Whale Tracker

LEAN BULLISH

Net positive whale activity for MSFT. Smart money shows interest, but signals are mixed. Insiders are net sellers (66,420 shares sold vs 13,555 bought) — management reducing exposure. Strong institutional ownership at 75.7% with 3 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)

0.22

BULLISH

CALL VOLUME

412,994

PUT VOLUME

89,542

TOTAL VOLUME

502,536

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$4282026-05-181,5477221.0x

PUT$4202026-05-189,1049694.8x

PUT$4202026-05-26303475.8x

PUT$4252026-05-185,1429057.1x

PUT$4282026-05-29114257.0x

CALL$4352026-05-1818,31538347.8x

PUT$4322026-05-2945145.0x

CALL$4222026-05-1817,56840143.8x

CALL$4552026-05-276071443.4x

PUT$4252026-05-2672236.0x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$4402026-05-2230,668

CALL$4252026-05-1823,485

CALL$4202026-05-1821,974

CALL$4302026-05-2220,771

CALL$4302026-05-1819,522

CALL$4502026-05-2218,703

CALL$4352026-05-1818,315

CALL$4222026-05-1817,568

CALL$4202026-05-2212,243

CALL$4252026-05-2212,065

P/C OI RATIO

0.48

TOTAL OI

272,564

CALL OI

184,222

PUT OI

88,342

Put/Call volume ratio: 0.22 (bullish)
Total options volume: 502,536 (calls 412,994 / puts 89,542)
Top unusual: PUT $427.5 exp 2026-05-18 — vol/OI 221.0x
106 unusual strikes detected (68C / 38P)

👤 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.

17% BUY

83% SELL

SHARES BOUGHT (6m)

13,555

SHARES SOLD (6m)

66,420

NET INSIDER FLOW

-52,865

FORM 4 FILINGS (90d)

Recent Insider Transactions (1 buys / 1 sells / 8 grants)

TypeInsiderSharesDate

SELLHOGAN KATHLEEN T12,3202026-03-06

BUYSTANTON JOHN W.5,0002026-02-18

GRANTSTANTON JOHN W.1452026-01-30

GRANTLIST TERI1452026-01-30

GRANTSCHARF CHARLES W1452026-01-30

GRANTMASON MARK A.L.1452026-01-30

GRANTSTANTON JOHN W.1302025-12-04

GRANTLIST TERI1302025-12-04

GRANTSCHARF CHARLES W1302025-12-04

GRANTMASON MARK A.L.1302025-12-04

Insider buying: 13,555 shares
Insider selling: 66,420 shares
20 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

75.7%

ACCUMULATION vs DISTRIBUTION

30% ACCUMULATING

70% DISTRIBUTING

NET SHARES FLOW

+311,906,957

FLOW SCORE

+0.28

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONVanguard Capital Management LLC6.50%NEW+241,279,043

★ NEW POSITIONVanguard Portfolio Management LLC2.25%NEW+83,745,424

▲▲ HEAVY BUYCapital Research Global Investors1.29%+31.1%+22,767,566

▬ HOLDState Street Corporation4.12%+2.1%+6,385,007

▬ HOLDGeode Capital Management, LLC2.46%+1.1%+1,915,451

▬ HOLDMorgan Stanley1.63%+0.8%+985,924

▬ HOLDPrice (T.Rowe) Associates Inc1.69%-4.9%-6,463,227

▬ HOLDBlackrock Inc.7.99%-1.4%-8,546,627

▬ HOLDFMR, LLC2.71%-4.5%-9,534,910

▼ TRIMMINGJPMORGAN CHASE & CO1.71%-14.0%-20,626,694

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

ActionFundQoQ ΔShares Δ

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar-0.2%-397,751

▬ HOLDVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+2.2%+4,016,548

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.7%+701,146

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+245,921

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +3.0%+2,626,201

▲ ADDINGVANGUARD INDEX FUNDS-Vanguard Growth Index Fu+9.6%+6,787,142

▬ HOLDInvesco QQQ Trust, Series 1+1.6%+906,620

▬ HOLDVANGUARD INSTITUTIONAL INDEX FUNDS-Vanguard I-1.6%-675,938

▬ HOLDVANGUARD WORLD FUND-Vanguard Information Tech+2.5%+830,425

▬ HOLDGROWTH FUND OF AMERICA-0.6%-188,671

Institutional ownership: 75.7%
Smart money flow: 3 adding / 1 selling / 6 hold
Net shares added by institutions: +311,906,957
Biggest mover: Vanguard Capital Management LLC added 241,279,043 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

1.1%

DAYS TO COVER

2.3

SI CHANGE (MoM)

↓ 2.3%

SQUEEZE RISK

MINIMAL

SHARES SHORT

79,107,882

PRIOR MONTH

80,991,357

FLOAT SHARES

7,417,589,189

AVG VOLUME

34,141,903

Short interest: 1.1% of float
Days to cover: 2.3
Short interest MoM: ↓ 2.3%
Squeeze risk: MINIMAL

📡 Data Sources 数据来源

Options Flow

BULLISH (80%)

Insider Trading

BEARISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

NEUTRAL (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 1.1% of float
[dark_pool] Days to cover: 2.3
[institutional] Institutional ownership: 75.7%
[institutional] Smart money flow: 3 adding / 1 selling / 6 hold
[options_flow] Put/Call volume ratio: 0.22 (bullish)
[options_flow] Total options volume: 502,536 (calls 412,994 / puts 89,542)
[insider] Insider buying: 13,555 shares
[insider] Insider selling: 66,420 shares