Whale Tracker

LEAN BEARISH

Whales showing caution on NBIS. Distribution signals outweigh accumulation. Short interest at 19.3% of float — moderate bearish positioning. Insiders are net sellers (125,240 shares sold vs 0 bought) — management reducing exposure.

Action Plan

Avoid new long positions until whale activity shifts
Insider selling suggests management has near-term concerns
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)

0.8

NEUTRAL

CALL VOLUME

23,011

PUT VOLUME

18,369

TOTAL VOLUME

41,380

UNUSUAL STRIKES

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

TypeStrikeExpiryVolOIRatio

CALL$852026-05-015077.1x

PUT$1212026-05-2253105.3x

PUT$1332026-05-224285.2x

PUT$1352026-05-087471714.4x

CALL$1362026-05-081234.0x

PUT$1132026-04-24102263.9x

PUT$1232026-05-2251153.4x

CALL$832026-04-241033.3x

CALL$912026-05-082063.3x

PUT$1242026-05-223093.3x

High Volume Contracts — Vol > 500 (10 contracts)

TypeStrikeExpiryVolume

CALL$1602026-04-245,551

CALL$1702026-04-242,931

PUT$1552026-04-242,118

CALL$2002026-05-151,967

CALL$1502026-04-241,786

PUT$1502026-04-241,014

PUT$1352026-04-24990

CALL$1652026-04-24949

PUT$1402026-04-24777

PUT$1352026-05-08747

P/C OI RATIO

1.01

TOTAL OI

187,125

CALL OI

93,321

PUT OI

93,804

Put/Call volume ratio: 0.8 (bullish)
Total options volume: 41,380 (calls 23,011 / puts 18,369)
Top unusual: CALL $85.0 exp 2026-05-01 — vol/OI 7.1x
12 unusual strikes detected (4C / 8P)

👤 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.

0% BUY

100% SELL

SHARES BOUGHT (6m)

SHARES SOLD (6m)

125,240

NET INSIDER FLOW

-125,240

FORM 4 FILINGS (90d)

Recent Insider Transactions (0 buys / 5 sells / 0 grants)

TypeInsiderSharesDate

SELLBUNINA ELENA20,0602026-04-14

SELLKOROLENKO ANDREY31,3572026-04-06

SELLVOLOZH ARKADY33,3582026-04-01

SELLSHTAN DANILA13,4892026-03-31

SELLKOROLENKO ANDREY26,9762026-03-31

Insider selling: 125,240 shares
7 Form 4 filings in last 90 days
Net insider SELLING — bearish 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

48.6%

ACCUMULATION vs DISTRIBUTION

70% ACCUMULATING

30% DISTRIBUTING

NET SHARES FLOW

+8,099,764

FLOW SCORE

+0.40

ADDING

SELLING

Institutional Position Changes (QoQ)

ActionInstitution% HeldQoQ ΔShares Δ

★ NEW POSITIONBlackrock Inc.4.32%NEW+9,407,533

★ NEW POSITIONState Street Corporation1.48%NEW+3,090,102

★ NEW POSITIONJanus Henderson Group PLC1.29%NEW+1,420,339

▲▲ HEAVY BUYUBS Group AG2.10%+68.8%+1,867,786

▲▲ HEAVY BUYClear Street Group Inc.1.61%+95.0%+1,710,899

▲▲ HEAVY BUYValue Aligned Research Advisors, LLC1.52%+64.5%+1,296,307

▲▲ HEAVY BUYMorgan Stanley1.70%+35.2%+964,931

▬ HOLDAccel Leaders 4 Associates L.P.2.10%0.0%0

▼▼ HEAVY SELLFred Alger Management, LLC3.64%-21.7%-2,194,727

▼▼ HEAVY SELLOrbis Allan Gray Ltd1.53%-73.9%-9,463,406

ETF & Mutual Fund Flow (5 adding / 0 selling)

ActionFundQoQ ΔShares Δ

▲▲ HEAVY BUALGER INSTITUTIONAL FUNDS-Alger Focus Equity +49.0%+760,945

★ NEW POSIEuroPacific Growth Fund-EUPAC FundNEW+966,991

▲▲ HEAVY BUJANUS INVESTMENT FUND-Janus Henderson Contrar+45.4%+483,801

▬ HOLDALGER FUNDS II-Alger Spectra Fund-4.4%-68,649

▬ HOLDiShares Trust-iShares Core MSCI EAFE ETF0.0%0

▬ HOLDALGER Inst. Fd.S-Alger Capital Appreciation I+1.6%+17,160

★ NEW POSIJANUS INVESTMENT Fd.-Janus Henderson Global TNEW+437,704

▬ HOLDALGER FUNDS-Alger Capital Appreciation Fund-1.0%-8,559

▬ HOLDFidelity Concord Street Trust-Fidelity Intern+1.2%+9,099

▲▲ HEAVY BUFidelity Salem Street Trust-Fidelity Series G+91.8%+364,832

Institutional ownership: 48.6%
Smart money flow: 7 adding / 2 selling / 1 hold
Net shares added by institutions: +8,099,764
Biggest mover: Orbis Allan Gray Ltd sold 9,463,406 shares (-73.9%)

🕶 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

19.3%

DAYS TO COVER

2.4

SI CHANGE (MoM)

↓ 3.7%

SQUEEZE RISK

MODERATE

SHARES SHORT

42,357,317

PRIOR MONTH

43,984,965

FLOAT SHARES

209,649,862

AVG VOLUME

16,010,548

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

Short interest: 19.3% of float
Days to cover: 2.4
Short interest MoM: ↓ 3.7%
Squeeze risk: MODERATE

📡 Data Sources 数据来源

Options Flow

NEUTRAL (80%)

Insider Trading

BEARISH (90%)

Smart Money Flow

LEAN BULLISH (75%)

Short Interest

LEAN BEARISH (60%)

📋 Summary 综合摘要

[dark_pool] Short interest: 19.3% of float
[dark_pool] Days to cover: 2.4
[institutional] Institutional ownership: 48.6%
[institutional] Smart money flow: 7 adding / 2 selling / 1 hold
[options_flow] Put/Call volume ratio: 0.8 (bullish)
[options_flow] Total options volume: 41,380 (calls 23,011 / puts 18,369)
[insider] Insider selling: 125,240 shares
[insider] 7 Form 4 filings in last 90 days