INTERACTIVE BROKERS GROUP IN

Ticker: IBKR CUSIP: 45841N107 Class: EQTY

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2025

Shares 660,940 Value ($000) $42,505 Avg Close $66.89 Range $58.88 - $73.26

Q3 2025

Shares 666,757 Value ($000) $45,880 Avg Close $62.79 Range $53.01 - $70.18

Q2 2025

Shares 666,192 Value ($000) $36,914 Avg Close $47.28 Range $32.69 - $55.48

Q1 2025

Shares 128,659 Value ($000) $21,305 Avg Close $49.31 Range $39.14 - $58.82

Q4 2024

Shares 104,447 Value ($000) $18,453 Avg Close $41.85 Range $33.69 - $48.10

Q3 2024

Shares 96,586 Value ($000) $13,460 Avg Close $30.72 Range $25.70 - $34.63

Q2 2024

Shares 99,597 Value ($000) $12,211 Avg Close $29.54 Range $26.42 - $31.96

Q1 2024

Shares 102,059 Value ($000) $11,401 Avg Close $24.63 Range $20.33 - $27.83

Q4 2023

Shares 107,842 Value ($000) $8,940 Avg Close $20.21 Range $17.92 - $22.24

Q3 2023

Shares 113,592 Value ($000) $9,833 Avg Close $21.95 Range $20.01 - $23.60

Q2 2023

Shares 124,124 Value ($000) $10,311 Avg Close $19.44 Range $17.44 - $21.23

Q1 2023

Shares 145,721 Value ($000) $12,031 Avg Close $20.03 Range $17.46 - $22.21

Q4 2022

Shares 147,189 Value ($000) $10,649 Avg Close $18.36 Range $15.40 - $20.01

Q3 2022

Shares 141,732 Value ($000) $9,058 Avg Close $15.12 Range $12.86 - $17.38

Q2 2022

Shares 119,561 Value ($000) $6,577 Avg Close $14.55 Range $12.78 - $16.65

Q1 2022

Shares 109,968 Value ($000) $7,248 Avg Close $16.85 Range $13.94 - $19.79

Q4 2021

Shares 118,761 Value ($000) $9,432 Avg Close $18.18 Range $15.23 - $20.25

Q3 2021

Shares 136,126 Value ($000) $8,486 Avg Close $15.36 Range $14.37 - $16.36

Q2 2021

Shares 136,641 Value ($000) $8,981 Avg Close $16.85 Range $15.38 - $18.89

Q1 2021

Shares 127,630 Value ($000) $9,322 Avg Close $17.53 Range $14.36 - $19.61

Q4 2020

Shares 127,896 Value ($000) $7,791 Avg Close $12.87 Range $11.33 - $15.30

Q3 2020

Shares 125,764 Value ($000) $6,078 Avg Close $12.09 Range $9.98 - $13.03

Q2 2020

Shares 121,305 Value ($000) $5,067 Avg Close $10.11 Range $8.76 - $11.44

Q1 2020

Shares 124,743 Value ($000) $5,385 Avg Close $11.67 Range $8.14 - $14.11

Q4 2019

Shares 119,251 Value ($000) $5,559 Avg Close $11.31 Range $10.72 - $12.50

Q3 2019

Shares 119,099 Value ($000) $6,405 Avg Close $11.96 Range $10.69 - $13.30

Q2 2019

Shares 115,936 Value ($000) $6,284 Avg Close $13.01 Range $11.86 - $14.22

Q1 2019

Shares 116,796 Value ($000) $6,059 Avg Close $12.59 Range $11.61 - $13.91

Q4 2018

Shares 116,450 Value ($000) $6,364 Avg Close $12.75 Range $11.08 - $14.96

Q3 2018

Shares 114,253 Value ($000) $6,319 Avg Close $14.48 Range $13.14 - $15.95

Q2 2018

Shares 108,804 Value ($000) $7,008 Avg Close $17.25 Range $15.13 - $19.13

Q1 2018

Shares 112,906 Value ($000) $7,592 Avg Close $15.75 Range $14.01 - $17.65

Q4 2017

Shares 116,563 Value ($000) $6,902 Avg Close $12.95 Range $10.63 - $14.82

Q3 2017

Shares 116,037 Value ($000) $5,226 Avg Close $9.67 Range $8.58 - $10.70

Q2 2017

Shares 121,587 Value ($000) $4,550 Avg Close $8.40 Range $7.80 - $9.05

Q1 2017

Shares 128,913 Value ($000) $4,476 Avg Close $8.78 Range $8.05 - $9.31

Q4 2016

Shares 134,813 Value ($000) $4,922 Avg Close $8.56 Range $7.51 - $9.35

Q3 2016

Shares 138,313 Value ($000) $4,878 Avg Close $8.30 Range $7.88 - $8.76

Q2 2016

Shares 137,113 Value ($000) $4,854 Avg Close $8.92 Range $7.90 - $9.67

Q1 2016

Shares 125,434 Value ($000) $4,932 Avg Close $8.23 Range $6.87 - $10.05

Q4 2015

Shares 109,821 Value ($000) $4,788 Avg Close $9.71 Range $8.53 - $10.45

Q3 2015

Shares 108,007 Value ($000) $4,263 Avg Close $9.55 Range $8.25 - $10.65

Q2 2015

Shares 105,144 Value ($000) $4,370 Avg Close $8.40 Range $7.45 - $9.84

Q1 2015

Shares 101,936 Value ($000) $3,468 Avg Close $7.33 Range $5.89 - $7.99

Q4 2014

Shares 103,705 Value ($000) $3,024 Avg Close $6.15 Range $5.28 - $6.88

Q3 2014

Shares 102,664 Value ($000) $2,561 Avg Close $5.45 Range $5.01 - $6.12

Q2 2014

Shares 98,472 Value ($000) $2,293 Avg Close $5.24 Range $4.63 - $5.56

Q1 2014

Shares 85,072 Value ($000) $1,844 Avg Close $5.03 Range $4.67 - $5.63

Q4 2013

Shares 84,772 Value ($000) $2,063 Avg Close $5.05 Range $4.23 - $5.67

Q3 2013

Shares 84,172 Value ($000) $1,580 Avg Close $3.86 Range $3.57 - $4.28

Q2 2013

Shares 81,577 Value ($000) $1,303 Avg Close $3.45 Range $3.06 - $3.76

Q1 2013

Shares 69,282 Value ($000) $1,033 Avg Close $3.23 Range $3.01 - $3.36

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	660,940	$42,505	$66.89	$58.88 - $73.26
Q3 2025	666,757	$45,880	$62.79	$53.01 - $70.18
Q2 2025	666,192	$36,914	$47.28	$32.69 - $55.48
Q1 2025	128,659	$21,305	$49.31	$39.14 - $58.82
Q4 2024	104,447	$18,453	$41.85	$33.69 - $48.10
Q3 2024	96,586	$13,460	$30.72	$25.70 - $34.63
Q2 2024	99,597	$12,211	$29.54	$26.42 - $31.96
Q1 2024	102,059	$11,401	$24.63	$20.33 - $27.83
Q4 2023	107,842	$8,940	$20.21	$17.92 - $22.24
Q3 2023	113,592	$9,833	$21.95	$20.01 - $23.60
Q2 2023	124,124	$10,311	$19.44	$17.44 - $21.23
Q1 2023	145,721	$12,031	$20.03	$17.46 - $22.21
Q4 2022	147,189	$10,649	$18.36	$15.40 - $20.01
Q3 2022	141,732	$9,058	$15.12	$12.86 - $17.38
Q2 2022	119,561	$6,577	$14.55	$12.78 - $16.65
Q1 2022	109,968	$7,248	$16.85	$13.94 - $19.79
Q4 2021	118,761	$9,432	$18.18	$15.23 - $20.25
Q3 2021	136,126	$8,486	$15.36	$14.37 - $16.36
Q2 2021	136,641	$8,981	$16.85	$15.38 - $18.89
Q1 2021	127,630	$9,322	$17.53	$14.36 - $19.61
Q4 2020	127,896	$7,791	$12.87	$11.33 - $15.30
Q3 2020	125,764	$6,078	$12.09	$9.98 - $13.03
Q2 2020	121,305	$5,067	$10.11	$8.76 - $11.44
Q1 2020	124,743	$5,385	$11.67	$8.14 - $14.11
Q4 2019	119,251	$5,559	$11.31	$10.72 - $12.50
Q3 2019	119,099	$6,405	$11.96	$10.69 - $13.30
Q2 2019	115,936	$6,284	$13.01	$11.86 - $14.22
Q1 2019	116,796	$6,059	$12.59	$11.61 - $13.91
Q4 2018	116,450	$6,364	$12.75	$11.08 - $14.96
Q3 2018	114,253	$6,319	$14.48	$13.14 - $15.95
Q2 2018	108,804	$7,008	$17.25	$15.13 - $19.13
Q1 2018	112,906	$7,592	$15.75	$14.01 - $17.65
Q4 2017	116,563	$6,902	$12.95	$10.63 - $14.82
Q3 2017	116,037	$5,226	$9.67	$8.58 - $10.70
Q2 2017	121,587	$4,550	$8.40	$7.80 - $9.05
Q1 2017	128,913	$4,476	$8.78	$8.05 - $9.31
Q4 2016	134,813	$4,922	$8.56	$7.51 - $9.35
Q3 2016	138,313	$4,878	$8.30	$7.88 - $8.76
Q2 2016	137,113	$4,854	$8.92	$7.90 - $9.67
Q1 2016	125,434	$4,932	$8.23	$6.87 - $10.05
Q4 2015	109,821	$4,788	$9.71	$8.53 - $10.45
Q3 2015	108,007	$4,263	$9.55	$8.25 - $10.65
Q2 2015	105,144	$4,370	$8.40	$7.45 - $9.84
Q1 2015	101,936	$3,468	$7.33	$5.89 - $7.99
Q4 2014	103,705	$3,024	$6.15	$5.28 - $6.88
Q3 2014	102,664	$2,561	$5.45	$5.01 - $6.12
Q2 2014	98,472	$2,293	$5.24	$4.63 - $5.56
Q1 2014	85,072	$1,844	$5.03	$4.67 - $5.63
Q4 2013	84,772	$2,063	$5.05	$4.23 - $5.67
Q3 2013	84,172	$1,580	$3.86	$3.57 - $4.28
Q2 2013	81,577	$1,303	$3.45	$3.06 - $3.76
Q1 2013	69,282	$1,033	$3.23	$3.01 - $3.36