California State Teachers Retirement System (CalSTRS)
RBBN icon

California State Teachers Retirement System (CalSTRS)’s Ribbon Communications RBBN Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio RBBN Stock Details RBBN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$3.02K Sell
1,291
-3,784
-75% -$9.99K ﹤0.01% 2759
2026
Q1 		$10.8K Sell
5,075
-83,377
-94% -$200K ﹤0.01% 2658
2025
Q4 		$255K Sell
88,452
-73
-0.1% -$236 ﹤0.01% 2218
2025
Q3 		$336K Sell
88,525
-981
-1% -$3.85K ﹤0.01% 2191
2025
Q2 		$359K Hold
89,506
– – ﹤0.01% 2170
2025
Q1 		$351K Hold
89,506
– – ﹤0.01% 2192
2024
Q4 		$372K Sell
89,506
-538
-0.6% -$2.03K ﹤0.01% 2232
2024
Q3 		$293K Sell
90,044
-2,116
-2% -$6.87K ﹤0.01% 2306
2024
Q2 		$303K Sell
92,160
-1,587
-2% -$4.83K ﹤0.01% 2295
2024
Q1 		$300K Sell
93,747
-4,466
-5% -$13.6K ﹤0.01% 2348
2023
Q4 		$285K Sell
98,213
-4,124
-4% -$9.29K ﹤0.01% 2398
2023
Q3 		$274K Sell
102,337
-8,755
-8% -$25.6K ﹤0.01% 2444
2023
Q2 		$310K Buy
111,092
+17,746
+19% +$49.2K ﹤0.01% 2470
2023
Q1 		$319K Sell
93,346
-935
-1% -$3.42K ﹤0.01% 2476
2022
Q4 		$263K Buy
94,281
+1,010
+1% +$2.62K ﹤0.01% 2564
2022
Q3 		$207K Sell
93,271
-2,602
-3% -$8.24K ﹤0.01% 2632
2022
Q2 		$291K Sell
95,873
-15,915
-14% -$48.1K ﹤0.01% 2573
2022
Q1 		$345K Sell
111,788
-7,437
-6% -$30.5K ﹤0.01% 2516
2021
Q4 		$721K Buy
119,225
+3,135
+3% +$18.6K ﹤0.01% 2346
2021
Q3 		$694K Buy
116,090
+19,295
+20% +$130K ﹤0.01% 2346
2021
Q2 		$737K Sell
96,795
-5,987
-6% -$45.8K ﹤0.01% 2409
2021
Q1 		$844K Sell
102,782
-2,138
-2% -$17.7K ﹤0.01% 2248
2020
Q4 		$688K Buy
104,920
+3,038
+3% +$16K ﹤0.01% 2252
2020
Q3 		$394K Buy
101,882
+2,483
+2% +$10.5K ﹤0.01% 2406
2020
Q2 		$391K Buy
99,399
+2,750
+3% +$9.99K ﹤0.01% 2381
2020
Q1 		$293K Buy
96,649
+1,062
+1% +$3.19K ﹤0.01% 2359
2019
Q4 		$296K Buy
95,587
+3,704
+4% +$14.7K ﹤0.01% 2620
2019
Q3 		$537K Hold
91,883
– – ﹤0.01% 2266
2019
Q2 		$449K Buy
91,883
+9,288
+11% +$45.4K ﹤0.01% 2421
2019
Q1 		$425K Sell
82,595
-3,277
-4% -$17.5K ﹤0.01% 2397
2018
Q4 		$414K Buy
85,872
+4,669
+6% +$27.1K ﹤0.01% 2396
2018
Q3 		$555K Buy
81,203
+533
+0.7% +$3.79K ﹤0.01% 2396
2018
Q2 		$574K Buy
80,670
+8,871
+12% +$52K ﹤0.01% 2379
2018
Q1 		$366K Sell
71,799
-3,524
-5% -$22.8K ﹤0.01% 2526
2017
Q4 		$582K Sell
75,323
-1,400
-2% -$10.7K ﹤0.01% 2327
2017
Q3 		$587K Sell
76,723
-7,427
-9% -$53.1K ﹤0.01% 2336
2017
Q2 		$626K Sell
84,150
-9,800
-10% -$72.2K ﹤0.01% 2349
2017
Q1 		$619K Sell
93,950
-4,300
-4% -$27.2K ﹤0.01% 2366
2016
Q4 		$619K Sell
98,250
-2,500
-2% -$16.4K ﹤0.01% 2403
2016
Q3 		$784K Buy
100,750
+700
+0.7% +$6.12K ﹤0.01% 2240
2016
Q2 		$869K Sell
100,050
-4,661
-4% -$38.8K ﹤0.01% 2122
2016
Q1 		$788K Buy
104,711
+13,108
+14% +$87.6K ﹤0.01% 2155
2015
Q4 		$653K Buy
91,603
+1,600
+2% +$10.7K ﹤0.01% 2251
2015
Q3 		$515K Sell
90,003
-300
-0.3% -$2.02K ﹤0.01% 2404
2015
Q2 		$625K Buy
90,303
+637
+0.7% +$5K ﹤0.01% 2420
2015
Q1 		$707K Sell
89,666
-1,560
-2% -$25.7K ﹤0.01% 2237
2014
Q4 		$1.81M Buy
91,226
+387
+0.4% +$6.85K ﹤0.01% 1669
2014
Q3 		$1.55M Buy
90,839
+1,096
+1% +$20.9K ﹤0.01% 1722
2014
Q2 		$1.61M Buy
89,743
+20,380
+29% +$345K ﹤0.01% 1754
2014
Q1 		$1.17M Sell
69,363
-8,760
-11% -$146K ﹤0.01% 1899
2013
Q4 		$1.23M Buy
78,123
+500
+0.6% +$7.72K ﹤0.01% 1860
2013
Q3 		$1.31M Buy
77,623
+2,427
+3% +$41.2K ﹤0.01% 1769
2013
Q2 		$1.13M Buy
+75,196
New +$1M ﹤0.01% 1776

Other funds holding RBBN

JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
RA
Royce & Associates New York $12.4B AUM 64.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
PCMI
Paradigm Capital Management Inc Albany, New York $3.67B AUM 121.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Connor, Clark & Lunn Investment Management (CC&L)
Connor, Clark & Lunn Investment Management (CC&L) Vancouver, British Columbia, Canada $52.8B AUM 58.98% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s RBBN Position: Q2 2026 in Review

California State Teachers Retirement System (CalSTRS) reduced its Ribbon Communications (RBBN) stake by 75% in Q2 2026, selling an estimated $9.99K and leaving 1,291 shares worth $3.02K. The position accounts for ﹤0.01% of the portfolio, ranked #2759.

California State Teachers Retirement System (CalSTRS) first reported a position in RBBN in Q2 2013 and has held it in 53 quarters since. The position peaked at $1.81M in Q4 2014. 160 funds tracked by Wall St. Rank hold RBBN as of Q2 2026.

  • California State Teachers Retirement System (CalSTRS) held 1,291 shares of Ribbon Communications worth $3.02K as of Q2 2026.
  • California State Teachers Retirement System (CalSTRS) sold 3,784 Ribbon Communications shares in Q2 2026, an estimated $9.99K.
  • Ribbon Communications made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q2 2026, its #2759 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Ribbon Communications in Q2 2013 and has held it in 53 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Ribbon Communications position peaked at $1.81M in Q4 2014.
  • 160 funds tracked by Wall St. Rank held Ribbon Communications as of Q2 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q2 2026, filed 24 Aug 2026.