Protagenic Therapeutics, Inc.
Protagenic Therapeutics, Inc. (PTIX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PTIX · as of Sep 30, 2025
Ownership Breakdown
10
Institutional Holders
$344,382
Total Inst. Value
▲ $86,299 vs Q2
1.81M
Shares Outstanding
freeFloat 101.74%
100,411
13F Shares Held
▲ 29,800 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
PTIX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DRW SECURITIES, LLC services-business services, nec | 36.2K | 1.96% | 1.96% | $124.20M | Nov 14, 2025 | NEW |
CONNECTIVE CAPITAL MANAGEMENT, LLC services-business services, nec | 28.6K | 1.55% | 1.55% | $98.10M | Nov 17, 2025 | NEW |
FNY INVESTMENT ADVISERS, LLC services-business services, nec | 17.5K | 94.63% | 94.63% | $60.00M | Dec 15, 2025 | NEW |
MORGAN STANLEY services-business services, nec | 15.0K | 81.12% | 81.12% | $51.46M | May 27, 2026 | — held |
CITIGROUP INC services-business services, nec | 1.8K | 9.60% | 9.60% | $6.09M | Nov 10, 2025 | ▲ 1.4K |
TOWER RESEARCH CAPITAL LLC (TRC) services-business services, nec | 1.2K | 6.72% | 6.72% | $4.26M | Nov 14, 2025 | ▲ 366 |
UBS GROUP AG services-business services, nec | 56 | 0.30% | 0.30% | $192,000 | Nov 13, 2025 | ▼ 9.0K |
services-business services, nec | 17 | 0.09% | 0.09% | $58,000 | Nov 13, 2025 | NEW |
BANK OF AMERICA CORP /DE/ services-business services, nec | 8 | 0.04% | 0.04% | $27,000 | Feb 3, 2026 | ▲ 2 |
HARBOR INVESTMENT ADVISORY, LLC services-business services, nec | 1 | 0.01% | 0.01% | $3,000 | Oct 27, 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
3
Increased
+1.8K shares4
New Positions
first time holders1
Decreased
−9.0K shares4
Sold Out
fully exitedNet shares change (top 50)
7.2K
+1.8K / −9.0K
Net new holders
+2
4 new / 4 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PTIX insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
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 |
|---|---|---|---|---|---|---|---|
WRIGHT TIMOTHY R director | Mar 25, 2024 | Award | 21,250 | $1.74 | $37.0K | 21.3K | Form 4 ↗ |
Stein Robert Benjamin director | Mar 25, 2024 | Award | 75,000 | $1.74 | $130.5K | 75.0K | Form 4 ↗ |
Barrage Khalil director | Mar 25, 2024 | Award | 22,500 | $1.74 | $39.1K | 22.5K | Form 4 ↗ |
Buell Jennifer director | Mar 25, 2024 | Award | 75,000 | $1.74 | $130.5K | 75.0K | Form 4 ↗ |
ARMEN GARO H Executive Chairman | Mar 25, 2024 | Award | 250,000 | $1.74 | $435.0K | 250.0K | Form 4 ↗ |
Corvese Brian director | Mar 25, 2024 | Award | 43,750 | $1.74 | $76.1K | 43.8K | Form 4 ↗ |
Arrow Alexander K. Chief Financial Officer | Mar 25, 2024 | Award | 100,000 | $1.74 | $174.0K | 100.0K | Form 4 ↗ |
Arrow Alexander K. Chief Financial Officer | Oct 12, 2023 | Purchase | 8,000 | $0.81 | $6.5K | 45.8K | Form 4 ↗ |
Arrow Alexander K. Chief Financial Officer | May 17, 2022 | Purchase | 8,000 | $0.72 | $5.8K | 151.3K | Form 4 ↗ |
Arrow Alexander K. Chief Financial Officer | May 17, 2022 | Purchase | 23,000 | $0.71 | $16.3K | 143.3K | 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
Protagenic Therapeutics, Inc. (PTIX) is primarily owned by institutional investors, who hold approximately 5.5% of total shares outstanding. Company insiders own approximately 0.00%, while retail and public investors account for the remaining 96.19%.
The largest institutional shareholder of Protagenic Therapeutics, Inc. is DRW SECURITIES, LLC, holding approximately 36,209 shares — equal to 1.96% of outstanding shares — as of September 30, 2025.
A total of 10 institutional investors currently hold PTIX stock, with a combined institutional value of approximately $344,382 as of the most recent 13F filing period.
Frequently asked questions
PTIX ownershipProtagenic Therapeutics, Inc. (PTIX) is primarily owned by institutional investors, who hold approximately 5.5% of shares. The largest shareholder is DRW SECURITIES, LLC with a 1.96% stake. Company insiders hold 0.00%. Data sourced from SEC Form 13F as of September 30, 2025.