Whale Tracker

STRONG BUY SIGNAL

Whales are aggressively accumulating MRVL. Multiple signals confirm institutional conviction. Insiders are net buyers (1,887,066 shares bought vs 229,813 sold) — bullish conviction from management. Strong institutional ownership at 87.8%, but 2 of 10 top holders are distributing.

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)

0.55

BULLISH

CALL VOLUME

40,578

PUT VOLUME

22,437

TOTAL VOLUME

63,015

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (9C / 1P)

TypeStrikeExpiryVolOIRatio

PUT$1522026-05-292,8246742.1x

CALL$1442026-05-2940140.0x

CALL$1292026-06-0540140.0x

CALL$1332026-06-0540140.0x

CALL$1392026-06-0540140.0x

CALL$1722026-05-152,59310824.0x

CALL$1242026-06-0524124.0x

CALL$1462026-06-0541220.5x

CALL$2452026-05-1520120.0x

CALL$1432026-06-0540220.0x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$1752026-05-155,220

CALL$1802026-05-154,898

PUT$1522026-05-292,824

CALL$1722026-05-152,593

CALL$1702026-05-152,548

PUT$1652026-05-151,955

CALL$2002026-05-221,706

CALL$2002026-05-151,523

CALL$1652026-05-151,353

PUT$1502026-05-151,172

P/C OI RATIO

1.37

TOTAL OI

662,467

CALL OI

279,357

PUT OI

383,110

Put/Call volume ratio: 0.55 (bullish)
Total options volume: 63,015 (calls 40,578 / puts 22,437)
Top unusual: PUT $152.5 exp 2026-05-29 — vol/OI 42.1x
36 unusual strikes detected (30C / 6P)

👤 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.

89% BUY

11% SELL

SHARES BOUGHT (6m)

1,887,066

SHARES SOLD (6m)

229,813

NET INSIDER FLOW

+1,657,253

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

SELLKOOPMANS CHRISTOPHER R10,0002026-05-01

SELLCASPER MARK JOHN10,0002026-04-17

SELLBHARATHI SANDEEP66,8922026-04-16

SELLMURPHY MATTHEW JOSEPH7,5002026-04-15

SELLMEINTJES WILLEM A30,0002026-04-15

SELLCASPER MARK JOHN6,9002026-04-06

SELLCASPER MARK JOHN17,8542026-04-02

SELLBHARATHI SANDEEP44,4142026-03-26

SELLMURPHY MATTHEW JOSEPH30,0002026-03-26

Insider buying: 1,887,066 shares
Insider selling: 229,813 shares
13 Form 4 filings in last 90 days
Net insider BUYING — bullish 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

87.8%

ACCUMULATION vs DISTRIBUTION

20% ACCUMULATING

80% DISTRIBUTING

NET SHARES FLOW

+4,533,120

FLOW SCORE

+0.01

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

▲ ADDINGState Street Corporation2.61%+7.9%+1,677,754

▲ ADDINGNORGES BANK1.21%+13.8%+1,276,989

▬ HOLDFMR, LLC14.50%+4.2%+5,076,592

▬ HOLDAmeriprise Financial, Inc.1.96%+3.1%+522,022

▬ HOLDGeode Capital Management, LLC1.38%+0.8%+97,290

▬ HOLDBlackrock Inc.6.84%-0.1%-53,874

▬ HOLDFranklin Resources, Inc.1.32%-3.0%-352,337

▬ HOLDVanguard Group Inc9.01%-1.1%-851,796

▼ TRIMMINGGoldman Sachs Group Inc1.20%-10.0%-1,166,631

▼ TRIMMINGBank of America Corporation1.31%-12.9%-1,692,889

ETF & Mutual Fund Flow (4 adding / 1 selling)

ActionFundQoQ ΔShares Δ

▲ ADDINGFidelity Select Portfolios-Select Semiconduct+5.4%+1,878,082

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar-0.2%-51,577

▬ HOLDInvesco QQQ Trust, Series 1+1.6%+293,643

▬ HOLDFidelity Securities Fund-Fidelity Blue Chip G+0.3%+63,143

▲ ADDINGFidelity Select Portfolios-Technology Portfol+6.2%+978,848

▲▲ HEAVY BUiShares Trust-iShares Semiconductor ETF+30.0%+2,437,715

▲▲ HEAVY BUColumbia Fd.s Series TRT II-Columbia Seligman+24.4%+1,997,033

▬ HOLDVanEck ETF Trust-VanEck Semiconductor ETF-0.6%-56,368

▼ TRIMMINGVANGUARD INDEX FUNDS-Vanguard Growth Index Fu-9.8%-1,051,733

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Mid-Cap Index F-1.6%-152,556

Institutional ownership: 87.8%
Smart money flow: 2 adding / 2 selling / 6 hold
Net shares added by institutions: +4,533,120
Biggest mover: FMR, LLC added 5,076,592 shares (+4.2%)

🕶 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

3.9%

DAYS TO COVER

1.2

SI CHANGE (MoM)

↓ 14.3%

SQUEEZE RISK

MINIMAL

SHARES SHORT

28,955,038

PRIOR MONTH

33,803,277

FLOAT SHARES

870,575,482

AVG VOLUME

23,156,726

Short interest: 3.9% of float
Days to cover: 1.2
Short interest MoM: ↓ 14.3%
Squeeze risk: MINIMAL

📡 Data Sources 数据来源

Options Flow

BULLISH (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

NEUTRAL (75%)

Short Interest

BULLISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 3.9% of float
[dark_pool] Days to cover: 1.2
[institutional] Institutional ownership: 87.8%
[institutional] Smart money flow: 2 adding / 2 selling / 6 hold
[options_flow] Put/Call volume ratio: 0.55 (bullish)
[options_flow] Total options volume: 63,015 (calls 40,578 / puts 22,437)
[insider] Insider buying: 1,887,066 shares
[insider] Insider selling: 229,813 shares