Whale Tracker

LEAN BULLISH

Net positive whale activity for VST. Smart money shows interest, but signals are mixed. Insiders are net buyers (1,101,761 shares bought vs 64,102 sold) — bullish conviction from management. Strong institutional ownership at 91.2% with 4 of 10 top holders actively accumulating this quarter.

Action Plan

Consider building a position on pullbacks
Set stop-loss below key support level
Re-evaluate if insider selling accelerates

📈 Options Flow 期权异动

Unusual options volume vs open interest. High volume/OI ratio signals whale positioning. Put/Call ratio indicates directional bias.

PUT / CALL RATIO

0 (Bullish)1.02.0+ (Bearish)

0.74

LEAN BULLISH

CALL VOLUME

8,113

PUT VOLUME

6,012

TOTAL VOLUME

14,125

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (6C / 4P)

TypeStrikeExpiryVolOIRatio

CALL$1582026-06-181,0838812.3x

PUT$1722026-06-122538.3x

PUT$1852026-06-122438.0x

PUT$2002026-06-181527.5x

CALL$1522026-06-262245.5x

CALL$1952026-07-0264125.3x

CALL$1582026-06-26924.5x

CALL$1432026-06-1281194.3x

CALL$1622026-06-26414.0x

PUT$1442026-06-26414.0x

High Volume Contracts — Vol > 500 (6 contracts)

TypeStrikeExpiryVolume

CALL$1582026-06-181,083

CALL$1602026-06-18872

CALL$1552026-06-18846

PUT$1302026-07-17737

PUT$1462026-06-12555

CALL$1702026-07-17504

P/C OI RATIO

0.81

TOTAL OI

225,165

CALL OI

124,095

PUT OI

101,070

Put/Call volume ratio: 0.74 (bullish)
Total options volume: 14,125 (calls 8,113 / puts 6,012)
Top unusual: CALL $157.5 exp 2026-06-18 — vol/OI 12.3x
11 unusual strikes detected (7C / 4P)

👤 Insider Trading 内部交易

SEC Form 4 filings — officer and director buys/sells in the last 90 days. Net buying is a strong bullish signal.

95% BUY

5% SELL

SHARES BOUGHT (6m)

1,101,761

SHARES SOLD (6m)

64,102

NET INSIDER FLOW

+1,037,659

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 2 sells / 8 grants)

TypeInsiderSharesDate

SELLMONTEMAYOR MARGARET M.4,6002026-06-02

SELLMONTEMAYOR MARGARET M.5,0002026-05-27

GRANTBARBAS PAUL M1,2682026-05-15

GRANTHELM SCOTT BRADFORD2,0082026-05-15

GRANTBAIERA GAVIN R1,2682026-05-15

GRANTACOSTA ARCILIA C1,2682026-05-15

GRANTSULT JOHN R1,2682026-05-15

GRANTCRUTCHFIELD LISA1,2682026-05-15

GRANTACKERMANN HILARY E1,2682026-05-15

GRANTLAGACY JULIE A.1,2682026-05-15

Insider buying: 1,101,761 shares
Insider selling: 64,102 shares
13 Form 4 filings in last 90 days
Net insider BUYING — bullish signal

🏦 Smart Money Flow 机构资金流向

Quarter-over-quarter position changes from 13F filings. Shows whether institutional investors are accumulating (buying more) or distributing (selling) — the strongest signal of whale conviction.

INSTITUTIONAL OWNERSHIP

91.2%

ACCUMULATION vs DISTRIBUTION

40% ACCUMULATING

60% DISTRIBUTING

NET SHARES FLOW

+16,428,976

FLOW SCORE

+0.15

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONVanguard Capital Management LLC6.34%NEW+10,696,980

★ NEW POSITIONVanguard Portfolio Management LLC5.01%NEW+8,451,109

▲▲ HEAVY BUYUBS Group AG1.36%+69.7%+1,887,867

▲ ADDINGLone Pine Capital Llc1.84%+18.7%+975,670

▬ HOLDMorgan Stanley2.45%+4.3%+341,928

▬ HOLDState Street Corporation4.97%+1.8%+294,912

▬ HOLDGeode Capital Management, LLC2.68%+0.8%+68,138

▼ TRIMMINGFMR, LLC4.69%-7.0%-1,188,022

▼ TRIMMINGBlackrock Inc.8.45%-6.1%-1,843,701

▼▼ HEAVY SELLJPMORGAN CHASE & CO2.22%-30.3%-3,255,905

ETF & Mutual Fund Flow (0 adding / 1 selling)

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar+1.0%+108,670

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+0.8%+64,239

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F-0.8%-56,782

▬ HOLDSELECT SECTOR SPDR TRUST-State Street Utiliti-3.2%-173,207

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.6%+22,941

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+14,235

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +2.5%+94,569

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Value Index Fun+0.5%+16,525

▼ TRIMMINGVANGUARD INDEX FUNDS-Vanguard Mid-Cap Growth -9.1%-257,061

▬ HOLDVANGUARD WORLD FUND-Vanguard Utilities Index +2.2%+49,418

Institutional ownership: 91.2%
Smart money flow: 4 adding / 3 selling / 3 hold
Net shares added by institutions: +16,428,976
Biggest mover: Vanguard Capital Management LLC added 10,696,980 shares (+100.0%)

🕶 Short Interest & Dark Pool 做空 & 暗池

Short interest as % of float and days-to-cover. Rising SI = bearish pressure. High SI + decreasing = shorts covering (bullish). Squeeze risk rated by SI level.

SHORT INTEREST (% OF FLOAT)

0%10%20%30%+

SHORT % FLOAT

4.6%

DAYS TO COVER

2.8

SI CHANGE (MoM)

↑ 19.6%

SQUEEZE RISK

MINIMAL

SHARES SHORT

13,438,308

PRIOR MONTH

11,237,560

FLOAT SHARES

314,432,767

AVG VOLUME

4,586,511

Short interest: 4.6% of float
Days to cover: 2.8
Short interest MoM: ↑ 19.6%
Squeeze risk: MINIMAL

📡 Data Sources 数据来源

Options Flow

LEAN BULLISH (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

NEUTRAL (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 4.6% of float
[dark_pool] Days to cover: 2.8
[institutional] Institutional ownership: 91.2%
[institutional] Smart money flow: 4 adding / 3 selling / 3 hold
[options_flow] Put/Call volume ratio: 0.74 (bullish)
[options_flow] Total options volume: 14,125 (calls 8,113 / puts 6,012)
[insider] Insider buying: 1,101,761 shares
[insider] Insider selling: 64,102 shares