RAMBUS INC DEL

Ticker: RMBS CUSIP: 750917106 Class: EQTY

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 47,500 Value ($000) $4,365 Avg Close $98.40 Range $82.51 - $114.55

Q3 2025

Shares 59,000 Value ($000) $6,148 Avg Close $77.09 Range $61.16 - $109.15

Q2 2025

Shares 62,300 Value ($000) $3,988 Avg Close $53.58 Range $40.12 - $64.90

Q1 2025

Shares 72,900 Value ($000) $3,774 Avg Close $58.74 Range $50.01 - $69.15

Q4 2024

Shares 82,500 Value ($000) $4,361 Avg Close $50.98 Range $39.56 - $60.84

Q3 2024

Shares 94,500 Value ($000) $3,990 Avg Close $48.47 Range $37.42 - $67.74

Q2 2024

Shares 103,600 Value ($000) $6,088 Avg Close $57.16 Range $52.52 - $63.31

Q1 2024

Shares 128,200 Value ($000) $7,924 Avg Close $63.29 Range $53.11 - $76.38

Q4 2023

Shares 134,963 Value ($000) $9,211 Avg Close $62.29 Range $48.13 - $71.90

Q3 2023

Shares 166,163 Value ($000) $9,270 Avg Close $56.74 Range $48.51 - $66.22

Q2 2023

Shares 195,363 Value ($000) $12,536 Avg Close $55.06 Range $43.58 - $68.54

Q1 2023

Shares 238,663 Value ($000) $12,234 Avg Close $42.95 Range $34.77 - $51.31

Q4 2022

Shares 238,663 Value ($000) $8,549 Avg Close $33.82 Range $24.81 - $39.34

Q3 2022

Shares 245,563 Value ($000) $6,242 Avg Close $25.00 Range $20.00 - $28.79

Q2 2022

Shares 253,163 Value ($000) $5,440 Avg Close $24.73 Range $20.46 - $32.21

Q1 2022

Shares 263,163 Value ($000) $8,392 Avg Close $27.68 Range $22.83 - $33.75

Q4 2021

Shares 267,963 Value ($000) $7,875 Avg Close $25.43 Range $21.65 - $29.89

Q3 2021

Shares 286,263 Value ($000) $6,355 Avg Close $23.54 Range $22.19 - $25.19

Q2 2021

Shares 295,289 Value ($000) $7,001 Avg Close $20.13 Range $17.95 - $23.97

Q1 2021

Shares 318,048 Value ($000) $6,183 Avg Close $20.08 Range $17.44 - $22.30

Q4 2020

Shares 892,445 Value ($000) $15,582 Avg Close $15.69 Range $13.48 - $18.54

Q3 2020

Shares 893,945 Value ($000) $12,238 Avg Close $14.20 Range $13.08 - $15.61

Q2 2020

Shares 893,945 Value ($000) $13,588 Avg Close $14.09 Range $10.36 - $16.50

Q1 2020

Shares 897,945 Value ($000) $9,967 Avg Close $13.85 Range $9.01 - $16.98

Q4 2019

Shares 925,345 Value ($000) $12,747 Avg Close $13.42 Range $12.45 - $14.83

Q3 2019

Shares 936,045 Value ($000) $12,286 Avg Close $12.54 Range $11.23 - $14.29

Q2 2019

Shares 1,243,245 Value ($000) $14,969 Avg Close $11.46 Range $10.50 - $12.24

Q1 2019

Shares 1,248,545 Value ($000) $13,047 Avg Close $9.60 Range $7.55 - $10.93

Q4 2018

Shares 1,258,845 Value ($000) $9,655 Avg Close $8.69 Range $7.17 - $10.99

Q3 2018

Shares 2,194,554 Value ($000) $23,943 Avg Close $12.17 Range $10.76 - $13.61

Q2 2018

Shares 5,070,894 Value ($000) $63,589 Avg Close $13.52 Range $12.54 - $14.30

Q1 2018

Shares 5,070,894 Value ($000) $68,102 Avg Close $13.39 Range $11.85 - $14.63

Q4 2017

Shares 5,684,527 Value ($000) $80,834 Avg Close $14.38 Range $13.32 - $15.50

Q3 2017

Shares 5,791,390 Value ($000) $77,315 Avg Close $12.85 Range $11.30 - $13.64

Q2 2017

Shares 6,550,028 Value ($000) $74,867 Avg Close $12.28 Range $11.39 - $13.41

Q1 2017

Shares 9,589,497 Value ($000) $126,006 Avg Close $13.14 Range $12.37 - $14.24

Q4 2016

Shares 8,708,272 Value ($000) $119,913 Avg Close $12.95 Range $11.44 - $14.39

Q3 2016

Shares 8,910,472 Value ($000) $111,381 Avg Close $13.21 Range $11.42 - $14.50

Q2 2016

Shares 9,180,972 Value ($000) $110,906 Avg Close $12.19 Range $11.13 - $13.97

Q1 2016

Shares 9,333,022 Value ($000) $128,329 Avg Close $12.40 Range $10.66 - $13.99

Q4 2015

Shares 9,324,322 Value ($000) $108,069 Avg Close $11.54 Range $9.86 - $14.07

Q3 2015

Shares 9,281,622 Value ($000) $109,523 Avg Close $12.99 Range $10.36 - $14.80

Q2 2015

Shares 8,291,622 Value ($000) $120,146 Avg Close $14.29 Range $12.44 - $15.49

Q1 2015

Shares 8,342,272 Value ($000) $104,946 Avg Close $11.76 Range $10.01 - $12.88

Q4 2014

Shares 8,362,372 Value ($000) $92,739 Avg Close $11.33 Range $9.87 - $12.55

Q3 2014

Shares 8,406,522 Value ($000) $104,913 Avg Close $12.62 Range $11.27 - $14.77

Q2 2014

Shares 8,450,122 Value ($000) $120,837 Avg Close $12.36 Range $10.74 - $14.82

Q1 2014

Shares 8,585,583 Value ($000) $92,295 Avg Close $9.38 Range $8.38 - $11.00

Q4 2013

Shares 8,622,322 Value ($000) $81,653 Avg Close $9.01 Range $8.15 - $10.57

Q3 2013

Shares 8,633,522 Value ($000) $81,155 Avg Close $9.16 Range $7.95 - $10.85

Q2 2013

Shares 8,785,322 Value ($000) $75,466 Avg Close $7.45 Range $5.31 - $8.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	47,500	$4,365	$98.40	$82.51 - $114.55
Q3 2025	59,000	$6,148	$77.09	$61.16 - $109.15
Q2 2025	62,300	$3,988	$53.58	$40.12 - $64.90
Q1 2025	72,900	$3,774	$58.74	$50.01 - $69.15
Q4 2024	82,500	$4,361	$50.98	$39.56 - $60.84
Q3 2024	94,500	$3,990	$48.47	$37.42 - $67.74
Q2 2024	103,600	$6,088	$57.16	$52.52 - $63.31
Q1 2024	128,200	$7,924	$63.29	$53.11 - $76.38
Q4 2023	134,963	$9,211	$62.29	$48.13 - $71.90
Q3 2023	166,163	$9,270	$56.74	$48.51 - $66.22
Q2 2023	195,363	$12,536	$55.06	$43.58 - $68.54
Q1 2023	238,663	$12,234	$42.95	$34.77 - $51.31
Q4 2022	238,663	$8,549	$33.82	$24.81 - $39.34
Q3 2022	245,563	$6,242	$25.00	$20.00 - $28.79
Q2 2022	253,163	$5,440	$24.73	$20.46 - $32.21
Q1 2022	263,163	$8,392	$27.68	$22.83 - $33.75
Q4 2021	267,963	$7,875	$25.43	$21.65 - $29.89
Q3 2021	286,263	$6,355	$23.54	$22.19 - $25.19
Q2 2021	295,289	$7,001	$20.13	$17.95 - $23.97
Q1 2021	318,048	$6,183	$20.08	$17.44 - $22.30
Q4 2020	892,445	$15,582	$15.69	$13.48 - $18.54
Q3 2020	893,945	$12,238	$14.20	$13.08 - $15.61
Q2 2020	893,945	$13,588	$14.09	$10.36 - $16.50
Q1 2020	897,945	$9,967	$13.85	$9.01 - $16.98
Q4 2019	925,345	$12,747	$13.42	$12.45 - $14.83
Q3 2019	936,045	$12,286	$12.54	$11.23 - $14.29
Q2 2019	1,243,245	$14,969	$11.46	$10.50 - $12.24
Q1 2019	1,248,545	$13,047	$9.60	$7.55 - $10.93
Q4 2018	1,258,845	$9,655	$8.69	$7.17 - $10.99
Q3 2018	2,194,554	$23,943	$12.17	$10.76 - $13.61
Q2 2018	5,070,894	$63,589	$13.52	$12.54 - $14.30
Q1 2018	5,070,894	$68,102	$13.39	$11.85 - $14.63
Q4 2017	5,684,527	$80,834	$14.38	$13.32 - $15.50
Q3 2017	5,791,390	$77,315	$12.85	$11.30 - $13.64
Q2 2017	6,550,028	$74,867	$12.28	$11.39 - $13.41
Q1 2017	9,589,497	$126,006	$13.14	$12.37 - $14.24
Q4 2016	8,708,272	$119,913	$12.95	$11.44 - $14.39
Q3 2016	8,910,472	$111,381	$13.21	$11.42 - $14.50
Q2 2016	9,180,972	$110,906	$12.19	$11.13 - $13.97
Q1 2016	9,333,022	$128,329	$12.40	$10.66 - $13.99
Q4 2015	9,324,322	$108,069	$11.54	$9.86 - $14.07
Q3 2015	9,281,622	$109,523	$12.99	$10.36 - $14.80
Q2 2015	8,291,622	$120,146	$14.29	$12.44 - $15.49
Q1 2015	8,342,272	$104,946	$11.76	$10.01 - $12.88
Q4 2014	8,362,372	$92,739	$11.33	$9.87 - $12.55
Q3 2014	8,406,522	$104,913	$12.62	$11.27 - $14.77
Q2 2014	8,450,122	$120,837	$12.36	$10.74 - $14.82
Q1 2014	8,585,583	$92,295	$9.38	$8.38 - $11.00
Q4 2013	8,622,322	$81,653	$9.01	$8.15 - $10.57
Q3 2013	8,633,522	$81,155	$9.16	$7.95 - $10.85
Q2 2013	8,785,322	$75,466	$7.45	$5.31 - $8.99