Whale Tracker

LEAN BULLISH

Net positive whale activity for SNDK. Smart money shows interest, but signals are mixed. Insiders are net buyers (21,401 shares bought vs 4,771 sold) — bullish conviction from management. Strong institutional ownership at 82.5% with 6 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)

0.79

LEAN BULLISH

CALL VOLUME

43,574

PUT VOLUME

34,516

TOTAL VOLUME

78,090

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (10C / 0P)

TypeStrikeExpiryVolOIRatio

CALL$5102026-04-2410110.0x

CALL$4702026-04-027088.8x

CALL$4302026-04-10218385.7x

CALL$6982026-03-275491005.5x

CALL$7022026-03-278701725.1x

CALL$5552026-04-104085.0x

CALL$7552026-05-012354.6x

CALL$6922026-03-27267614.4x

CALL$7122026-03-275391234.4x

CALL$7052026-03-271,6013764.3x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$8002026-03-274,679

PUT$6002026-03-273,002

CALL$7002026-03-272,817

PUT$6502026-03-271,618

CALL$7052026-03-271,601

CALL$7102026-03-271,405

CALL$7502026-03-271,369

CALL$7802026-03-271,123

PUT$7002026-03-271,078

CALL$10002026-04-171,068

P/C OI RATIO

1.0

TOTAL OI

184,669

CALL OI

92,562

PUT OI

92,107

Put/Call volume ratio: 0.79 (bullish)
Total options volume: 78,090 (calls 43,574 / puts 34,516)
Top unusual: CALL $510.0 exp 2026-04-24 — vol/OI 10.0x
20 unusual strikes detected (17C / 3P)

👤 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.

82% BUY

18% SELL

SHARES BOUGHT (6m)

21,401

SHARES SOLD (6m)

4,771

NET INSIDER FLOW

+16,630

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 2 sells / 8 grants)

TypeInsiderSharesDate

SELLSUZUKI MIYUKI3,5002026-02-25

GRANTBRADLEY ALEXANDER R.8632025-12-30

SELLSAYINER NECIP1,2712025-12-03

GRANTSAYINER NECIP9792025-11-18

GRANTCAULFIELD THOMAS9792025-11-18

GRANTKUMAR DEVINDER9792025-11-18

GRANTSHOOK ELLYN J9792025-11-18

GRANTSUZUKI MIYUKI9792025-11-18

GRANTCASSIDY RICHARD B II1,1432025-11-18

GRANTGOECKELER DAVID V85,0252025-09-03

Insider buying: 21,401 shares
Insider selling: 4,771 shares
12 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

82.5%

ACCUMULATION vs DISTRIBUTION

60% ACCUMULATING

40% DISTRIBUTING

NET SHARES FLOW

-3,114,008

FLOW SCORE

+0.10

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

▲▲ HEAVY BUYGeode Capital Management, LLC2.48%+44.9%+1,133,359

▲▲ HEAVY BUYState Street Corporation3.58%+20.7%+905,053

▲▲ HEAVY BUYArrowstreet Capital, Limited Partnership2.36%+31.3%+828,297

▲▲ HEAVY BUYShaw D.E. & Co., Inc.1.42%+63.1%+809,424

▲▲ HEAVY BUYNORGES BANK1.48%+24.9%+435,219

▲ ADDINGMorgan Stanley2.01%+7.2%+199,501

▬ HOLDBank of America Corporation1.11%-3.1%-52,104

▬ HOLDFMR, LLC14.54%-1.7%-369,016

▬ HOLDVanguard Group Inc11.50%-3.3%-584,790

▼▼ HEAVY SELLBlackrock Inc.6.52%-40.0%-6,418,951

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

ActionFundQoQ ΔShares Δ

▼ TRIMMINGFidelity Mt. Vernon Street Trust-Fidelity Gro-10.9%-678,746

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar-0.1%-2,621

★ NEW POSIVANGUARD INDEX FUNDS-Vanguard 500 Index FundNEW+1,755,738

▬ HOLDVANGUARD INDEX FUNDS-Vanguard Small-Cap Index-3.8%-123,768

▬ HOLDiShares Trust-iShares Core S&P 500 ETF-0.9%-17,000

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.5%+8,274

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P -1.5%-25,273

▼ TRIMMINGFidelity Mt. Vernon Street Trust-Fidelity Gro-19.3%-350,132

▼ TRIMMINGFidelity Mt. Vernon Street Trust-Fidelity Ser-16.2%-259,115

▼▼ HEAVY SEVANGUARD WORLD FUND-Vanguard Information Tech-55.4%-1,565,295

Institutional ownership: 82.5%
Smart money flow: 6 adding / 1 selling / 3 hold
Net shares removed by institutions: -3,114,008
Biggest mover: Blackrock Inc. sold 6,418,951 shares (-40.0%)

🕶 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

8.6%

DAYS TO COVER

0.4

SI CHANGE (MoM)

↑ 6.2%

SQUEEZE RISK

LOW

SHARES SHORT

8,092,994

PRIOR MONTH

7,617,435

FLOAT SHARES

139,062,948

AVG VOLUME

18,637,718

Short interest: 8.6% of float
Days to cover: 0.4
Short interest MoM: ↑ 6.2%
Squeeze risk: LOW

📡 Data Sources 数据来源

Options Flow

LEAN BULLISH (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

LEAN BEARISH (60%)

📋 Summary 综合摘要

[institutional] Institutional ownership: 82.5%
[institutional] Smart money flow: 6 adding / 1 selling / 3 hold
[dark_pool] Short interest: 8.6% of float
[dark_pool] Days to cover: 0.4
[insider] Insider buying: 21,401 shares
[insider] Insider selling: 4,771 shares
[options_flow] Put/Call volume ratio: 0.79 (bullish)
[options_flow] Total options volume: 78,090 (calls 43,574 / puts 34,516)