Spok Holdings, Inc.
US ˙ NasdaqGS ˙ US84863T1060

SecuritySPOK / Spok Holdings, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership736,997 shares
Ownership 3.70%
Dimensional Fund Advisors Lp ownership in SPOK / Spok Holdings, Inc.

2024-02-09 - Dimensional Fund Advisors Lp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 736,997 shares of Spok Holdings, Inc. (US:SPOK). This represents 3.7 percent ownership of the company. In their previous filing dated 2023-02-10 , Dimensional Fund Advisors Lp had reported owning 1,061,440 shares, indicating a decrease of -30.57 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2024-02-09 2024-02-09 13G/A 1,061,440 736,997 -30.57 3.70 -31.48
2023-02-10 2023-02-10 13G/A 1,309,236 1,061,440 -18.93 5.40 -19.40
2022-02-08 2022-02-08 13G/A 1,536,002 1,309,236 -14.76 6.70 -17.28
2021-02-12 2021-02-12 13G/A 1,593,837 1,536,002 -3.63 8.10 -4.14
2020-02-12 2020-02-12 13G/A 1,626,941 1,593,837 -2.03 8.45 1.08
2019-02-08 2019-02-08 13G/A 1,683,661 1,626,941 -3.37 8.36 -0.83
2018-02-09 2018-02-09 13G/A 1,486,593 1,683,661 13.26 8.43 16.44
2017-02-09 2017-02-09 13G 1,247,980 1,486,593 19.12 7.24 21.89
2016-02-09 2016-02-09 13G 1,247,980 5.94

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F SPOK HLDGS COM 84863T106 715,869 12,043 1.71 7,804 -15.94 0.0003
2026-02-12 2025-12-31 13F SPOK HLDGS COM 84863T106 703,826 -15,224 -2.12 9,284 -25.16 0.0019
2025-11-12 2025-09-30 13F SPOK HLDGS COM 84863T106 719,050 8,160 1.15 12,404 -1.31 0.0027
2025-08-12 2025-06-30 13F SPOK HLDGS COM 84863T106 710,890 11,327 1.62 12,568 9.28 0.0029
2025-05-13 2025-03-31 13F SPOK HLDGS COM 84863T106 699,563 -8,285 -1.17 11,501 1.23 0.0029
2025-02-13 2024-12-31 13F SPOK HLDGS COM 84863T106 707,848 1,123 0.16 11,361 6.74 0.0027
2024-11-07 2024-09-30 13F SPOK HLDGS COM 84863T106 706,725 -1,307 -0.18 10,643 1.51 0.0026
2024-08-09 2024-06-30 13F SPOK HLDGS COM 84863T106 708,032 -6,601 -0.92 10,486 -8.01 0.0027
2024-05-10 2024-03-31 13F SPOK HLDGS COM 84863T106 714,633 -22,364 -3.03 11,398 -0.09 0.0031
2024-02-07 2023-12-31 13F SPOK HLDGS COM 84863T106 736,997 -21,728 -2.86 11,409 5.37 0.0033
2023-11-09 2023-09-30 13F SPOK HLDGS COM 84863T106 758,725 -55,819 -6.85 10,827 0.02 0.0036
2023-08-09 2023-06-30 13F SPOK HLDGS COM 84863T106 814,544 -42,935 -5.01 10,825 24.63 0.0035
2023-05-12 2023-03-31 13F SPOK HLDGS COM 84863T106 857,479 -203,961 -19.22 8,686 108,475.00 0.0029
2023-02-09 2022-12-31 13F SPOK HLDGS COM 84863T106 1,061,440 -54,104 -4.85 9 -99.91 0.0026
2022-11-10 2022-09-30 13F SPOK HLDGS COM 84863T106 1,115,544 -164,464 -12.85 8,521 5.65 0.0033
2022-08-12 2022-06-30 13F SPOK HLDGS COM 84863T106 1,280,008 -29,228 -2.23 8,065 -22.81 0.0029
2022-05-13 2022-03-31 13F SPOK HLDGS COM 84863T106 1,309,236 0 0.00 10,448 -14.47 0.0032
2022-02-09 2021-12-31 13F SPOK HLDGS COM 84863T106 1,309,236 -19,362 -1.46 12,215 -10.04 0.0037
2021-11-12 2021-09-30 13F SPOK HLDGS COM 84863T106 1,328,598 -105,528 -7.36 13,578 -1.58 0.0044
2021-08-12 2021-06-30 13F SPOK HLDGS COM 84863T106 1,434,126 -57,068 -3.83 13,796 -11.81 0.0044
2021-05-14 2021-03-31 13F SPOK HLDGS COM 84863T106 1,491,194 -44,808 -2.92 15,643 -8.50 0.0052
2021-03-08 2020-12-31 13F/A-2 SPOK HLDGS COM 84863T106 1,536,002 -20,893 -1.34 17,096 15.47 0.0062
2021-02-11 2020-12-31 13F SPOK HLDGS COM 84863T106 1,536,002 -20,893 17,096 6,174.1665
2020-11-12 2020-09-30 13F SPOK HLDGS COM 84863T106 1,556,895 -8,551 -0.55 14,806 1.15 0.0063
2020-08-13 2020-06-30 13F SPOK HLDGS COM 84863T106 1,565,446 -25,191 -1.58 14,637 -13.92 0.0064
2020-05-14 2020-03-31 13F SPOK HLDGS COM 84863T106 1,590,637 -3,200 -0.20 17,004 -12.77 0.0089
2020-02-14 2019-12-31 13F SPOK HLDGS COM 84863T106 1,593,837 -22,369 -1.38 19,493 1.01 0.0071
2019-11-12 2019-09-30 13F SPOK HLDGS COM 84863T106 1,616,206 -6,594 -0.41 19,298 -20.93 0.0075
2019-08-13 2019-06-30 13F SPOK HLDGS COM 84863T106 1,622,800 2,013 0.12 24,407 10.56 0.0095
2019-08-12 2019-03-31 13F/A-2 SPOK HLDGS COM 84863T106 1,620,787 -6,154 -0.38 22,075 2.33 0.0088
2019-05-10 2019-03-31 13F SPOK HLDGS COM 84863T106 1,620,787 -6,154 22,075
2019-02-26 2018-12-31 13F/A-1 SPOK HLDGS COM 84863T106 1,626,941 -17,943 -1.09 21,573 -14.84 0.0098
2019-02-13 2018-12-31 13F SPOK HLDGS COM 84863T106 1,626,941 -17,943 21,573
2018-11-13 2018-09-30 13F SPOK HLDGS COM 84863T106 1,644,884 -25,280 -1.51 25,331 0.78 0.0096
2018-08-10 2018-06-30 13F SPOK HLDGS COM 84863T106 1,670,164 -9,570 -0.57 25,136 0.10 0.0100
2018-05-11 2018-03-31 13F SPOK HLDGS COM 84863T106 1,679,734 -3,927 -0.23 25,112 -4.70 0.0105
2018-02-12 2017-12-31 13F SPOK HLDGS COM 84863T106 1,683,661 -9,125 -0.54 26,350 1.40 0.0109
2017-11-13 2017-09-30 13F SPOK HLDGS COM 84863T106 1,692,786 -32,165 -1.86 25,985 -14.89 0.0114
2017-08-11 2017-06-30 13F SPOK HLDGS COM 84863T106 1,724,951 116,992 7.28 30,532 -0.06 0.0141
2017-05-12 2017-03-31 13F SPOK HLDGS COM 84863T106 1,607,959 121,366 8.16 30,551 -0.96 0.0146
2017-02-09 2016-12-31 13F SPOK HLDGS COM 84863T106 1,486,593 39,235 2.71 30,847 19.60 0.0154
2016-11-10 2016-09-30 13F SPOK HLDGS COM 84863T106 1,447,358 34,273 2.43 25,791 -4.76 0.0139
2016-08-09 2016-06-30 13F SPOK HLDGS COM 84863T106 1,413,085 91,493 6.92 27,081 17.03 0.0156
2016-05-13 2016-03-31 13F SPOK HLDGS COM 84863T106 1,321,592 73,612 5.90 23,141 1.22 0.0139
2016-02-10 2015-12-31 13F SPOK HLDGS COM 84863T106 1,247,980 59,238 4.98 22,863 16.84 0.0143
2015-11-13 2015-09-30 13F SPOK HLDGS COM 84863T106 1,188,742 39,803 3.46 19,567 1.13 0.0128
2015-08-14 2015-06-30 13F SPOK HLDGS COM 84863T106 1,148,939 54,158 4.95 19,348 -7.81 0.0118
2015-05-14 2015-03-31 13F SPOK HLDGS COM 84863T106 1,094,781 48,862 4.67 20,987 15.59 0.0133
2015-02-06 2014-12-31 13F SPOK HLDGS COM 84863T106 1,045,919 29,761 2.93 18,157 37.34 0.0119
2014-11-13 2014-09-30 13F SPOK HLDGS COM 84863T106 1,016,158 1,016,158 13,220 0.0094
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.