Whale Tracker

LEAN BEARISH

Whales showing caution on WDC. Distribution signals outweigh accumulation. Insiders are net sellers (181,021 shares sold vs 23,145 bought) — management reducing exposure. Strong institutional ownership at 101.5% with 6 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)

1.55

BEARISH

CALL VOLUME

8,802

PUT VOLUME

13,630

TOTAL VOLUME

22,432

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (7C / 3P)

TypeStrikeExpiryVolOIRatio

CALL$7302026-06-1280180.0x

CALL$4582026-05-2940140.0x

CALL$6702026-06-183021915.9x

CALL$5652026-05-2212112.0x

CALL$6702026-06-0520210.0x

PUT$6102026-06-1820210.0x

CALL$4802026-05-229171267.3x

PUT$1602026-05-22188277.0x

CALL$6052026-05-22616.0x

PUT$1652026-05-22301575.3x

High Volume Contracts — Vol > 500 (6 contracts)

TypeStrikeExpiryVolume

PUT$4202026-05-22970

CALL$4802026-05-22917

CALL$5002026-05-22733

CALL$6002026-05-22712

PUT$3502026-06-18706

PUT$2602026-06-05505

P/C OI RATIO

1.16

TOTAL OI

150,062

CALL OI

69,440

PUT OI

80,622

Put/Call volume ratio: 1.55 (bearish)
Total options volume: 22,432 (calls 8,802 / puts 13,630)
Top unusual: CALL $730.0 exp 2026-06-12 — vol/OI 80.0x
19 unusual strikes detected (12C / 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.

11% BUY

89% SELL

SHARES BOUGHT (6m)

23,145

SHARES SOLD (6m)

181,021

NET INSIDER FLOW

-157,876

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

SELLDAVIS BRIAN SCOTT10,0002026-05-11

SELLGUBBI VIDYADHARA K4,6742026-05-04

SELLTAN IRVING20,0002026-05-01

SELLTREGILLIS CYNTHIA LOCK3632026-04-21

SELLGUBBI VIDYADHARA K8,5182026-03-06

SELLGUBBI VIDYADHARA K10,1482026-03-04

SELLTREGILLIS CYNTHIA LOCK9,3242026-03-04

SELLCOLE MARTIN I6,0002026-03-02

SELLTREGILLIS CYNTHIA LOCK2142026-02-26

Insider buying: 23,145 shares
Insider selling: 181,021 shares
36 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

101.5%

ACCUMULATION vs DISTRIBUTION

60% ACCUMULATING

40% DISTRIBUTING

NET SHARES FLOW

+34,258,522

FLOW SCORE

+0.47

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONVanguard Capital Management LLC6.39%NEW+11,017,430

★ NEW POSITIONCapital World Investors3.45%NEW+10,816,433

★ NEW POSITIONVanguard Portfolio Management LLC4.98%NEW+8,586,326

▲▲ HEAVY BUYFMR, LLC9.80%+42.2%+10,037,174

▲▲ HEAVY BUYJPMORGAN CHASE & CO5.08%+22.5%+3,216,516

▲ ADDINGMorgan Stanley2.60%+6.5%+541,973

▬ HOLDBlackrock Inc.10.38%+0.7%+259,222

▬ HOLDState Street Corporation4.55%+1.5%+233,483

▬ HOLDGeode Capital Management, LLC2.69%-1.4%-131,799

▼▼ HEAVY SELLBank of America Corporation3.49%-46.1%-10,318,236

ETF & Mutual Fund Flow (2 adding / 1 selling)

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar-1.7%-182,496

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+0.7%+61,634

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F-3.0%-231,734

▬ HOLDInvesco QQQ Trust, Series 1+1.6%+114,276

▬ HOLDiShares Trust-iShares Core S&P 500 ETF0.0%0

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In-0.5%-21,320

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +3.0%+119,394

★ NEW POSIAMERICAN BALANCED FUNDNEW+1,899,937

★ NEW POSIJPMorgan Trust II-JPMorgan Large Cap Growth FNEW+1,841,308

▼▼ HEAVY SEColumbia Fd.s Series TRT II-Columbia Seligman-28.2%-1,345,968

Institutional ownership: 101.5%
Smart money flow: 6 adding / 1 selling / 3 hold
Net shares added by institutions: +34,258,522
Biggest mover: Vanguard Capital Management LLC added 11,017,430 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

9.5%

DAYS TO COVER

3.9

SI CHANGE (MoM)

↑ 9.3%

SQUEEZE RISK

LOW

SHARES SHORT

29,140,914

PRIOR MONTH

26,653,778

FLOAT SHARES

342,307,271

AVG VOLUME

8,426,395

Short interest: 9.5% of float
Days to cover: 3.9
Short interest MoM: ↑ 9.3%
Squeeze risk: LOW

📡 Data Sources 数据来源

Options Flow

BEARISH (80%)

Insider Trading

BEARISH (90%)

Smart Money Flow

BULLISH (75%)

Short Interest

LEAN BEARISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 9.5% of float
[dark_pool] Days to cover: 3.9
[institutional] Institutional ownership: 101.5%
[institutional] Smart money flow: 6 adding / 1 selling / 3 hold
[options_flow] Put/Call volume ratio: 1.55 (bearish)
[options_flow] Total options volume: 22,432 (calls 8,802 / puts 13,630)
[insider] Insider buying: 23,145 shares
[insider] Insider selling: 181,021 shares