Citadel Advisors
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Citadel Advisors’s Spok Holdings SPOK Stock Holding History

Citadel Advisors’s Portfolio SPOK Stock Details SPOK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-12,200
Closed -$161K – 14161
2025
Q4 		$161K Buy
+12,200
New +$173K ﹤0.01% 11234
2025
Q2 		– Sell
-16,000
Closed -$263K – 14929
2025
Q1 		$263K Buy
16,000
+1,100
+7% +$17.9K ﹤0.01% 9872
2024
Q4 		$239K Buy
14,900
+2,800
+23% +$44.3K ﹤0.01% 10118
2024
Q3 		$182K Buy
12,100
+2,600
+27% +$39.5K ﹤0.01% 10297
2024
Q2 		$141K Sell
9,500
-3,100
-25% -$46.8K ﹤0.01% 10439
2024
Q1 		$201K Sell
12,600
-2,900
-19% -$47.7K ﹤0.01% 10307
2023
Q4 		$240K Buy
15,500
+3,700
+31% +$56.9K ﹤0.01% 9596
2023
Q3 		$168K Buy
11,800
+4,300
+57% +$57.7K ﹤0.01% 10180
2023
Q2 		$99.7K Buy
7,500
+1,800
+32% +$22.6K ﹤0.01% 10952
2023
Q1 		$57.7K Sell
5,700
-400
-7% -$3.65K ﹤0.01% 11977
2022
Q4 		$50K Sell
6,100
-30,100
-83% -$244K ﹤0.01% 12142
2022
Q3 		$277K Buy
+36,200
New +$251K ﹤0.01% 9747
2022
Q2 		– Sell
-15,000
Closed -$120K – 14041
2022
Q1 		$120K Buy
+15,000
New +$136K ﹤0.01% 12089

Other funds holding SPOK

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $94.2B AUM 21.24% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return

Citadel Advisors's SPOK Position: Q1 2026 in Review

Citadel Advisors reduced its Spok Holdings (SPOK) stake by 64% in Q1 2026, selling an estimated $406K and leaving 17,775 shares worth $194K. The position accounts for ﹤0.01% of the portfolio, ranked #11444.

Citadel Advisors first reported a position in SPOK in Q2 2013 and has held it in 44 quarters since. The position peaked at $2.54M in Q1 2025. 139 funds tracked by Wall St. Rank hold SPOK as of Q1 2026.

  • Citadel Advisors held 17,775 shares of Spok Holdings worth $194K as of Q1 2026.
  • Citadel Advisors sold 31,917 Spok Holdings shares in Q1 2026, an estimated $406K.
  • Spok Holdings made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #11444 holding.
  • Citadel Advisors first reported a position in Spok Holdings in Q2 2013 and has held it in 44 quarters since.
  • Citadel Advisors's Spok Holdings position peaked at $2.54M in Q1 2025.
  • 139 funds tracked by Wall St. Rank held Spok Holdings as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.