Whale Tracker

LEAN BEARISH

Whales showing caution on SNDK. Distribution signals outweigh accumulation. Short interest at 10.3% of float — moderate bearish positioning. Insiders are net buyers (21,401 shares bought vs 4,771 sold) — bullish conviction from management. Strong institutional ownership at 83.5% with 6 of 10 top holders actively accumulating this quarter.

Action Plan

Avoid new long positions until whale activity shifts
Consider trimming if position size is large
Set alerts for insider buying or SI decrease as reversal signals

📈 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)

1.82

BEARISH

CALL VOLUME

45,408

PUT VOLUME

82,460

TOTAL VOLUME

127,868

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$4902026-05-29500683.3x

CALL$13102026-05-087412430.9x

CALL$3152026-05-0830130.0x

PUT$11502026-05-085692225.9x

PUT$7382026-05-0850225.0x

PUT$5502026-05-083,53515023.6x

PUT$9252026-05-081,2955523.5x

PUT$9952026-05-083322016.6x

CALL$8152026-05-2915115.0x

PUT$9352026-05-081,1718014.6x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

PUT$5502026-05-083,535

CALL$12002026-05-083,511

PUT$10002026-05-083,158

PUT$5502026-05-153,113

CALL$13002026-05-082,838

PUT$9502026-05-082,803

PUT$8502026-05-082,144

PUT$6002026-05-152,104

CALL$11502026-05-082,102

PUT$9202026-06-182,036

P/C OI RATIO

1.25

TOTAL OI

203,271

CALL OI

90,170

PUT OI

113,101

Put/Call volume ratio: 1.82 (bearish)
Total options volume: 127,868 (calls 45,408 / puts 82,460)
Top unusual: PUT $490.0 exp 2026-05-29 — vol/OI 83.3x
102 unusual strikes detected (37C / 65P)

👤 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

83.5%

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 (2 adding / 2 selling)

ActionFundQoQ ΔShares Δ

▼ TRIMMINGFidelity Mt. Vernon Street Trust-Fidelity Gro-19.0%-1,055,198

▬ 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+0.8%+15,617

▲ ADDINGFidelity Concord Street Trust-Fidelity 500 In+6.2%+109,495

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P -1.2%-21,712

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

▼▼ HEAVY SEFidelity Mt. Vernon Street Trust-Fidelity Gro-20.5%-299,941

▬ HOLDSELECT SECTOR SPDR TRT-State Street Technolog-3.3%-37,554

Institutional ownership: 83.5%
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

10.3%

DAYS TO COVER

0.5

SI CHANGE (MoM)

↑ 20.5%

SQUEEZE RISK

MODERATE

SHARES SHORT

9,750,678

PRIOR MONTH

8,092,994

FLOAT SHARES

139,418,960

AVG VOLUME

18,661,435

Elevated short interest — bears have a notable position. Watch for SI trend direction as the key signal.

Short interest: 10.3% of float
Days to cover: 0.5
Short interest MoM: ↑ 20.5%
Squeeze risk: MODERATE

📡 Data Sources 数据来源

Options Flow

BEARISH (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

BEARISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 10.3% of float
[dark_pool] Days to cover: 0.5
[institutional] Institutional ownership: 83.5%
[institutional] Smart money flow: 6 adding / 1 selling / 3 hold
[options_flow] Put/Call volume ratio: 1.82 (bearish)
[options_flow] Total options volume: 127,868 (calls 45,408 / puts 82,460)
[insider] Insider buying: 21,401 shares
[insider] Insider selling: 4,771 shares