Holder evidence
19
SEC ownership of Castor Maritime Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001720161.
Largest current holder
TOWERVIEW LLC
13D/G signal
—
Latest evidence
31 Mar 2026
- Symbol
- CTRM on Nasdaq
- Ownership evidence mix
- 13F and 3/4/5
- Largest current holder
- TOWERVIEW LLC
- Latest evidence date
- 31 Mar 2026
- CIK
- 0001720161
- Location
- Limassol, Cyprus
Ownership snapshot
1 fact
Issuer identity
2 facts
Ownership snapshot
Top shareholders of Castor Maritime Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Largest current holder
TOWERVIEW LLC
13D/G signal
—
Evidence rows
19
Latest as of
31 Mar 2026
13F
3/4/5
Highest disclosed value: $444,000
Showing 1-8 of 19 holder rows.
Quick read
TOWERVIEW LLC has the largest disclosed position value at $444K.
Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Disclosed position value
Top 5
TOWERVIEW LLC
$444K
RENAISSANCE TECHNOLOGIES LLC
$136.7K
GOLDMAN SACHS GROUP INC
$39K
Apriem Advisors
$35.2K
Petros Panagiotis Panagiotidis
$23.7K
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 19 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| TOWERVIEW LLC |
13F
Company
|
—
class O/S missing
|
$444,000
240,000 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
—
class O/S missing
|
$136,658
73,869 shares
|
— | 31 Mar 2026 |
| GOLDMAN SACHS GROUP INC |
13F
Company
|
—
class O/S missing
|
$39,000
21,081 shares
|
— | 31 Mar 2026 |
| Apriem Advisors |
13F
Company
|
—
class O/S missing
|
$35,150
19,000 shares
|
— | 31 Mar 2026 |
| Petros Panagiotis Panagiotidis |
3/4/5
Chairman, Chief Executive Officer and Chief Financial Officer, Director
|
—
mixed-class rows
|
$23,716
23,240 shares
mixed-class rows
|
— | 18 Mar 2026 |
| Centiva Capital, LP |
13F
Company
|
—
class O/S missing
|
$20,515
11,089 shares
|
— | 31 Mar 2026 |
| SIMPLEX TRADING, LLC |
13F
Company
|
—
class O/S missing
|
$10,874
5,878 shares
|
— | 31 Mar 2026 |
| UBS Group AG |
13F
Company
|
—
class O/S missing
|
$4,120
2,227 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 01 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-3 of 3 reporting-owner rows connected to Castor Maritime Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
3
Largest current holder
Petros Panagiotis Panagiotidis
Net 12M change
$0
Latest report
18 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Petros Panagiotis Panagiotidis | Chairman, Chief Executive Officer and Chief Financial Officer, Director | $23,716 | Mixed | 18 Mar 2026 | ||
| Angelos Rounick Platanias | Director | Mixed | 18 Mar 2026 | |||
| Dionysios Makris | Director | Mixed | 18 Mar 2026 |
Recent insider transactions for Castor Maritime Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Petros Panagiotis Panagiotidis | CTRM | Series B Preferred Shares | 0 | 12,000 | 18 Mar 2026 | By Thalassa Investment Co. S.A. | ||||
| Petros Panagiotis Panagiotidis | CTRM | Common Shares | 0 | 11,240 | 18 Mar 2026 | By Thalassa Investment Co. S.A. |
* marks a reported price that did not pass the local price check.