Progyny, Inc.
US ˙ NasdaqGS ˙ US74340E1038

SecurityPGNY / Progyny, Inc.
InstitutionCenterBook Partners LP
Latest Disclosed Ownership877,577 shares
Latest Disclosed Value $ 14,901,257
CenterBook Partners LP reports 51.79% increase in ownership of PGNY / Progyny, Inc.

On May 5, 2026 - CenterBook Partners LP filed a 13F-HR form disclosing ownership of 877,577 shares of Progyny, Inc. (US:PGNY) valued at $14,901,257 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 578,171 shares of Progyny, Inc.. This represents a change in shares of 51.79% during the quarter. The current value of the position is $22,694,141 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)
2026-05-05 2026-03-31 13F PROGYNY COM 74340E103 877,577 299,406 51.79 14,901 0.36 0.8006
2026-02-11 2025-12-31 13F PROGYNY COM 74340E103 578,171 14,847
2025-11-07 2025-09-30 13F PROGYNY COM 74340E103 424,393 310,516 272.68 9,133 264.55 0.4513
2025-08-12 2025-06-30 13F PROGYNY COM 74340E103 113,877 -401,749 -77.91 2,505 -78.25 0.1392
2025-05-09 2025-03-31 13F PROGYNY COM 74340E103 515,626 423,257 458.22 11,519 623.10 0.7338
2025-02-13 2024-12-31 13F PROGYNY COM 74340E103 92,369 92,369 1,593 0.0952
2023-05-15 2023-03-31 13F PROGYNY COM 74340E103 0 -75,565 -100.00 0 -100.00
2023-02-13 2022-12-31 13F PROGYNY COM 74340E103 75,565 24,949 49.29 2,354 25.43 0.3877
2022-11-14 2022-09-30 13F PROGYNY COM 74340E103 50,616 16,289 47.45 1,876 88.16 0.3619
2022-08-15 2022-06-30 13F PROGYNY COM 74340E103 34,327 25,945 309.53 997 131.32 0.2135
2022-05-16 2022-03-31 13F PROGYNY COM 74340E103 8,382 -8,842 -51.34 431 -50.29 0.1534
2022-02-11 2021-12-31 13F PROGYNY COM 74340E103 17,224 17,224 867 0.5091
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.