SPOK Spok Holdings Inc.

NASDAQ
$10.65

Spok Holdings Inc. (SPOK) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-11.11
8 buyers / 10 sellers
SELLING
Funds compared
18
funds with comparable SPOK positions
12 current holders · 16 prior-quarter holders
Net share change
-145.0K
+374.9K added, -519.9K cut
Position activity
2 new 6 increased 4 reduced 6 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
MARSHALL WACE, LLP Long/Short Sold Out -112.8K -100.0% $1.2M 0.0% 58
Squarepoint Ops LLC Quant Sold Out -12.5K -100.0% $127.8K 0.0% 54
Magnetar Capital Event Quant Sold Out -13.9K -100.0% $142.4K 0.0% 54
CITADEL ADVISORS LLC Quant Increased +165.7K +932.1% $1.7M 0.0% 54
Quadrature Capital Quant Sold Out -11.4K -100.0% $116.4K 0.0% 52
Schonfeld Strategic Advisors Long/Short Quant New +24.5K — $250.4K 0.0% 51
Brevan Howard Capital Management Macro New +14.0K — $143.5K 0.0% 49
Aquatic Capital Management Quant Sold Out -17.3K -100.0% $177.6K 0.0% 48
Point72 Asset Management, L.P. Reduced -70.5K -78.7% $722.1K 0.0% 48
Engineers Gate Quant Sold Out -64.1K -100.0% $656.1K 0.0% 48

Most significant buyers

By move score, not size.

  • CITADEL ADVISORS LLC Increased · +165.7K
  • Schonfeld Strategic Advisors New · +24.5K
  • Brevan Howard Capital Management New · +14.0K
  • Qube Research & Technologies Ltd Increased · +115.6K
  • D. E. Shaw & Co., Inc. Increased · +40.7K

Most significant sellers

By move score, not size.

  • MARSHALL WACE, LLP Sold Out · -112.8K
  • Squarepoint Ops LLC Sold Out · -12.5K
  • Magnetar Capital Sold Out · -13.9K
  • Quadrature Capital Sold Out · -11.4K
  • Aquatic Capital Management Sold Out · -17.3K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
MARSHALL WACE, LLP 2 0 112.8K -112.8K -100.0% 0.0% Sold Out 58
Squarepoint Ops LLC 2 0 12.5K -12.5K -100.0% 0.0% Sold Out 54
Magnetar Capital 2 0 13.9K -13.9K -100.0% 0.0% Sold Out 54
CITADEL ADVISORS LLC 1 183.4K 17.8K +165.7K +932.1% 0.0% Increased 54
Quadrature Capital 3 0 11.4K -11.4K -100.0% 0.0% Sold Out 52
Schonfeld Strategic Advisors 3 24.5K 0 +24.5K — 0.0% New 51
Brevan Howard Capital Management 3 14.0K 0 +14.0K — 0.0% New 49
Aquatic Capital Management 4 0 17.3K -17.3K -100.0% 0.0% Sold Out 48
Point72 Asset Management, L.P. 1 19.1K 89.6K -70.5K -78.7% 0.0% Reduced 48
Engineers Gate 4 0 64.1K -64.1K -100.0% 0.0% Sold Out 48
Qube Research & Technologies Ltd 2 287.6K 172.1K +115.6K +67.2% 0.0% Increased 43
D. E. Shaw & Co., Inc. 1 130.2K 89.5K +40.7K +45.5% 0.0% Increased 38
Trexquant Investment 3 39.2K 128.9K -89.7K -69.6% 0.0% Reduced 37
MILLENNIUM MANAGEMENT LLC 2 22.4K 37.2K -14.8K -39.8% 0.0% Reduced 36
RENAISSANCE TECHNOLOGIES LLC 1 1.1M 1.3M -113.0K -9.0% 0.0% Reduced 32
TWO SIGMA INVESTMENTS, LP 2 23.2K 19.9K +3.3K +16.3% 0.0% Increased 30
Man Group 3 57.7K 48.3K +9.4K +19.4% 0.0% Increased 26
AQR Capital Management 3 45.0K 43.1K +1.9K +4.3% 0.0% Increased 21

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.