Vault-13

SENESTECH INC SNES

COM NEW · Common Stock · CUSIP 81720R604

17 institutional holders +2 vs Q1 2026
491,562491.6k shares reported held*
9.1% of all shares outstanding*
$726.3kreported value*
4 new 1 added 9 reduced 2 sold out net sold ≈ $196.7k (-129.9k 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: 5.4m as of 2026-08-04, 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 ≈ $1.48.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

01020Q3 24: 6Q4 24: 6Q1 25: 4Q2 25: 9Q3 25: 17Q4 25: 20Q1 26: 15Q2 26: 1717Q3 24Q1 25Q3 25Q1 26Q2 26
Numbers
QuarterHolders
Q3 20246
Q4 20246
Q1 20254
Q2 20259
Q3 202517
Q4 202520
Q1 202615
Q2 202617

Buyers vs sellers

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

Bought or addedCut or sold out
20020Q4 24: 3 bought or addedQ4 24: 3 cut or sold outQ4 24Q1 25: 2 bought or addedQ1 25: 2 cut or sold outQ2 25: 7 bought or addedQ2 25: 1 cut or sold outQ2 25Q3 25: 17 bought or addedQ3 25: 2 cut or sold outQ4 25: 12 bought or addedQ4 25: 9 cut or sold outQ4 25Q1 26: 8 bought or addedQ1 26: 12 cut or sold outQ2 26: 5 bought or addedQ2 26: 11 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q4 202433
Q1 202522
Q2 202571
Q3 2025172
Q4 2025129
Q1 2026812
Q2 2026511

Biggest buyers

Biggest sellers

SABBY MANAGEMENT, LLC Reduced -76,777-76.8k
RENAISSANCE TECHNOLOGIES LLC Reduced -31,384-31.4k
UBS Group AG Reduced -19,582-19.6k
GEODE CAPITAL MANAGEMENT, LLC Reduced -18,767-18.8k
JANE STREET GROUP, LLC Sold out -16,666-16.7k
TWO SIGMA SECURITIES, LLC Sold out -10,894-10.9k
XTX Topco Ltd Reduced -10,753-10.8k
VANGUARD CAPITAL MANAGEMENT LLC Reduced -8,103-8.1k
VANGUARD FIDUCIARY TRUST CO Reduced -5,100-5.1k
OSAIC HOLDINGS, INC. Reduced -4,000-4.0k

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
GLENBROOK CAPITAL MANAGEMENT 13D · may seek influence +1.9 pts · filed 2026-10-22 40.0% +1.9 pts 2.2m≈ $3.2m 2026-10-22
PFS CAP MGT CO 13G · passive investor +4.8 pts · filed 2025-08-12 10.0% +4.8 pts 340.0k≈ $506.6k 2025-08-12
LeBeau Justin Michael 13D · may seek influence new · filed 2026-10-26
Stated purposeThe Reporting Person acquired the shares of Common Stock reported herein for investment purposes because he believes the Common Stock is significantly undervalued relative to the Issuer's underlying product potential and market opportunity. The Reporting Person believes that, in order to unlock stockholder value, the Issuer's Board of Directors (the "Board") and management team should exercise greater capital discipline, reduce operating expenses, and better align management and Board compensation and incentives with the interests of common stockholders. In particular, the Reporting Person believes the Issuer should end its recurring practice of dilutive equity offerings, which he believes have eroded stockholder value. The Reporting Person has reviewed the public letter sent to the Chai… Full filing
5.4% new 294.8k≈ $439.2k 2026-10-26

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
202Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 2 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 1 buyingQ2 26: 0 sellingQ3 26: 1 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—2$171—
Q1 20260—0——
Q2 20261$6.6k0——
Q3 20261$6.5k0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-09-28 Edell Michael Chief Executive Officer, director Bought 2,000 $0.64 $1.3k2.0k shares +22%
2026-09-14 Edell Michael Chief Executive Officer, director Bought 1,000 $0.84 $8401.0k shares +12%
2026-09-09 Edell Michael Chief Executive Officer, director Bought 2,000 $0.87 $1.7k2.0k shares +33%
2026-08-14 Edell Michael Chief Executive Officer, director Bought 1,000 $1.21 $1.2k1.0k shares +20%
2026-08-07 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 6,490 $1.30 $8.4k6.5k shares +1%
2026-08-06 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 15,000 $1.30 $19.5k15.0k shares +1%
2026-07-20 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 35,000 $1.47 $51.5k35.0k shares +3%
2026-07-07 Edell Michael Chief Executive Officer, director Bought 1,000 $1.43 $1.4k1.0k shares +25%
2026-06-30 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 35,000 $1.51 $52.9k35.0k shares +4%
2026-06-29 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 5,172 $1.52 $7.9k5.2k shares +0%
2026-06-26 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 6,812 $1.56 $10.6k6.8k shares +1%
2026-06-25 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 9,442 $1.53 $14.4k9.4k shares +1%
2026-06-24 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 3,990 $1.55 $6.2k4.0k shares +<1%
2026-06-22 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 5,000 $1.66 $8.3k5.0k shares +0%
2026-06-17 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 3,264 $1.61 $5.3k3.3k shares +<1%
2026-06-08 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 7,000 $1.61 $11.3k7.0k shares +1%
2026-06-08 Edell Michael Chief Executive Officer, director Bought 1,000 $1.55 $1.6k1.0k shares +33%
2026-06-05 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 13,159 $1.57 $20.7k13.2k shares +1%
2026-06-04 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 8,230 $1.65 $13.6k8.2k shares +1%
2026-05-18 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 10,000 $1.59 $15.9k10.0k shares +1%
2026-05-15 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 7,120 $1.65 $11.7k7.1k shares +1%
2026-05-15 Edell Michael Chief Executive Officer, director Bought 1,000 $1.62 $1.6k1.0k shares +50%
2026-05-14 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 15,000 $1.72 $25.8k15.0k shares +2%
2026-05-14 Edell Michael Chief Executive Officer, director Bought 2,000 $1.70 $3.4k2.0k shares new
2026-04-28 GLENBROOK CAPITAL MANAGEMENT 10% owner · See footnote Bought 3,000 $1.47 $4.4k3.0k shares +<1%

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 SABBY MANAGEMENT, LLC 1.76% of their portfolio MIAMI BEACH, FL 141,756141.8k $211.2k $211.2k 1.76% Reduced -76.8k -76,777
2 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 82,61682.6k $123.1k $123.1k 0.00% Reduced -31.4k -31,384
3 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 46,67146.7k $69.5k $69.5k 0.00% Added +35.4k +35,352
4 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 44,33944.3k $66.1k $66.1k 0.00% Reduced -18.8k -18,767
5 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 34,76234.8k $51.8k $51.8k 0.00% Reduced -8.1k -8,103
6 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 26,59426.6k $39.6k $39.6k 0.00% Reduced -5.1k -5,100
7 ESSEX INVESTMENT MANAGEMENT CO LLC 0.01% of their portfolio BOSTON, MA 26,20326.2k $39.0k $39.0k 0.01% Reduced -91 -91
8 Diversify Advisory Services, LLC 0.00% of their portfolio SANDY, UT 19,11919.1k $25.4k $25.4k 0.00% New
9 DIVERSIFY WEALTH MANAGEMENT, LLC 0.00% of their portfolio SANDY, UT 19,11919.1k $25.4k $25.4k 0.00% Unchanged
10 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 17,58717.6k $26.2k $26.2k 0.00% New
11 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 16,66216.7k $24.8k $24.8k 0.00% Unchanged
12 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 10,30810.3k $15.4k $15.4k 0.00% Reduced -10.8k -10,753
13 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 3,4003.4k $5.1k $5.1k 0.00% Unchanged
14 UBS Group AG 0.00% of their portfolio ZURICH, V8 1,3071.3k $1.9k $1.9k 0.00% Reduced -19.6k -19,582
15 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1,0001.0k $1.5k $1.5k 0.00% Reduced -4.0k -4,000
16 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 106106 $158 $158 0.00% New
17 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 1313 $19 $19 0.00% New