Whale Tracker

LEAN BULLISH

Net positive whale activity for VST. Smart money shows interest, but signals are mixed. Insiders are net buyers (1,206,218 shares bought vs 176,996 sold) — bullish conviction from management. Strong institutional ownership at 91.5% 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)

0.69

LEAN BULLISH

CALL VOLUME

12,060

PUT VOLUME

8,380

TOTAL VOLUME

20,440

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$1102026-05-222,0003666.7x

PUT$952026-05-22115257.5x

PUT$1302026-06-125384811.2x

CALL$1452026-05-22568836.8x

PUT$1242026-05-222345.8x

PUT$1292026-05-223165.2x

PUT$1192026-05-221025.0x

CALL$1412026-05-291535.0x

CALL$1412026-05-22133334.0x

CALL$1402026-05-2255163.4x

High Volume Contracts — Vol > 500 (9 contracts)

TypeStrikeExpiryVolume

CALL$2152026-06-185,003

PUT$1102026-05-222,000

CALL$1602026-05-22994

PUT$1352026-06-18926

CALL$1652026-06-18760

PUT$1352026-05-22628

CALL$1452026-05-22568

PUT$1302026-06-12538

CALL$1502026-05-22514

P/C OI RATIO

0.91

TOTAL OI

148,835

CALL OI

78,108

PUT OI

70,727

Put/Call volume ratio: 0.69 (bullish)
Total options volume: 20,440 (calls 12,060 / puts 8,380)
Top unusual: PUT $110.0 exp 2026-05-22 — vol/OI 666.7x
11 unusual strikes detected (4C / 7P)

👤 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.

87% BUY

13% SELL

SHARES BOUGHT (6m)

1,206,218

SHARES SOLD (6m)

176,996

NET INSIDER FLOW

+1,029,222

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 1 sells / 9 grants)

TypeInsiderSharesDate

SELLMOORE STEPHANIE ZAPATA10,0002026-03-09

GRANTMOORE STEPHANIE ZAPATA5,3562026-03-05

GRANTHUDSON SCOTT A6,1062026-03-05

GRANTMOLDOVAN KRISTOPHER E.10,7122026-03-05

GRANTBURKE JAMES A.28,2812026-03-05

GRANTMONTEMAYOR MARGARET M.1,9892026-03-05

GRANTDORE STACEY H.12,8552026-03-05

GRANTKIRBY CARRIE LEE79,4442026-02-24

GRANTMOORE STEPHANIE ZAPATA79,4442026-02-24

GRANTHUDSON SCOTT A117,3322026-02-24

Insider buying: 1,206,218 shares
Insider selling: 176,996 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

91.5%

ACCUMULATION vs DISTRIBUTION

40% ACCUMULATING

60% DISTRIBUTING

NET SHARES FLOW

+13,940,252

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 Llc1.55%+10.9%+512,682

▬ HOLDState Street Corporation4.89%+2.7%+431,564

▬ HOLDGeode Capital Management, LLC2.66%+1.1%+97,549

▬ HOLDMorgan Stanley2.35%-1.7%-139,334

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

▼ TRIMMINGFMR, LLC5.04%-14.6%-2,898,559

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

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

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar-0.1%-14,936

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+2.2%+175,928

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F-1.6%-119,151

▬ HOLDSELECT SECTOR SPDR TRUST-State Street Utiliti-2.5%-135,104

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.8%+34,106

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+14,186

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +3.0%+112,276

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Value Index Fun+2.5%+75,455

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Growth -2.3%-66,425

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

Institutional ownership: 91.5%
Smart money flow: 4 adding / 3 selling / 3 hold
Net shares added by institutions: +13,940,252
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

4.3%

DAYS TO COVER

3.3

SI CHANGE (MoM)

↑ 33.6%

SQUEEZE RISK

MINIMAL

SHARES SHORT

12,471,471

PRIOR MONTH

9,333,104

FLOAT SHARES

314,436,139

AVG VOLUME

4,532,812

Short interest: 4.3% of float
Days to cover: 3.3
Short interest MoM: ↑ 33.6%
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: 4.3% of float
[dark_pool] Days to cover: 3.3
[institutional] Institutional ownership: 91.5%
[institutional] Smart money flow: 4 adding / 3 selling / 3 hold
[options_flow] Put/Call volume ratio: 0.69 (bullish)
[options_flow] Total options volume: 20,440 (calls 12,060 / puts 8,380)
[insider] Insider buying: 1,206,218 shares
[insider] Insider selling: 176,996 shares