Collegium Pharmaceutical, Inc.
US ˙ NasdaqGS ˙ US19459J1043

SecurityCOLL / Collegium Pharmaceutical, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership360,826 shares
Latest Disclosed Value $ 11,932,516
Millennium Management Llc reports 413.39% increase in ownership of COLL / Collegium Pharmaceutical, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 360,826 shares of Collegium Pharmaceutical, Inc. (US:COLL) valued at $11,932,516 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 70,283 shares of Collegium Pharmaceutical, Inc.. This represents a change in shares of 413.39% during the quarter. The current value of the position is $11,795,402 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 COLLEGIUM PHARMACEUTICAL COM 19459J104 360,826 290,543 413.39 11,933 266.69 0.0050
2026-02-17 2025-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 70,283 -51,903 -42.48 3,254 -23.88 0.0014
2025-11-14 2025-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 122,186 -101,786 -45.45 4,275 -35.44 0.0018
2025-08-14 2025-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 223,972 -423,860 -65.43 6,623 -65.75 0.0032
2025-05-15 2025-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 647,832 461,914 248.45 19,338 263.07 0.0103
2025-02-14 2024-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 185,918 51,972 38.80 5,327 2.92 0.0026
2024-11-14 2024-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 133,946 -169,924 -55.92 5,176 -47.11 0.0025
2024-08-14 2024-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 303,870 110,499 57.14 9,785 30.35 0.0045
2024-05-15 2024-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 193,371 -250,274 -56.41 7,507 -45.03 0.0032
2024-02-14 2023-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 443,645 -39,328 -8.14 13,655 26.51 0.0059
2023-11-14 2023-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 482,973 142,051 41.67 10,794 47.34 0.0054
2023-08-14 2023-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 340,922 -243,388 -41.65 7,326 -47.74 0.0036
2023-05-15 2023-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 584,310 543,729 1,339.86 14,018 1,389.69 0.0080
2023-02-14 2022-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 40,581 -429,094 -91.36 941 -87.49 0.0005
2022-11-14 2022-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 469,675 457,604 3,790.94 7,524 3,415.89 0.0044
2022-08-15 2022-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 12,071 12,071 214 0.0001
2022-02-14 2021-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 0 -54,099 -100.00 0 -100.00
2021-11-15 2021-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 54,099 -80,638 -59.85 1,068 -66.47 0.0006
2021-08-16 2021-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 134,737 58,847 77.54 3,185 77.04 0.0020
2021-05-17 2021-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 75,890 -105,908 -58.26 1,799 -50.59 0.0013
2021-02-16 2020-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 181,798 164,648 960.05 3,641 919.89 0.0026
2020-11-16 2020-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 17,150 17,150 357 0.0004
2020-05-14 2020-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 0 -149,575 -100.00 0 -100.00
2020-02-14 2019-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 149,575 149,575 3,078 0.0039
2019-11-14 2019-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 0 -12,812 -100.00 0 -100.00
2019-08-15 2019-06-30 13F/A-1 COLLEGIUM PHARMACEUTICAL COM 19459J104 12,812 -55,226 -81.17 168 -83.69 0.0003
2019-08-14 2019-06-30 13F FAIR ISAAC COM 19459J104 46,146 -21,892 14,491
2019-05-14 2019-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 68,038 -1,236,963 -94.79 1,030 -95.40 0.0015
2019-02-15 2018-12-31 13F/A-1 COLLEGIUM PHARMACEUTICAL COM 19459J104 1,305,001 1,169,537 863.36 22,407 1,022.03 0.0349
2019-02-14 2018-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 1,305,001 22,407
2018-11-14 2018-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 135,464 -225,571 -62.48 1,997 -76.81 0.0024
2018-08-14 2018-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 361,035 332,647 1,171.79 8,611 1,087.72 0.0112
2018-05-15 2018-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 28,388 -37,829 -57.13 725 -40.67 0.0010
2018-02-14 2017-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 66,217 -1,106,580 -94.35 1,222 -90.07 0.0017
2017-11-14 2017-09-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 1,172,797 823,208 235.48 12,303 181.34 0.0187
2017-08-14 2017-06-30 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 349,589 263,346 305.35 4,373 403.80 0.0078
2017-05-15 2017-03-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 86,243 59,875 227.07 868 111.19 0.0016
2017-02-14 2016-12-31 13F COLLEGIUM PHARMACEUTICAL COM 19459J104 26,368 26,368 411 0.0009
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.