Whale Activity Tracker

RMBS

Rambus Inc.
2026-05-31 06:33
$145.46 -1.73% $15.7B
STRONG BUY SIGNAL
Whales are aggressively accumulating RMBS. Multiple signals confirm institutional conviction. Insiders are net buyers (464,680 shares bought vs 125,474 sold) — bullish conviction from management. Strong institutional ownership at 99.2% with 7 of 10 top holders actively accumulating this quarter.
Action Plan
Options Flow
期权
BULLISH
0.25
Insider
内部交易
BULLISH
Net Buy
Smart Money
机构流向
LEAN BULLISH
70% accum
Short Interest
做空
LEAN BEARISH
9.6%
STRONG ACCUMULATION
7.5/10
Whale Activity Rating
Distribution Neutral Accumulation
Options Flow: BULLISH
Insider: BULLISH
Institutional: LEAN BULLISH
Dark Pool: LEAN BEARISH
4/4 sources | Confidence: 76%
📈 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)
0.25
BULLISH
CALL VOLUME
10,379
PUT VOLUME
2,643
TOTAL VOLUME
13,022
UNUSUAL STRIKES
6
Unusual Strikes — Vol/OI > 3x (2C / 4P)
TypeStrikeExpiryVolOIRatio
CALL$1602026-06-188,57126432.5x
CALL$2202026-08-2120120.0x
PUT$1352026-06-181,2077416.3x
PUT$1302027-01-1550105.0x
PUT$1102026-07-173083.8x
PUT$1402026-08-211033.3x
High Volume Contracts — Vol > 500 (2 contracts)
TypeStrikeExpiryVolume
CALL$1602026-06-188,571
PUT$1352026-06-181,207
P/C OI RATIO
0.36
TOTAL OI
35,938
CALL OI
26,336
PUT OI
9,602
👤 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.
79% BUY
21% SELL
SHARES BOUGHT (6m)
464,680
SHARES SOLD (6m)
125,474
NET INSIDER FLOW
+339,206
FORM 4 FILINGS (90d)
24
Recent Insider Transactions (0 buys / 8 sells / 2 grants)
TypeInsiderSharesDate
SELLQUANFENG DONG5,0002026-05-26
SELLFAN XIANZHI SEAN37,9142026-05-26
SELLSHINN JOHN1,0002026-05-22
SELLSAYINER NECIP9,8242026-05-08
SELLLAUB STEVEN A1,5002026-05-07
GRANTGAGNEJA SUMEET41,3202026-05-01
SELLRAO MEERA P.2,9722026-04-24
SELLRAO MEERA P.8,5382026-04-14
SELLSERAPHIN LUC5,4262026-04-02
GRANTRAO MEERA P.2,2232026-04-01
🏦 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
99.2%
ACCUMULATION vs DISTRIBUTION
70% ACCUMULATING
30% DISTRIBUTING
NET SHARES FLOW
+10,487,876
FLOW SCORE
+0.43
ADDING
7
SELLING
1
Institutional Position Changes (QoQ)
ActionInstitution% HeldQoQ ΔShares Δ
★ NEW POSITIONVanguard Portfolio Management LLC6.14%NEW+3,322,160
★ NEW POSITIONVanguard Capital Management LLC4.46%NEW+2,413,927
★ NEW POSITIONFMR, LLC3.07%NEW+1,731,433
★ NEW POSITIONT. Rowe Price Investment Management, Inc.2.21%NEW+1,703,174
▲▲ HEAVY BUYInvesco Ltd.6.01%+56.6%+2,350,278
▲▲ HEAVY BUYEdgepoint Investment Group Inc.1.80%+38.5%+541,023
▲ ADDINGGeode Capital Management, LLC2.89%+9.9%+281,719
▬ HOLDState Street Corporation4.04%+2.9%+122,020
▬ HOLDBlackrock Inc.15.08%+0.2%+30,921
▼▼ HEAVY SELLPrice (T.Rowe) Associates Inc3.12%-37.3%-2,008,779
ETF & Mutual Fund Flow (0 adding / 0 selling)
ActionFundQoQ ΔShares Δ
▬ HOLDiShares Trust-iShares Core S&P Mid-Cap ETF+2.0%+72,349
▬ HOLDVANGUARD INDEX FUNDS-Vanguard Total Stock Mar+0.2%+6,428
▬ HOLDiShares Trust-iShares Russell 2000 ETF+0.6%+15,753
▬ HOLDVANGUARD INDEX FUNDS-Vanguard Small-Cap Index-4.2%-107,364
▬ HOLDiShares Trust-iShares Semiconductor ETF+3.4%+65,309
▬ HOLDVANGUARD WORLD FUND-Vanguard Information Tech+2.5%+40,118
▬ HOLDVANGUARD INDEX FUNDS-Vanguard Small-Cap Growt-3.4%-48,803
▬ HOLDT. ROWE PRICE QUANTITATIVE Mgmt Fd.S, INC.-T.-3.2%-40,560
▬ HOLDVANGUARD INDEX FUNDS-Vanguard Extended Market+0.7%+8,293
▬ HOLDFidelity Salem Street Trust-Fidelity Small Ca+1.1%+11,393
🕶 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
9.6%
DAYS TO COVER
2.7
SI CHANGE (MoM)
↑ 12.9%
SQUEEZE RISK
LOW
SHARES SHORT
7,632,626
PRIOR MONTH
6,763,258
FLOAT SHARES
107,304,312
AVG VOLUME
2,308,953
📡 Data Sources 数据来源
Options Flow
BULLISH (80%)
Insider Trading
BULLISH (90%)
Smart Money Flow
LEAN BULLISH (75%)
Short Interest
LEAN BEARISH (60%)
📋 Summary 综合摘要