Comparable stake leader
ALLIANCEBERNSTEIN L.P.
SEC ownership of ECB Bancorp, Inc. /MD/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001914605.
Disclosed value leader
ALLIANCEBERNSTEIN L.P.
Comparable rows
0/50
Latest evidence
30 Jun 2026
- Public ticker
- ECBK on Nasdaq
- Parsed ownership sources
-
13F and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
ALLIANCEBERNSTEIN L.P.
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001914605
- Issuer location
- Everett, MA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
1 signal
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of ECB Bancorp, Inc. /MD/ (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.
Comparable stake leader
ALLIANCEBERNSTEIN L.P.
Disclosed value leader
ALLIANCEBERNSTEIN L.P.
Comparable rows
0/50
Latest evidence
30 Jun 2026
13F
3/4/5
Highest disclosed value: $12,621,614
50 rows are not safely comparable across share classes.
Showing 1-8 of 50 holder rows.
Quick read
ALLIANCEBERNSTEIN L.P. has the largest disclosed position value at $12.62M.
0 of 50 rows have a safely comparable ownership percentage. 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.
Open SEC evidence
Opens ALLIANCEBERNSTEIN L.P.'s linked filing trail.
Disclosed position value
Top 5
ALLIANCEBERNSTEIN L.P.
$12.62M
BlackRock, Inc.
$8.4M
VANGUARD CAPITAL MANAGEMENT LLC
$6.79M
Richard J. O'Neil Jr.
$4.81M
GEODE CAPITAL MANAGEMENT, LLC
$3.53M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ALLIANCEBERNSTEIN L.P. |
13F
Company
|
—
denominator unverified
|
$12,621,614
754,430 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$8,401,191
418,386 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$6,785,875
337,942 shares
|
— | 30 Jun 2026 |
| Richard J. O'Neil Jr. |
3/4/5
President and CEO, Director
|
—
mixed-class rows
|
$4,809,656
282,669 shares
mixed-class rows
|
— | 16 Sep 2025 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
—
denominator unverified
|
$3,527,855
175,662 shares
|
— | 30 Jun 2026 |
| Brandon Lavertu |
3/4/5
CFO
|
—
mixed-class rows
|
$3,209,815
188,167 shares
mixed-class rows
|
+$716 | 30 Apr 2026 |
| Sachetta, LLC |
13F
Company
|
—
denominator unverified
|
$2,386,569
118,853 shares
|
— | 30 Jun 2026 |
| John A. Citrano |
3/4/5
EVP and COO
|
—
mixed-class rows
|
$1,858,740
317,111 shares
mixed-class rows
|
— | 12 Feb 2025 |
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
Net insider flow leans to buying over the last 12 months. Net value: +$100,392.
Buys
$100,392
Insiders: 2
Sells
$0
Insiders: 0
Net
+$100,392
Shares: +5,740
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 5,740
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 | 2,240 | 0 | $41,416 | $0 | +$41,416 |
| 9-12 | 3,500 | 0 | $58,977 | $0 | +$58,977 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to ECB Bancorp, Inc. /MD/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Richard J. O'Neil Jr.
Net 12M change
+$100.39K
Full value: +$100,393 · USD · 12-month changeLatest report
16 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Richard J. O'Neil Jr. | President and CEO, Director | $4,809,656 | Mixed | 16 Sep 2025 | ||
| Brandon Lavertu | Cfo | $3,209,815 | +$716 | +0.02% | Mixed | 30 Apr 2026 |
| John A. Citrano | EVP and COO | $1,858,740 | Mixed | 12 Feb 2025 | ||
| Joseph Sachetta | Director | $1,202,778 | Mixed | 18 Dec 2024 | ||
| John Migliozzi | EVP and CLO | $922,556 | Mixed | 31 Oct 2023 | ||
| Dennis J. Leonard | Director, Chairman of the Board | $677,687 | Mixed | 08 Sep 2023 | ||
| Elizabeth P. Jones | Director | $512,837 | Mixed | 08 Sep 2023 | ||
| Susan Sgroi | Director | $402,937 | Mixed | 08 Sep 2023 | ||
| Paul A. Delory | Director | $286,555 | Mixed | 03 May 2024 | ||
| Marjorie A. White | Director | $238,087 | Mixed | 08 Sep 2023 | ||
| Maura Ellen Sullivan | Director | $125,184 | +$99,677 | +391% | Mixed | 09 Feb 2026 |
| Matthew J. Cushing | Director | $0 | Mixed | 16 Sep 2026 |
Recent insider transactions for ECB Bancorp, Inc. /MD/
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Brandon Lavertu | ECBK | Common Stock | Purchase | 0.12% | $716 | $17.89 | 40 | 32,423 | 30 Apr 2026 | Direct |
| Maura Ellen Sullivan | ECBK | Common Stock | Purchase | 62.9% | $40,700 | $18.50 | 2,200 | 5,700 | 09 Feb 2026 | By Spouse |
| Maura Ellen Sullivan | ECBK | Common Stock | Award | 1,150 | 1,150 | 17 Dec 2025 | Direct | |||
| Maura Ellen Sullivan | ECBK | Common Stock | Purchase | 19.2% | $9,558 | $16.98 | 563 | 3,500 | 09 Dec 2025 | By Spouse |
| Maura Ellen Sullivan | ECBK | Common Stock | Purchase | $49,418 | $16.83 | 2,937 | 2,937 | 08 Dec 2025 | By Spouse |
* marks a reported price that did not pass the local price check.