Whale Tracker

NEUTRAL — WATCH

No clear whale direction for WDC. Bullish and bearish signals roughly cancel out. Insiders are net sellers (171,021 shares sold vs 23,145 bought) — management reducing exposure. Strong institutional ownership at 106.1%, but 2 of 10 top holders are distributing.

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)

0.87

NEUTRAL

CALL VOLUME

18,869

PUT VOLUME

16,478

TOTAL VOLUME

35,347

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$4682026-05-15177359.0x

PUT$2702026-06-1257157.0x

PUT$3622026-05-2246146.0x

CALL$5122026-05-1574237.0x

CALL$7002026-06-1257228.5x

CALL$6002026-05-154,87922721.5x

PUT$3422026-05-2262320.7x

CALL$6502026-06-0560320.0x

PUT$6302026-06-1820120.0x

PUT$4552026-06-1218118.0x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$6002026-05-154,879

CALL$5002026-05-151,341

PUT$4102026-05-151,158

CALL$6002026-06-181,148

CALL$4002026-06-181,114

PUT$3702026-05-22870

PUT$4182026-05-15777

CALL$4802026-05-15750

CALL$5502026-05-15516

CALL$4752026-05-15506

P/C OI RATIO

1.02

TOTAL OI

164,200

CALL OI

81,125

PUT OI

83,075

Put/Call volume ratio: 0.87 (bullish)
Total options volume: 35,347 (calls 18,869 / puts 16,478)
Top unusual: PUT $467.5 exp 2026-05-15 — vol/OI 59.0x
40 unusual strikes detected (19C / 21P)

👤 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.

12% BUY

88% SELL

SHARES BOUGHT (6m)

23,145

SHARES SOLD (6m)

171,021

NET INSIDER FLOW

-147,876

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

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: 171,021 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

106.1%

ACCUMULATION vs DISTRIBUTION

20% ACCUMULATING

80% DISTRIBUTING

NET SHARES FLOW

-9,812,742

FLOW SCORE

+0.05

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

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

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

▬ HOLDBlackrock Inc.10.30%+2.3%+794,963

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

▬ HOLDWCM Investment Management, LLC1.90%-1.9%-129,135

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

▬ HOLDAmeriprise Financial, Inc.2.47%-1.9%-163,253

▬ HOLDVanguard Group Inc12.29%-2.2%-934,925

▼▼ HEAVY SELLJPMORGAN CHASE & CO4.15%-40.5%-9,742,987

▼▼ 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 -2.5%-100,290

★ 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: 106.1%
Smart money flow: 2 adding / 2 selling / 6 hold
Net shares removed by institutions: -9,812,742
Biggest mover: Bank of America Corporation sold 10,318,236 shares (-46.1%)

🕶 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

8.9%

DAYS TO COVER

3.1

SI CHANGE (MoM)

↓ 2.9%

SQUEEZE RISK

LOW

SHARES SHORT

26,758,181

PRIOR MONTH

27,567,965

FLOAT SHARES

342,296,931

AVG VOLUME

8,698,719

Short interest: 8.9% of float
Days to cover: 3.1
Short interest MoM: ↓ 2.9%
Squeeze risk: LOW

📡 Data Sources 数据来源

Options Flow

NEUTRAL (80%)

Insider Trading

BEARISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

NEUTRAL (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 8.9% of float
[dark_pool] Days to cover: 3.1
[institutional] Institutional ownership: 106.1%
[institutional] Smart money flow: 2 adding / 2 selling / 6 hold
[options_flow] Put/Call volume ratio: 0.87 (bullish)
[options_flow] Total options volume: 35,347 (calls 18,869 / puts 16,478)
[insider] Insider buying: 23,145 shares
[insider] Insider selling: 171,021 shares