, LLC pharmaceutical preparations | 182.5K | 43.92% | 43.92% | $83.53M | Oct 17, 2025 | NEW |
CHAPIN DAVIS, INC. pharmaceutical preparations | 80.0K | 19.26% | 19.26% | $36.62M | Oct 9, 2025 | — held |
TWO SIGMA SECURITIES, LLC pharmaceutical preparations | 47.5K | 11.43% | 11.43% | $21.73M | Nov 14, 2025 | ▲ 9.6K |
STATE STREET CORP pharmaceutical preparations | 44.7K | 10.75% | 10.75% | $20.45M | Nov 14, 2025 | — held |
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
8
Increased
+531.6K shares6
New Positions
first time holders5
Decreased
−269.0K shares10
Sold Out
fully exitedNet shares change (top 50)
+262.6K
+531.6K / −269.0K
Net new holders
-1
6 new / 10 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PRPH insider trading · insider activity
Source: SEC Form 4
1
Buy transactions
0
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 |
|---|---|---|---|---|---|---|---|
Karkus Ted William CEO & CHAIRMAN | Sep 9, 2025 | Award | 500,000 | $0.60 | $300.0K | 500.0K | Form 4 ↗ |
Hollenshead Stuart Chief Operating Officer | Feb 17, 2025 | Award | 500,000 | $0.60 | $300.0K | 500.0K | Form 4 ↗ |
Hirsch Warren director | Feb 14, 2025 | Award | 100,000 | $0.60 | $60.0K | 100.0K | Form 4 ↗ |
GLECKEL LOUIS MD director | Feb 14, 2025 | Award | 100,000 | $0.60 | $60.0K | 100.0K | Form 4 ↗ |
Karkus Ted William CEO & CHAIRMAN | Mar 17, 2024 | Award | 400,000 | $6.00 | $2.40M | 400.0K | Form 4 ↗ |
Latkin Jed director | Jan 1, 2024 | Award | 500,000 | $6.00 | $3.00M | 500.0K | Form 4 ↗ |
Hirsch Warren director | Mar 17, 2024 | Award | 70,000 | $6.00 | $420.0K | 70.0K | Form 4 ↗ |
GLECKEL LOUIS MD director | Mar 17, 2024 | Award | 70,000 | $6.00 | $420.0K | 70.0K | Form 4 ↗ |
Barr Jason Michael director | Mar 17, 2024 | Award | 70,000 | $6.00 | $420.0K | 70.0K | Form 4 ↗ |
Karkus Ted William CEO & CHAIRMAN | Mar 17, 2024 | Award | 400,000 | $6.00 | $2.40M | 400.0K | 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
ProPhase Labs, Inc. (PRPH) is primarily owned by institutional investors, who hold approximately 63.2% of total shares outstanding. Company insiders own approximately 8.78%, while retail and public investors account for the remaining 28.05%.
The largest institutional shareholder of ProPhase Labs, Inc. is SYKON CAPITAL LLC, holding approximately 644,795 shares — equal to 1.55% of outstanding shares — as of September 30, 2025.
A total of 31 institutional investors currently hold PRPH stock, with a combined institutional value of approximately $1,392,793 as of the most recent 13F filing period.
Frequently asked questions
PRPH ownershipProPhase Labs, Inc. (PRPH) is primarily owned by institutional investors, who hold approximately 63.2% of shares. The largest shareholder is SYKON CAPITAL LLC with a 1.55% stake. Company insiders hold 8.78%. Data sourced from SEC Form 13F as of September 30, 2025.