Whale Tracker

NEUTRAL — WATCH

No clear whale direction for STX. Bullish and bearish signals roughly cancel out. Insiders are net sellers (205,463 shares sold vs 112,215 bought) — management reducing exposure. Strong institutional ownership at 88.7% with 6 of 10 top holders actively accumulating this quarter.

Action Plan

Hold existing positions — no strong directional signal
Wait for clearer whale activity before adding
Monitor next earnings for institutional positioning changes

📈 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)

1.11

NEUTRAL

CALL VOLUME

6,134

PUT VOLUME

6,787

TOTAL VOLUME

12,921

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$8052026-05-29225456.2x

PUT$6202026-06-055251243.8x

PUT$6602026-06-26111522.2x

CALL$6422026-05-2218118.0x

CALL$12502026-05-2917117.0x

CALL$9852026-05-2233216.5x

PUT$6682026-05-2216116.0x

PUT$8002026-05-292371614.8x

CALL$7652026-06-1287614.5x

PUT$6582026-05-2257414.2x

High Volume Contracts — Vol > 500 (2 contracts)

TypeStrikeExpiryVolume

CALL$10502026-05-22619

PUT$6202026-06-05525

P/C OI RATIO

0.83

TOTAL OI

68,672

CALL OI

37,434

PUT OI

31,238

Put/Call volume ratio: 1.11 (bearish)
Total options volume: 12,921 (calls 6,134 / puts 6,787)
Top unusual: PUT $805.0 exp 2026-05-29 — vol/OI 56.2x
30 unusual strikes detected (17C / 13P)

👤 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)

112,215

SHARES SOLD (6m)

205,463

NET INSIDER FLOW

-93,248

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

SELLTEH BAN-SENG15,5602026-05-14

SELLROMANO GIANLUCA1,9022026-05-07

SELLROMANO GIANLUCA22,4882026-05-06

SELLTILENIUS STEPHANIE SCHEAR1,5802026-05-05

SELLMORRIS JOHN CHRISTOPHER5,6262026-05-04

SELLLEE JAMES CI6972026-05-04

SELLMOSLEY WILLIAM D20,0002026-04-01

SELLMOSLEY WILLIAM D24,5842026-03-19

SELLMORRIS JOHN CHRISTOPHER1122026-03-13

Insider buying: 112,215 shares
Insider selling: 205,463 shares
28 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

88.7%

ACCUMULATION vs DISTRIBUTION

60% ACCUMULATING

40% DISTRIBUTING

NET SHARES FLOW

+12,399,227

FLOW SCORE

+0.26

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 POSITIONDz Bank Ag Deutsche Zentral Genossenschafts B2.42%NEW+4,426,485

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

▲ ADDINGMorgan Stanley2.37%+5.1%+258,033

▲ ADDINGGeode Capital Management, LLC2.18%+5.0%+234,513

▬ HOLDState Street Corporation4.18%+1.0%+94,617

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

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

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

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

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar+0.1%+5,360

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+4.7%+245,093

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

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F-1.2%-55,979

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

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.9%+25,827

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.4%+12,200

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +3.0%+77,047

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Growth -1.9%-34,413

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

Institutional ownership: 88.7%
Smart money flow: 6 adding / 2 selling / 2 hold
Net shares added by institutions: +12,399,227
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

4.4%

DAYS TO COVER

2.1

SI CHANGE (MoM)

↓ 5.7%

SQUEEZE RISK

MINIMAL

SHARES SHORT

8,618,343

PRIOR MONTH

9,144,048

FLOAT SHARES

223,518,186

AVG VOLUME

3,951,706

Short interest: 4.4% of float
Days to cover: 2.1
Short interest MoM: ↓ 5.7%
Squeeze risk: MINIMAL

📡 Data Sources 数据来源

Options Flow

NEUTRAL (80%)

Insider Trading

NEUTRAL (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

BULLISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 4.4% of float
[dark_pool] Days to cover: 2.1
[institutional] Institutional ownership: 88.7%
[institutional] Smart money flow: 6 adding / 2 selling / 2 hold
[options_flow] Put/Call volume ratio: 1.11 (bearish)
[options_flow] Total options volume: 12,921 (calls 6,134 / puts 6,787)
[insider] Insider buying: 112,215 shares
[insider] Insider selling: 205,463 shares