Spok Holdings, Inc: which funds bought and sold

Institutions that bought and sold Spok Holdings shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 78 institutions that filed 13F reports for both quarters added to or opened positions in Spok Holdings, and 61 cut or closed them. Together they added a net 355K shares, +3.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 40K shares (+1.6%); index fund managers were net buyers of 164K shares (+3.9%). 20 opened a new position and 22 sold out entirely.

Bought, Q2 2026 78 institutions, 20 of them new holders Sold, Q2 2026 61 institutions, 22 of them sold out

Net change, all compared +355K shares (+3.4%)

Net change, active managers +40K shares (+1.6%), 15 bought, 11 sold

Buyers versus sellers

institutions compared, 153

78 bought 14 61 sold

Active managers and hedge funds 15 bought · 11 sold · +40K

Index fund managers 10 bought · 0 sold · +164K

Other institutions 53 bought · 50 sold · +150K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Citadel Advisors LLC Hedge fund	+166K +932.1%	183K	$1.9M
Qube Research & Technologies Ltd Hedge fund	+116K +67.2%	288K	$2.9M
United Capital Financial Advisors, LLC	+90K +86.0%	195K	$2M
FMR LLC Active manager	+74K +493.3%	89K	$913,005
Gsa Capital Partners LLP	+64K +74.9%	150K	$1.5M
Goldman Sachs Group Inc	+62K +28.4%	282K	$2.9M
Geode Capital Management, LLC Index funds	+50K +9.2%	596K	$6.1M
Atom Investors LP	+44K New position	44K	$453,519
Jacobs Levy Equity Management, Inc Active manager	+44K +37.2%	160K	$1.6M
Blackrock, Inc. Index funds	+43K +2.6%	1.7M	$17.6M
D. E. Shaw & Co., Inc. Hedge fund	+41K +45.5%	130K	$1.3M
Quantinno Capital Management LP	+37K +143.2%	64K	$651,270
Russell Investments Group, Ltd.	+31K +394.2%	39K	$397,316
Guggenheim Capital LLC	+27K New position	27K	$276,746
Schonfeld Strategic Advisors LLC Hedge fund	+24K New position	24K	$250,366
Ameriprise Financial Inc	+22K +131.1%	39K	$399,503
Bank Of New York Mellon Corp	+16K +7.5%	234K	$2.4M
Mercer Global Advisors Inc	+15K New position	15K	$156,980
Panagora Asset Management Inc Active manager	+15K +18.8%	93K	$952,627
Victory Capital Management Inc Active manager	+15K +34.3%	58K	$588,902

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Citadel Advisors LLC Hedge fund	+166K +932.1%	183K	$1.9M
Qube Research & Technologies Ltd Hedge fund	+116K +67.2%	288K	$2.9M
FMR LLC Active manager	+74K +493.3%	89K	$913,005
Jacobs Levy Equity Management, Inc Active manager	+44K +37.2%	160K	$1.6M
D. E. Shaw & Co., Inc. Hedge fund	+41K +45.5%	130K	$1.3M
Schonfeld Strategic Advisors LLC Hedge fund	+24K New position	24K	$250,366
Panagora Asset Management Inc Active manager	+15K +18.8%	93K	$952,627
Victory Capital Management Inc Active manager	+15K +34.3%	58K	$588,902
Brevan Howard Capital Management LP Hedge fund	+14K New position	14K	$143,462
Los Angeles Capital Management LLC Active manager	+11K New position	11K	$111,667

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Renaissance Technologies LLC Hedge fund	−113K −9.0%	1.1M	$11.8M
Marshall Wace, LLP Hedge fund	−113K Sold out	0	—
Trexquant Investment LP Hedge fund	−90K −69.6%	39K	$401,244
Jane Street Group, LLC	−71K −82.4%	15K	$155,576
Point72 Asset Management, L.P. Hedge fund	−71K −78.7%	19K	$195,635
Engineers Gate Manager LP Hedge fund	−64K Sold out	0	—
Hightower Advisors, LLC	−42K −11.0%	340K	$3.5M
Dynamic Technology Lab Private Ltd	−38K Sold out	0	—
Connor, Clark & Lunn Investment Management Ltd.	−37K −25.8%	107K	$1.1M
North Star Investment Management Corp.	−32K −26.2%	90K	$921,600
HSBC Holdings PLC	−29K −71.0%	12K	$124,518
Nuveen, LLC	−24K −32.6%	49K	$505,938
Numerai Gp LLC	−23K −33.0%	46K	$473,324
State Of Wisconsin Investment Board	−20K Sold out	0	—
Aquatic Capital Management LLC	−17K Sold out	0	—
Millennium Management LLC Hedge fund	−15K −39.8%	22K	$229,171
Magnetar Financial LLC Hedge fund	−14K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−12K Sold out	0	—
Brady Martz Wealth Solutions, LLC	−12K Sold out	0	—
Focus Partners Advisor Solutions, LLC	−12K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Renaissance Technologies LLC Hedge fund	−113K −9.0%	1.1M	$11.8M
Marshall Wace, LLP Hedge fund	−113K Sold out	0	—
Trexquant Investment LP Hedge fund	−90K −69.6%	39K	$401,244
Point72 Asset Management, L.P. Hedge fund	−71K −78.7%	19K	$195,635
Engineers Gate Manager LP Hedge fund	−64K Sold out	0	—
Millennium Management LLC Hedge fund	−15K −39.8%	22K	$229,171
Magnetar Financial LLC Hedge fund	−14K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−12K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−11K Sold out	0	—
American Century Companies Inc Active manager	−878 −2.0%	42K	$435,098

New positions

largest by value

Institution	Shares	Value June 30, 2026
Atom Investors LP	44K	$453,519
Guggenheim Capital LLC	27K	$276,746
Schonfeld Strategic Advisors LLCHedge fund	24K	$250,366
Mercer Global Advisors Inc	15K	$156,980
Brevan Howard Capital Management LPHedge fund	14K	$143,462
Cetera Investment Advisers	14K	$142,323
Amundi	12K	$125,358
Vanguard Personalized Indexing Management, LLCIndex funds	12K	$124,211
Los Angeles Capital Management LLCActive manager	11K	$111,667
Ifg Advisory, LLC	2,231	$22,845

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Marshall Wace, LLPHedge fund	113K	$1.2M
Engineers Gate Manager LPHedge fund	64K	$698,341
Dynamic Technology Lab Private Ltd	38K	$409,230
State Of Wisconsin Investment Board	20K	$221,270
Aquatic Capital Management LLC	17K	$189,028
Magnetar Financial LLCHedge fund	14K	$151,553
Squarepoint Ops LLCHedge fund	12K	$136,043
Brady Martz Wealth Solutions, LLC	12K	$133,198
Focus Partners Advisor Solutions, LLC	12K	$132,010
Quadrature Capital LtdHedge fund	11K	$123,900

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 132
Ten largest holders: 61.9%
Index fund managers: 40.7%
Active managers and hedge funds: 23.7%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	15	11	3	5	+40K	+1.6%
Index fund managers	10	0	1	0	+164K	+3.9%
Other institutions	53	50	16	17	+150K	+4.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Spok Holdings.

Only managers that filed a holdings report for both quarters are compared (153 here). 6 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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