Whale Tracker

NEUTRAL — WATCH

No clear whale direction for SNDK. Bullish and bearish signals roughly cancel out. Insiders are net buyers (21,401 shares bought vs 4,771 sold) — bullish conviction from management. Strong institutional ownership at 83.2% with 6 of 10 top holders actively accumulating this quarter.

Action Plan

Hold existing positions — no strong directional signal
Wait for clearer whale activity before adding
Monitor next earnings for institutional positioning changes

📈 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)

1.52

BEARISH

CALL VOLUME

27,469

PUT VOLUME

41,738

TOTAL VOLUME

69,207

UNUSUAL STRIKES

Unusual Strikes — Vol/OI > 3x (4C / 6P)

TypeStrikeExpiryVolOIRatio

CALL$7952026-05-016751837.5x

CALL$8152026-05-2915115.0x

PUT$4552026-05-0813113.0x

PUT$7952026-04-24522598.8x

PUT$7902026-04-249911218.2x

PUT$7302026-04-243,1594337.3x

CALL$11802026-05-01121186.7x

CALL$12302026-05-15102166.4x

PUT$3652026-04-244175.9x

PUT$7722026-04-24112195.9x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

PUT$4802026-04-245,047

CALL$10002026-04-243,523

PUT$8002026-04-243,295

PUT$7302026-04-243,159

PUT$5002026-04-242,106

PUT$7002026-04-241,862

CALL$9502026-04-241,844

CALL$9102026-04-241,409

CALL$9202026-04-241,328

CALL$9002026-04-241,308

P/C OI RATIO

1.32

TOTAL OI

149,089

CALL OI

64,280

PUT OI

84,809

Put/Call volume ratio: 1.52 (bearish)
Total options volume: 69,207 (calls 27,469 / puts 41,738)
Top unusual: CALL $795.0 exp 2026-05-01 — vol/OI 37.5x
28 unusual strikes detected (13C / 15P)

👤 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
11 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

83.2%

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 / 3 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

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

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

▬ HOLDSPDR S&P 500 ETF TRUST-State Street SPDR S&P +4.0%+66,003

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

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

▬ HOLDSELECT SECTOR SPDR TRT-State Street Technolog+4.2%+46,674

Institutional ownership: 83.2%
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

8.5%

DAYS TO COVER

0.4

SI CHANGE (MoM)

↓ 5.3%

SQUEEZE RISK

LOW

SHARES SHORT

8,063,499

PRIOR MONTH

8,519,014

FLOAT SHARES

139,059,997

AVG VOLUME

19,951,301

Short interest: 8.5% of float
Days to cover: 0.4
Short interest MoM: ↓ 5.3%
Squeeze risk: LOW

📡 Data Sources 数据来源

Options Flow

BEARISH (80%)

Insider Trading

BULLISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

NEUTRAL (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 8.5% of float
[dark_pool] Days to cover: 0.4
[institutional] Institutional ownership: 83.2%
[institutional] Smart money flow: 6 adding / 1 selling / 3 hold
[options_flow] Put/Call volume ratio: 1.52 (bearish)
[options_flow] Total options volume: 69,207 (calls 27,469 / puts 41,738)
[insider] Insider buying: 21,401 shares
[insider] Insider selling: 4,771 shares