Spok Holdings, Inc.
US ˙ NasdaqGS ˙ US84863T1060

SecuritySPOK / Spok Holdings, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership64,068 shares
Latest Disclosed Value $ 698,341
Engineers Gate Manager LP reports 76.22% increase in ownership of SPOK / Spok Holdings, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 64,068 shares of Spok Holdings, Inc. (US:SPOK) valued at $698,341 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 36,356 shares of Spok Holdings, Inc.. This represents a change in shares of 76.22% during the quarter. The current value of the position is $678,480 USD.

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)
2026-05-15 2026-03-31 13F SPOK HLDGS COM 84863T106 64,068 27,712 76.22 698 45.72 0.0087
2026-02-17 2025-12-31 13F SPOK HLDGS COM 84863T106 36,356 3,104 9.33 480 -16.40 0.0057
2025-11-14 2025-09-30 13F SPOK HLDGS COM 84863T106 33,252 11,294 51.43 574 47.68 0.0066
2025-08-14 2025-06-30 13F SPOK HLDGS COM 84863T106 21,958 -4,948 -18.39 388 -12.22 0.0048
2025-05-15 2025-03-31 13F SPOK HLDGS COM 84863T106 26,906 -3,634 -11.90 442 -9.80 0.0075
2025-02-14 2024-12-31 13F SPOK HLDGS COM 84863T106 30,540 -1,775 -5.49 490 0.82 0.0085
2024-11-14 2024-09-30 13F SPOK HLDGS COM 84863T106 32,315 32,315 487 0.0095
2023-11-14 2023-09-30 13F SPOK HLDGS COM 84863T106 0 -17,087 -100.00 0 -100.00
2023-08-14 2023-06-30 13F SPOK HLDGS COM 84863T106 17,087 -22,909 -57.28 227 -43.95 0.0086
2023-05-15 2023-03-31 13F SPOK HLDGS COM 84863T106 39,996 -7,270 -15.38 405 4.65 0.0169
2023-02-14 2022-12-31 13F SPOK HLDGS COM 84863T106 47,266 24,315 105.94 387 121.14 0.0233
2022-11-14 2022-09-30 13F SPOK HLDGS COM 84863T106 22,951 -26,892 -53.95 175 -44.27 0.0109
2022-08-15 2022-06-30 13F SPOK HLDGS COM 84863T106 49,843 9,212 22.67 314 -3.09 0.0115
2022-05-16 2022-03-31 13F SPOK HLDGS COM 84863T106 40,631 9,418 30.17 324 11.34 0.0127
2022-02-14 2021-12-31 13F SPOK HLDGS COM 84863T106 31,213 -10,227 -24.68 291 -31.37 0.0131
2021-11-15 2021-09-30 13F SPOK HLDGS COM 84863T106 41,440 13,183 46.65 424 55.88 0.0242
2021-08-16 2021-06-30 13F SPOK HLDGS COM 84863T106 28,257 16,321 136.74 272 117.60 0.0175
2021-05-17 2021-03-31 13F SPOK HLDGS COM 84863T106 11,936 -1,400 -10.50 125 -15.54 0.0062
2021-02-16 2020-12-31 13F SPOK HLDGS COM 84863T106 13,336 2,292 20.75 148 40.95 0.0064
2020-11-16 2020-09-30 13F SPOK HLDGS COM 84863T106 11,044 -1,895 -14.65 105 -13.22 0.0049
2020-08-17 2020-06-30 13F SPOK HLDGS COM 84863T106 12,939 12,939 121 0.0062
2020-05-15 2020-03-31 13F SPOK HLDGS COM 84863T106 0 -15,233 -100.00 0 -100.00
2020-02-14 2019-12-31 13F SPOK HLDGS COM 84863T106 15,233 -9,039 -37.24 186 -35.86 0.0082
2019-11-14 2019-09-30 13F SPOK HLDGS COM 84863T106 24,272 8,022 49.37 290 18.85 0.0147
2019-08-14 2019-06-30 13F SPOK HLDGS COM 84863T106 16,250 16,250 244 0.0135
2019-02-14 2018-12-31 13F SPOK HLDGS COM 84863T106 0 -11,267 -100.00 0 -100.00
2018-11-01 2018-09-30 13F SPOK HLDGS COM 84863T106 11,267 11,267 174 0.0134
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.