Whale Tracker

LEAN BULLISH

Net positive whale activity for SNDK. Smart money shows interest, but signals are mixed. Insiders are net buyers (27,723 shares bought vs 10,396 sold) — bullish conviction from management. Strong institutional ownership at 80.8% with 7 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)

1.14

NEUTRAL

CALL VOLUME

48,239

PUT VOLUME

55,161

TOTAL VOLUME

103,400

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (5C / 5P)

TypeStrikeExpiryVolOIRatio

PUT$5702026-06-1278178.0x

PUT$5652026-06-1251151.0x

PUT$13502026-06-263,13417018.4x

CALL$16852026-07-0211111.0x

CALL$20302026-07-171021010.2x

CALL$24902026-06-2610110.0x

PUT$8352026-07-0210110.0x

PUT$7252026-06-262839.3x

CALL$16402026-07-106479.1x

CALL$16452026-07-104559.0x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

PUT$13502026-06-184,334

PUT$13502026-06-123,677

PUT$13502026-06-263,134

CALL$17002026-06-122,692

CALL$18002026-06-122,482

PUT$16002026-06-122,350

CALL$19002026-06-122,038

CALL$20002026-06-121,705

PUT$15002026-06-121,648

CALL$17502026-06-121,415

P/C OI RATIO

1.72

TOTAL OI

363,123

CALL OI

133,325

PUT OI

229,798

Put/Call volume ratio: 1.14 (bearish)
Total options volume: 103,400 (calls 48,239 / puts 55,161)
Top unusual: PUT $570.0 exp 2026-06-12 — vol/OI 78.0x
52 unusual strikes detected (28C / 24P)

👤 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.

73% BUY

27% SELL

SHARES BOUGHT (6m)

27,723

SHARES SOLD (6m)

10,396

NET INSIDER FLOW

+17,327

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 6 sells / 4 grants)

TypeInsiderSharesDate

SELLSHEK BERNARD6002026-06-03

SELLILKBAHAR ALPER2,0002026-06-01

SELLPOKORNY MICHAEL2,4462026-05-12

SELLSAYINER NECIP5792026-05-08

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

Insider buying: 27,723 shares
Insider selling: 10,396 shares
16 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

80.8%

ACCUMULATION vs DISTRIBUTION

70% ACCUMULATING

30% DISTRIBUTING

NET SHARES FLOW

+1,644,201

FLOW SCORE

+0.23

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONVanguard Capital Management LLC6.43%NEW+4,763,059

★ NEW POSITIONVanguard Portfolio Management LLC2.42%NEW+1,788,243

★ NEW POSITIONGoldman Sachs Group Inc1.38%NEW+1,383,889

★ NEW POSITIONJane Street Group, LLC1.21%NEW+941,507

▲ ADDINGBlackrock Inc.7.03%+8.1%+778,646

▲ ADDINGGeode Capital Management, LLC2.84%+15.2%+556,803

▲ ADDINGState Street Corporation3.76%+5.5%+292,081

▬ HOLDMorgan Stanley1.92%-4.4%-130,998

▼ TRIMMINGArrowstreet Capital, Limited Partnership1.91%-18.8%-653,825

▼▼ HEAVY SELLFMR, LLC9.04%-37.6%-8,075,204

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

ActionFundQoQ ΔShares Δ

▲ ADDINGVANGUARD INDEX FUNDS-Vanguard Total Stock Mar+6.0%+260,698

▲ ADDINGVANGUARD INDEX FUNDS-Vanguard 500 Index Fund+6.8%+238,790

★ NEW POSIInvesco QQQ Trust, Series 1NEW+1,579,598

▼ TRIMMINGFidelity Mt. Vernon Street Trust-Fidelity Gro-16.7%-581,147

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.6%+10,820

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+6,597

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +2.5%+43,948

★ NEW POSIVANGUARD INDEX FUNDS-Vanguard Growth Index FuNEW+817,690

▬ HOLDVANGUARD WORLD FUND-Vanguard Information Tech+2.5%+32,184

▬ HOLDSELECT SECTOR SPDR TRT-State Street Technolog+2.4%+26,011

Institutional ownership: 80.8%
Smart money flow: 7 adding / 2 selling / 1 hold
Net shares added by institutions: +1,644,201
Biggest mover: FMR, LLC sold 8,075,204 shares (-37.6%)

🕶 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

9.7%

DAYS TO COVER

0.6

SI CHANGE (MoM)

↓ 14.9%

SQUEEZE RISK

LOW

SHARES SHORT

9,209,981

PRIOR MONTH

10,827,454

FLOAT SHARES

146,012,059

AVG VOLUME

15,545,872

Short interest: 9.7% of float
Days to cover: 0.6
Short interest MoM: ↓ 14.9%
Squeeze risk: LOW

📡 Data Sources 数据来源

Options Flow

NEUTRAL (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

BULLISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 9.7% of float
[dark_pool] Days to cover: 0.6
[institutional] Institutional ownership: 80.8%
[institutional] Smart money flow: 7 adding / 2 selling / 1 hold
[options_flow] Put/Call volume ratio: 1.14 (bearish)
[options_flow] Total options volume: 103,400 (calls 48,239 / puts 55,161)
[insider] Insider buying: 27,723 shares
[insider] Insider selling: 10,396 shares