Whale Tracker

LEAN BEARISH

Whales showing caution on STX. Distribution signals outweigh accumulation. Insiders are net sellers (248,813 shares sold vs 131,544 bought) — management reducing exposure. Strong institutional ownership at 88.2% with 4 of 10 top holders actively accumulating this quarter.

Action Plan

Avoid new long positions until whale activity shifts
Insider selling suggests management has near-term concerns
Consider trimming if position size is large
Set alerts for insider buying or SI decrease as reversal signals

📈 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)

1.54

BEARISH

CALL VOLUME

9,238

PUT VOLUME

14,255

TOTAL VOLUME

23,493

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$8752026-06-18149274.5x

CALL$9352026-06-18192632.0x

CALL$9052026-06-1824124.0x

CALL$9422026-06-1256318.7x

PUT$8452026-06-182661517.7x

CALL$8752026-06-182231514.9x

PUT$9152026-06-122021414.4x

CALL$9352026-07-1014114.0x

CALL$9152026-06-1826213.0x

PUT$8002026-07-171,47912411.9x

High Volume Contracts — Vol > 500 (1 contracts)

TypeStrikeExpiryVolume

PUT$8002026-07-171,479

P/C OI RATIO

0.97

TOTAL OI

98,079

CALL OI

49,700

PUT OI

48,379

Put/Call volume ratio: 1.54 (bearish)
Total options volume: 23,493 (calls 9,238 / puts 14,255)
Top unusual: PUT $875.0 exp 2026-06-18 — vol/OI 74.5x
45 unusual strikes detected (23C / 22P)

👤 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.

35% BUY

65% SELL

SHARES BOUGHT (6m)

131,544

SHARES SOLD (6m)

248,813

NET INSIDER FLOW

-117,269

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 10 sells / 0 grants)

TypeInsiderSharesDate

SELLROMANO GIANLUCA1,3502026-06-10

SELLARUMUGAVELU SHANKAR1,0002026-06-04

SELLBHATT PRATIK1,0002026-06-02

SELLCONYERS YOLANDA LEE7502026-06-01

SELLMOSLEY WILLIAM D16,2202026-06-01

SELLMOSLEY WILLIAM D13,7802026-06-01

SELLMOSLEY WILLIAM D30,0002026-05-20

SELLTEH BAN-SENG15,5602026-05-14

SELLROMANO GIANLUCA1,9022026-05-07

SELLROMANO GIANLUCA22,4882026-05-06

Insider buying: 131,544 shares
Insider selling: 248,813 shares
21 Form 4 filings in last 90 days
Net insider SELLING — bearish 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

88.2%

ACCUMULATION vs DISTRIBUTION

40% ACCUMULATING

60% DISTRIBUTING

NET SHARES FLOW

+11,359,783

FLOW SCORE

+0.22

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONVanguard Capital Management LLC6.31%NEW+7,077,836

★ NEW POSITIONVanguard Portfolio Management LLC4.95%NEW+5,547,454

★ NEW POSITIONFMR, LLC3.65%NEW+4,417,242

▲▲ HEAVY BUYCapital Research Global Investors2.56%+27.1%+1,224,098

▬ HOLDGeode Capital Management, LLC2.26%+3.4%+164,042

▬ HOLDState Street Corporation4.16%-0.5%-48,725

▬ HOLDJPMORGAN CHASE & CO2.97%-4.8%-338,700

▼ TRIMMINGMorgan Stanley2.12%-10.5%-558,355

▼ TRIMMINGBlackrock Inc.6.37%-11.4%-1,842,077

▼▼ HEAVY SELLSanders Capital, LLC5.75%-24.9%-4,283,032

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

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar+3.3%+219,931

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+0.9%+49,988

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F+1.3%+61,356

▬ HOLDInvesco QQQ Trust, Series 1+1.6%+73,504

▼▼ HEAVY SEVANGUARD WINDSOR FUNDS-Vanguard Windsor II Fu-23.8%-942,268

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.6%+16,265

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+9,746

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +2.5%+64,937

▲▲ HEAVY BUVANGUARD INDEX FUNDS-Vanguard Growth Index Fu+79.8%+1,086,337

▬ HOLDVANGUARD WORLD FUND-Vanguard Information Tech+2.5%+43,143

Institutional ownership: 88.2%
Smart money flow: 4 adding / 3 selling / 3 hold
Net shares added by institutions: +11,359,783
Biggest mover: Vanguard Capital Management LLC added 7,077,836 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

2.0

SI CHANGE (MoM)

↑ 5.0%

SQUEEZE RISK

MINIMAL

SHARES SHORT

9,050,053

PRIOR MONTH

8,618,343

FLOAT SHARES

223,554,063

AVG VOLUME

3,944,619

Short interest: 4.6% of float
Days to cover: 2.0
Short interest MoM: ↑ 5.0%
Squeeze risk: MINIMAL

📡 Data Sources 数据来源

Options Flow

BEARISH (80%)

Insider Trading

NEUTRAL (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: 2.0
[institutional] Institutional ownership: 88.2%
[institutional] Smart money flow: 4 adding / 3 selling / 3 hold
[options_flow] Put/Call volume ratio: 1.54 (bearish)
[options_flow] Total options volume: 23,493 (calls 9,238 / puts 14,255)
[insider] Insider buying: 131,544 shares
[insider] Insider selling: 248,813 shares