SEC ownership of Data Storage Corp

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001419951.

Comparable stake leader

ANGELES WEALTH MANAGEMENT, LLC

Disclosed value leader

Charles M. Piluso

Comparable rows

14/33

Latest evidence

21 May 2026

Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 2 signals
Comparable ownership rows
14 of 33
Meaning: Rows with safely comparable ownership %
Latest parsed ownership date
21 May 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0001419951
Issuer location
New York, NY

Ownership snapshot

Top shareholders of Data Storage Corp (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
ANGELES WEALTH MANAGEMENT...
Disclosed value leader
Charles M. Piluso
Comparable rows
14/33
Latest evidence
21 May 2026
13F 3/4/5 Lead comparable stake: 0.29% 19 rows are not safely comparable across share classes. Showing 1-8 of 33 holder rows.

Quick read

ANGELES WEALTH MANAGEMENT, LLC leads the comparable SEC ownership view at 0.29%.

14 of 33 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 ANGELES WEALTH MANAGEMENT, LLC's linked filing trail.
Comparable ownership Top 5
ANGELES WEALTH MANAGEMENT, LLC 0.29%
GEODE CAPITAL MANAGEMENT, LLC 0.25%
VANGUARD CAPITAL MANAGEMENT LLC 0.21%
CITADEL ADVISORS LLC 0.15%
MILLENNIUM MANAGEMENT LLC 0.15%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 33 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
ANGELES WEALTH MANAGEMENT, LLC
13F
Company
13F
0.29%
$166,797
43,100 shares
31 Mar 2026
GEODE CAPITAL MANAGEMENT, LLC
13F
Company
13F
0.25%
$148,050
38,247 shares
31 Mar 2026
VANGUARD CAPITAL MANAGEMENT LLC
13F
Company
13F
0.21%
$121,065
31,283 shares
31 Mar 2026
CITADEL ADVISORS LLC
13F
Company
13F
0.15%
$88,847
22,958 shares
31 Mar 2026
MILLENNIUM MANAGEMENT LLC
13F
Company
13F
0.15%
$85,039
21,974 shares
31 Mar 2026
Focus Partners Wealth
13F
Company
13F
0.12%
$68,998
17,829 shares
31 Mar 2026
Centiva Capital, LP
13F
Company
13F
0.11%
$62,601
16,176 shares
31 Mar 2026
XTX Topco Ltd
13F
Company
13F
0.09%
$50,863
13,143 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

Net insider flow leans to selling over the last 12 months. Net value: -$682,719.

Buys
$0
Insiders: 0
Sells
$682,719
Insiders: 5
Net
-$682,719
Shares: -156,946
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 156,946
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 86,958 $0 $333,310 -$333,310
3-6 0 0 $0 $0 $0
6-9 0 69,988 $0 $349,410 -$349,410
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-13 of 13 reporting-owner rows connected to Data Storage Corp. Open a relationship link for the CIK-to-CIK filing trail.

Rows
13
Largest Forms 3/4/5 holder
Charles M. Piluso
Net 12M change
-$682,719
Latest report
21 May 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Charles M. Piluso Chairman and CEO, Director, 10%+ Owner $889,691 -$433,622 -33% Mixed 21 May 2026
Mark Alexander Wyllie Executive Vice President, Director $204,000 Mixed 17 May 2022
Harold J. Schwartz Director $177,635 Mixed 29 Jan 2026
Todd A. Correll Director $166,358 -$51,936 -24% Filing P/S 29 Jan 2026
Thomas Kempster Director $27,086 -$34,185 -56% Mixed 29 Jan 2026
Joseph B. Hoffman Director $25,500 Mixed 30 Sep 2023
Christos Panagiotakos Chief Financial Officer $18,775 -$55,192 -75% Mixed 13 Feb 2026
Matthew Grover Director $0 Mixed 29 Jan 2026
Clifford Stein Director $0 Mixed 29 Jan 2026
Lawrence A. Maglione Director $0 -$107,784 -100% Mixed 29 Jan 2026
Nancy M. Stallone Director $0 Mixed 29 Jan 2026
John Argen Director $0 Mixed 29 Jan 2026
Uwayne A. Mitchell Director $0 Mixed 29 Jan 2026

Recent insider transactions for Data Storage Corp

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
Charles M. Piluso DTST Common Stock Sale -12.8% $124,570 $3.82 -32,610 223,074 26 May 2026 Direct
Charles M. Piluso DTST Common Stock Sale -14% $159,649 $3.82 -41,793 255,684 22 May 2026 Direct
Charles M. Piluso DTST Common Stock Sale -4.05% $49,090 $3.91 -12,555 297,477 21 May 2026 Direct
Christos Panagiotakos DTST Common Stock Award 148.1% 60,000 100,507 13 Feb 2026 Direct
Christos Panagiotakos DTST Stock Options Award 125,000 125,000 13 Feb 2026 Direct
Charles M. Piluso DTST Common Stock Award 24% 60,000 310,032 13 Feb 2026 Direct
Charles M. Piluso DTST Stock Options Award 250,000 250,000 13 Feb 2026 Direct
Charles M. Piluso DTST Common Stock Award 179.6% 160,600 250,032 09 Feb 2026 Direct
Harold J. Schwartz DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Matthew Grover DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Todd A. Correll DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Lawrence A. Maglione DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Uwayne A. Mitchell DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
John Argen DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Thomas Kempster DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Clifford Stein DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
Nancy M. Stallone DTST Restricted Stock Unit Award 10,000 10,000 29 Jan 2026 Direct
John Argen DTST Common Stock Disposed to Issuer -100% -57,207 0 14 Jan 2026 Direct
Harold J. Schwartz DTST Common Stock Disposed to Issuer -100% -7,500 0 14 Jan 2026 Systems Trading, Inc.
Harold J. Schwartz DTST Common Stock Disposed to Issuer -96.9% -888,376 28,471 14 Jan 2026 Direct
Clifford Stein DTST Common Stock Disposed to Issuer -100% -280,850 0 14 Jan 2026 Direct
Lawrence A. Maglione DTST Common Stock Disposed to Issuer -100% -24,752 0 14 Jan 2026 Direct
Uwayne A. Mitchell DTST Common Stock Disposed to Issuer -100% -11,248 0 14 Jan 2026 Direct
Nancy Stallone DTST Common Stock Disposed to Issuer -100% -11,248 0 14 Jan 2026 Direct
Thomas Kempster DTST Common Stock Disposed to Issuer -100% -881,472 0 14 Jan 2026 Direct
Charles M. Piluso DTST Common Stock Disposed to Issuer -100% -230,116 0 14 Jan 2026 The Bella Vita 2012 Trust dated 5/4/12
Charles M. Piluso DTST Common Stock Disposed to Issuer -100% -230,116 0 14 Jan 2026 The Lasata 2012 Trust date 5/4/12
Charles M. Piluso DTST Common Stock Disposed to Issuer -100% -65,083 0 14 Jan 2026 Piluso Family Associates LLC
Charles M. Piluso DTST Common Stock Disposed to Issuer -100% -16,667 0 14 Jan 2026 Piluso Family Associates
Charles M. Piluso DTST Common Stock Disposed to Issuer -78.4% -323,859 89,432 14 Jan 2026 Direct
Matthew Grover DTST Common Stock Disposed to Issuer -100% -43,340 0 14 Jan 2026 Direct
Harold J. Schwartz DTST Common Stock Options Exercise 4.09% 36,823 937,582 16 Dec 2025 Direct
Harold J. Schwartz DTST Stock Option Options Exercise 36,823 0 16 Dec 2025 Direct
Matthew Grover DTST Common Stock Tax liability -19% -10,202 43,340 12 Dec 2025 Direct
Lawrence A. Maglione DTST Common Stock Sale -11.8% $16,584 $5.03 -3,298 24,752 12 Dec 2025 Direct
Lawrence A. Maglione DTST Common Stock Sale -39.4% $91,200 $5.00 -18,231 28,050 11 Dec 2025 Direct
Lawrence A. Maglione DTST Common Stock Tax liability -20.1% -11,631 46,281 11 Dec 2025 Direct
Lawrence A. Maglione DTST Common Stock Options Exercise 77.4% 24,167 55,412 11 Dec 2025 Direct
Lawrence A. Maglione DTST Stock Option Options Exercise -100% -24,167 0 11 Dec 2025 Direct
Todd A. Correll DTST Common Stock Sale -23.8% $51,936 $4.96 -10,471 33,540 11 Dec 2025 Direct
Todd A. Correll DTST Common Stock Tax liability -18.8% -10,156 44,011 11 Dec 2025 Direct
Todd A. Correll DTST Common Stock Options Exercise 61.5% 20,627 54,167 11 Dec 2025 Direct
Todd A. Correll DTST Stock Option Options Exercise -100% -20,627 0 11 Dec 2025 Direct
Charles M. Piluso DTST Common Stock Sale -4.64% $100,312 $4.99 -20,089 413,291 10 Dec 2025 Direct
Thomas Kempster DTST Common Stock Sale -0.78% $34,185 $4.99 -6,846 871,972 10 Dec 2025 Direct
Christos Panagiotakos DTST Common Stock Sale -21.4% $55,192 $4.99 -11,053 40,507 10 Dec 2025 Direct
John Argen DTST Common Stock Options Exercise 33.8% 11,670 46,252 09 Oct 2025 Direct
John Argen DTST Option to Purchase Stock Options Exercise -100% -11,670 0 09 Oct 2025 Direct
Harold J. Schwartz DTST Common Stock Options Exercise 1.49% 13,236 900,759 11 Sep 2025 Direct
Harold J. Schwartz DTST Restricted Stock Unit Options Exercise -100% -13,236 0 11 Sep 2025 Direct
* marks a reported price that did not pass the local price check.
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