Whale Tracker

LEAN BULLISH

Net positive whale activity for MRVL. Smart money shows interest, but signals are mixed. Insiders are net buyers (1,887,066 shares bought vs 219,813 sold) — bullish conviction from management. Strong institutional ownership at 83.8%, 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)

0.7

NEUTRAL

CALL VOLUME

35,743

PUT VOLUME

25,017

TOTAL VOLUME

60,760

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (2C / 8P)

TypeStrikeExpiryVolOIRatio

PUT$1802026-05-0840140.0x

PUT$1782026-05-0825125.0x

PUT$1682026-05-086803221.2x

CALL$1722026-05-082,66213819.3x

PUT$1652026-06-0571514.2x

PUT$1482026-05-153,54927512.9x

PUT$1652026-05-081,06710510.2x

PUT$1232026-05-08210239.1x

CALL$1202026-05-08711868.3x

PUT$1622026-05-081,3471707.9x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$1652026-05-084,730

PUT$1482026-05-153,549

CALL$1682026-05-082,723

CALL$1722026-05-082,662

CALL$1702026-05-082,504

PUT$1602026-05-082,276

CALL$2002026-06-181,665

CALL$1802026-06-181,613

PUT$1622026-05-081,347

CALL$1802026-05-151,315

P/C OI RATIO

1.23

TOTAL OI

627,096

CALL OI

281,079

PUT OI

346,017

Put/Call volume ratio: 0.7 (bullish)
Total options volume: 60,760 (calls 35,743 / puts 25,017)
Top unusual: PUT $180.0 exp 2026-05-08 — vol/OI 40.0x
15 unusual strikes detected (5C / 10P)

👤 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.

90% BUY

10% SELL

SHARES BOUGHT (6m)

1,887,066

SHARES SOLD (6m)

219,813

NET INSIDER FLOW

+1,667,253

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

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

SELLMURPHY MATTHEW JOSEPH30,0002026-03-26

SELLBHARATHI SANDEEP44,4142026-03-26

SELLCASPER MARK JOHN5,0002026-01-05

Insider buying: 1,887,066 shares
Insider selling: 219,813 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

83.8%

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 (3 adding / 1 selling)

ActionFundQoQ ΔShares Δ

▲ ADDINGFidelity Select Portfolios-Select Semiconduct+8.5%+2,712,628

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

▬ HOLDInvesco QQQ Trust, Series 1+0.1%+16,502

▬ HOLDFidelity Securities Fund-Fidelity Blue Chip G+1.2%+219,212

▬ HOLDFidelity Select Portfolios-Technology Portfol+1.3%+198,895

▲▲ 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: 83.8%
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

870,732,856

AVG VOLUME

22,817,742

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

NEUTRAL (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: 83.8%
[institutional] Smart money flow: 2 adding / 2 selling / 6 hold
[insider] Insider buying: 1,887,066 shares
[insider] Insider selling: 219,813 shares
[options_flow] Put/Call volume ratio: 0.7 (bullish)
[options_flow] Total options volume: 60,760 (calls 35,743 / puts 25,017)