Whale Tracker

LEAN BEARISH

Whales showing caution on SNDK. Distribution signals outweigh accumulation. Short interest at 11.4% of float — moderate bearish positioning. Insiders are net buyers (21,401 shares bought vs 7,796 sold) — bullish conviction from management. Strong institutional ownership at 80.0% with 8 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)

1.56

BEARISH

CALL VOLUME

33,877

PUT VOLUME

52,705

TOTAL VOLUME

86,582

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

PUT$14452026-05-29217372.3x

PUT$11252026-06-2661161.0x

PUT$6302026-06-1242142.0x

PUT$14852026-05-2939139.0x

PUT$7102026-06-12104334.7x

PUT$14402026-05-294331333.3x

CALL$23902026-05-2925125.0x

CALL$22002026-06-2625125.0x

PUT$14352026-05-292061020.6x

PUT$3402026-05-2282420.5x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

PUT$8002026-05-225,849

PUT$9002026-05-223,362

PUT$11002026-05-222,240

CALL$15002026-05-221,669

CALL$24002026-05-221,667

CALL$20002026-05-221,503

CALL$18002026-05-221,251

PUT$12002026-05-221,215

CALL$14002026-05-221,136

PUT$10002026-05-291,131

P/C OI RATIO

1.52

TOTAL OI

218,132

CALL OI

86,524

PUT OI

131,608

Put/Call volume ratio: 1.56 (bearish)
Total options volume: 86,582 (calls 33,877 / puts 52,705)
Top unusual: PUT $1445.0 exp 2026-05-29 — vol/OI 72.3x
117 unusual strikes detected (43C / 74P)

👤 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)

21,401

SHARES SOLD (6m)

7,796

NET INSIDER FLOW

+13,605

FORM 4 FILINGS (90d)

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

TypeInsiderSharesDate

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

GRANTSHOOK ELLYN J9792025-11-18

GRANTSUZUKI MIYUKI9792025-11-18

Insider buying: 21,401 shares
Insider selling: 7,796 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

80.0%

ACCUMULATION vs DISTRIBUTION

80% ACCUMULATING

20% DISTRIBUTING

NET SHARES FLOW

+10,295,951

FLOW SCORE

+0.44

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

▲▲ HEAVY BUYGeode Capital Management, LLC2.47%+44.9%+1,133,359

▲▲ HEAVY BUYState Street Corporation3.57%+20.7%+905,053

▲▲ HEAVY BUYShaw D.E. & Co., Inc.1.41%+63.1%+809,424

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

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

▬ HOLDFMR, LLC14.50%-1.7%-369,016

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

ETF & Mutual Fund Flow (2 adding / 1 selling)

ActionFundQoQ ΔShares Δ

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

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

▼▼ HEAVY SEFidelity Mt. Vernon Street Trust-Fidelity Gro-22.5%-1,015,676

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

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

▬ HOLDiShares Trust-iShares Core S&P 500 ETF+0.8%+15,617

▬ HOLDFidelity Concord Street Trust-Fidelity 500 In+0.3%+6,574

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +3.0%+52,144

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

▬ HOLDSELECT SECTOR SPDR TRT-State Street Technolog+2.3%+25,470

Institutional ownership: 80.0%
Smart money flow: 8 adding / 1 selling / 1 hold
Net shares added by institutions: +10,295,951
Biggest mover: Vanguard Capital Management LLC added 4,763,059 shares (+100.0%)

🕶 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

11.4%

DAYS TO COVER

0.7

SI CHANGE (MoM)

↑ 34.3%

SQUEEZE RISK

MODERATE

SHARES SHORT

10,827,454

PRIOR MONTH

8,063,499

FLOAT SHARES

139,533,132

AVG VOLUME

17,715,855

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

Short interest: 11.4% of float
Days to cover: 0.7
Short interest MoM: ↑ 34.3%
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: 11.4% of float
[dark_pool] Days to cover: 0.7
[institutional] Institutional ownership: 80.0%
[institutional] Smart money flow: 8 adding / 1 selling / 1 hold
[insider] Insider buying: 21,401 shares
[insider] Insider selling: 7,796 shares
[options_flow] Put/Call volume ratio: 1.56 (bearish)
[options_flow] Total options volume: 86,582 (calls 33,877 / puts 52,705)