Rambus Inc.
DE ˙ DB ˙ US7509171069
142,95 € ↓ -5,25 (-3,54%)
2026-06-04
DEL PRIS
SecurityDE:RMB / Rambus Inc.
InstitutionHsbc Holdings Plc
Latest Disclosed Ownership6,329 shares
Latest Disclosed Value $ 544,287
Hsbc Holdings Plc ownership in RMB / Rambus Inc.

On April 30, 2026 - Hsbc Holdings Plc filed a 13F-HR form disclosing ownership of 6,329 shares of Rambus Inc. (DE:RMB) valued at $449,232 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 20, 2026 disclosing 20,434 shares of Rambus Inc.. This represents a change in shares of -69.03% during the quarter. The current value of the position is $904,731 USD.

Hsbc Holdings Plc has a history of taking positions in derivatives of the underlying security (RMB) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:RMB / Rambus Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-04-30 2026-03-31 13F RAMBUS INC DEL COM 750917106 6,329 -14,105 -69.03 544 -71.20 0.0000
2026-03-20 2025-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 20,434 7,733 60.88 1,889 43.43 0.0001
2026-03-06 2025-12-31 13F RAMBUS INC DEL COM 750917106 20,434 7,733 60.88 1,889 43.43 0.0001
2025-11-13 2025-09-30 13F RAMBUS INC DEL COM 750917106 12,701 -69,233 -84.50 1,317 -74.73 0.0007
2025-08-13 2025-06-30 13F RAMBUS INC DEL COM 750917106 81,934 59,742 269.21 5,212 358.40 0.0031
2025-05-14 2025-03-31 13F RAMBUS INC DEL COM 750917106 22,192 2,868 14.84 1,138 11.14 0.0007
2025-02-14 2024-12-31 13F RAMBUS INC DEL COM 750917106 19,324 -91,957 -82.63 1,023 -78.21 0.0006
2024-11-14 2024-09-30 13F RAMBUS INC DEL COM 750917106 111,281 78,673 241.27 4,695 145.76 0.0027
2024-08-12 2024-06-30 13F RAMBUS INC DEL COM 750917106 32,608 24,673 310.94 1,910 289.80 0.0012
2024-05-15 2024-03-31 13F RAMBUS INC DEL COM 750917106 7,935 3,501 78.96 490 62.25 0.0003
2024-02-12 2023-12-31 13F RAMBUS INC DEL COM 750917106 4,434 -8,076 -64.56 303 -56.73 0.0003
2023-11-13 2023-09-30 13F RAMBUS INC DEL COM 750917106 12,510 -30,746 -71.08 699 -75.02 0.0007
2023-08-11 2023-06-30 13F RAMBUS INC DEL COM 750917106 43,256 38,828 876.87 2,794 1,136.28 0.0028
2023-05-15 2023-03-31 13F RAMBUS INC DEL COM 750917106 4,428 -21,748 -83.08 226 -75.80 0.0003
2023-02-14 2022-12-31 13F RAMBUS INC DEL COM 750917106 26,176 4,414 20.28 935 65.90 0.0011
2022-11-14 2022-09-30 13F RAMBUS INC DEL COM 750917106 21,762 -8,116 -27.16 563 -13.12 0.0009
2022-08-11 2022-06-30 13F RAMBUS INC DEL COM 750917106 29,878 -2,774 -8.50 648 -38.05 0.0009
2022-05-16 2022-03-31 13F RAMBUS INC DEL COM 750917106 32,652 32,652 1,046 0.0013
2022-02-11 2021-12-31 13F RAMBUS INC DEL COM 750917106 0 -14,376 -100.00 0 -100.00
2021-11-12 2021-09-30 13F RAMBUS INC DEL COM 750917106 14,376 -1,969 -12.05 321 -17.27 0.0003
2021-08-13 2021-06-30 13F RAMBUS INC DEL COM 750917106 16,345 792 5.09 388 28.05 0.0004
2021-05-14 2021-03-31 13F RAMBUS INC DEL COM 750917106 15,553 -1,614 -9.40 303 0.66 0.0004
2021-02-25 2020-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 17,167 17,167 301 0.0004
2021-02-12 2020-12-31 13F RAMBUS INC DEL COM 750917106 17,167 17,167 301 71.4685
2020-05-15 2020-03-31 13F RAMBUS INC DEL COM 750917106 0 -12,729 -100.00 0 -100.00
2020-02-14 2019-12-31 13F RAMBUS INC DEL COM 750917106 12,729 1,250 10.89 175 15.89 0.0003
2019-11-14 2019-09-30 13F RAMBUS INC DEL COM 750917106 11,479 11,479 151 0.0003
2017-05-15 2017-03-31 13F RAMBUS INC DEL COM 750917106 0 -23,188 -100.00 0 -100.00
2017-02-09 2016-12-31 13F RAMBUS INC DEL COM 750917106 23,188 23,188 0.00 319 0.0007
2016-05-13 2016-03-31 13F RAMBUS INC DEL COM 750917106 0 -4,860 -100.00 0 -100.00
2016-02-12 2015-12-31 13F RAMBUS INC DEL COM 750917106 4,860 -5,008 -50.75 57 -50.86 0.0001
2015-11-12 2015-09-30 13F RAMBUS INC DEL COM 750917106 9,868 -64,333 -86.70 116 -89.21 0.0003
2015-08-13 2015-06-30 13F RAMBUS INC DEL COM 750917106 74,201 44,073 146.29 1,075 183.64 0.0022
2015-05-14 2015-03-31 13F RAMBUS INC DEL COM 750917106 30,128 932 3.19 379 16.98 0.0007
2015-02-13 2014-12-31 13F RAMBUS INC DEL COM 750917106 29,196 1,158 4.13 324 -7.43 0.0007
2014-11-18 2014-09-30 13F RAMBUS INC DEL COM 750917106 28,038 -33,963 -54.78 350 -60.50 0.0007
2014-08-14 2014-06-30 13F RAMBUS INC DEL COM 750917106 62,001 21,058 51.43 886 100.91 0.0019
2014-05-14 2014-03-31 13F RAMBUS INC DEL COM 750917106 40,943 29,423 255.41 441 304.59 0.0011
2014-02-14 2013-12-31 13F RAMBUS INC DEL COM 750917106 11,520 -20,500 -64.02 109 -62.93 0.0003
2013-11-14 2013-09-30 13F RAMBUS INC DEL COM 750917106 32,020 20 0.06 294 6.91 0.0008
2013-10-10 2013-06-30 13F/A-1 RAMBUS INC DEL COM 750917106 32,000 20,965 189.99 275 343.55 0.0008
2013-08-14 2013-06-30 13F RAMBUS INC DEL COM 750917106 32,000 275
2013-10-10 2013-03-31 13F/A-1 RAMBUS INC DEL COM 750917106 11,035 -3,965 -26.43 62 -15.07 0.0002
2013-05-22 2013-03-31 13F RAMBUS INC DEL COM 750917106 11,035 62
2013-06-17 2012-12-31 13F/A-1 RAMBUS INC DEL COM 750917106 15,000 5,000 73 0.0003
2013-10-10 2012-12-31 13F/A-2 RAMBUS INC DEL COM 750917106 15,000 5,000 50.00 73 32.73 0.0003
2013-06-21 2012-09-30 13F/A-1 RAMBUS INC DEL COM 750917106 10,000 -100 55 0.0002
2013-10-11 2012-09-30 13F/A-2 RAMBUS INC DEL COM 750917106 10,000 -100 -0.99 55 -5.17 0.0002
2013-10-11 2012-06-30 13F/A-1 RAMBUS INC DEL COM 750917106 10,100 10,100 58 0.0003
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2016-05-13 2016-03-31 13F RAMBUS INC DEL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-12 2015-12-31 13F RAMBUS INC DEL COM Call 72,100 0.00 836 -1.76 n/a n/a n/a
2015-11-12 2015-09-30 13F RAMBUS INC DEL COM Call 72,100 851 n/a n/a n/a
2015-08-13 2015-06-30 13F RAMBUS INC DEL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-05-14 2015-03-31 13F RAMBUS INC DEL COM Call 82,100 32.21 1,035 50.22 n/a n/a n/a
2015-02-13 2014-12-31 13F RAMBUS INC DEL COM Call 62,100 0.00 689 -11.10 n/a n/a n/a
2014-11-18 2014-09-30 13F RAMBUS INC DEL COM Call 62,100 413.22 775 347.98 n/a n/a n/a
2014-08-14 2014-06-30 13F RAMBUS INC DEL COM Call 12,100 -84.13 173 -76.04 n/a n/a n/a
2014-02-14 2013-12-31 13F RAMBUS INC DEL COM Call 76,236 722 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.