Vault-13

DATA STORAGE CORP DTST

COM NEW · Common Stock · CUSIP 23786R201

17 institutional holders +1 vs Q1 2026
147,369147.4k shares reported held*
6.3% of all shares outstanding*
$508.6kreported value*
4 new 2 added 5 reduced 3 sold out net sold ≈ $224.8k (-65.2k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 2.3m as of 2026-08-13, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $3.45.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

02040Q3 22: 11Q4 22: 15Q1 23: 10Q2 23: 12Q3 23: 12Q4 23: 15Q1 24: 15Q2 24: 20Q3 24: 21Q4 24: 25Q1 25: 21Q2 25: 22Q3 25: 23Q4 25: 35Q1 26: 16Q2 26: 1717Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202211
Q4 202215
Q1 202310
Q2 202312
Q3 202312
Q4 202315
Q1 202415
Q2 202420
Q3 202421
Q4 202425
Q1 202521
Q2 202522
Q3 202523
Q4 202535
Q1 202616
Q2 202617

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q3 24: 9 bought or addedQ3 24: 11 cut or sold outQ4 24: 13 bought or addedQ4 24: 11 cut or sold outQ4 24Q1 25: 5 bought or addedQ1 25: 10 cut or sold outQ2 25: 11 bought or addedQ2 25: 6 cut or sold outQ2 25Q3 25: 10 bought or addedQ3 25: 11 cut or sold outQ4 25: 23 bought or addedQ4 25: 9 cut or sold outQ4 25Q1 26: 3 bought or addedQ1 26: 29 cut or sold outQ2 26: 6 bought or addedQ2 26: 8 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 2024911
Q4 20241311
Q1 2025510
Q2 2025116
Q3 20251011
Q4 2025239
Q1 2026329
Q2 202668

Biggest buyers

HRT FINANCIAL LP New +10,901+10.9k
UBS Group AG New +5,279+5.3k
ROYAL BANK OF CANADA Added +1,355+1.4k
CITADEL ADVISORS LLC Added +666+666
BESSEMER GROUP INC New +150+150
BARCLAYS PLC New +5+5

Biggest sellers

VANGUARD CAPITAL MANAGEMENT LLC Reduced -23,118-23.1k
GEODE CAPITAL MANAGEMENT, LLC Reduced -19,305-19.3k
Centiva Capital, LP Sold out -16,176-16.2k
XTX Topco Ltd Sold out -13,143-13.1k
MILLENNIUM MANAGEMENT LLC Reduced -9,285-9.3k
Tower Research Capital LLC (TRC) Reduced -1,447-1.4k
OSAIC HOLDINGS, INC. Reduced -780-780
MORGAN STANLEY Sold out -268-268

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
ARMISTICE CAPITAL, LLC 13G · institution +2.7 pts · filed 2026-02-17 10.0% +2.7 pts 1.5m≈ $886.3k 2026-02-17

Fell to 5% or below in the last year: BARD ASSOCIATES INC (0.0%, 2026-02-04)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
505Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 4 sellingQ1 25Q2 25: 0 buyingQ2 25: 2 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 5 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 1 sellingQ3 26: 0 buyingQ3 26: 4 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—4$69.9k$44.8k
Q2 20250—2$7.6k$7.6k
Q3 20250—0——
Q4 20250—5$349.3k—
Q1 20260—0——
Q2 20260—1$333.3k—
Q3 20260—4$40.2k—
DateInsiderTradeSharesPrice ValueTheir holding
2026-09-11 Kempster Thomas Director Sold 3,500 $2.93 $10.3k3.5k shares -16%
2026-09-11 Mitchell Uwayne A. Director Sold 3,000 $2.95 $8.8k3.0k shares -14%
2026-09-10 Stein Clifford Director Sold 3,991 $3.05 $12.2k4.0k shares -18%
2026-09-10 Argen John Director Sold 3,000 $2.97 $8.9k3.0k shares -14%
2026-05-26 Piluso Charles M. Chairman and CEO, director Sold 32,610 $3.82 $124.6k32.6k shares -13%
2026-05-22 Piluso Charles M. Chairman and CEO, director Sold 41,793 $3.82 $159.6k41.8k shares -14%
2026-05-21 Piluso Charles M. Chairman and CEO, director Sold 12,555 $3.91 $49.1k12.6k shares -4%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 ANGELES WEALTH MANAGEMENT, LLC 0.01% of their portfolio SANTA MONICA, CA 43,10043.1k $148.7k $148.7k 0.01% Unchanged
2 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 23,62423.6k $81.5k $81.5k 0.00% Added +666 +666
3 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 18,94218.9k $65.4k $65.4k 0.00% Reduced -19.3k -19,305
4 Focus Partners Wealth 0.00% of their portfolio ST LOUIS, MO 17,82917.8k $61.5k $61.5k 0.00% Unchanged
5 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 12,68912.7k $43.8k $43.8k 0.00% Reduced -9.3k -9,285
6 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 10,90110.9k $37.0k $37.0k 0.00% New
7 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 8,1658.2k $28.2k $28.2k 0.00% Reduced -23.1k -23,118
8 UBS Group AG 0.00% of their portfolio ZURICH, V8 5,2795.3k $18.2k $18.2k 0.00% New
9 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 4,8344.8k $16.7k $16.7k 0.00% Unchanged
10 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 1,3791.4k $5.0k $5.0k 0.00% Added +1.4k +1,355
11 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 300300 $1.0k $1.0k 0.00% Reduced -780 -780
12 BESSEMER GROUP INC 0.00% of their portfolio WOODBRIDGE, NJ 150150 $1.0k $1.0k 0.00% New
13 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 100100 $345 $345 0.00% Unchanged
14 BlackRock, Inc. 0.00% of their portfolio New York, NY 6969 $238 $238 0.00% Unchanged
15 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 55 $17 $17 0.00% New
16 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 33 $10 $10 0.00% Reduced -1.4k -1,447
17 FMR LLC 0.00% of their portfolio BOSTON, MA 00 $1 $1 0.00% Unchanged