Collegium Pharmaceutical, Inc. (COLL) has 20 known insider and institutional holders on record. The largest holder is Rubric Capital Management LP with 3,157,743 shares. Other notable holders include Skyline Venture Partners V LP and Boston Avenue Capital.
Over the last 12 months, insiders have made 29 transactions in COLL stock — 10 buys (valued at RSU Award) and 7 sells (valued at $3.02M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
COLL Insider Ownership
Top Holder
Rubric Capital Management LP
3,157,743 shares
Buys (12 mo)
10
$0.00 value
Sells (12 mo)
7
$3.02M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Rubric Capital Management Lp |
10 Percent Owner |
3,157,743 |
2025-08-15 |
|
| 2 |
Skyline Venture Partners V Lp |
10 Percent Owner |
2,149,916 |
2017-12-07 |
|
| 3 |
Boston Avenue Capital |
10 Percent Owner |
701,575 |
2006-02-28 |
|
| 4 |
Ciaffoni Joseph |
President and CEO |
394,000 |
2024-02-14 |
|
| 5 |
Brannelly Paul |
Executive Vice President & CFO |
215,428 |
2021-02-12 |
|
| 6 |
Karnani Vikram |
President and CEO |
176,629 |
2026-02-12 |
|
| 7 |
Tupper Colleen |
EVP & Chief Financial Officer |
147,282 |
2026-02-12 |
|
| 8 |
Fleming Alison B |
EVP & Chief Technical Officer |
143,694 |
2021-08-12 |
|
| 9 |
Kuhlmann Shirley R. |
EVP and General Counsel |
134,204 |
2025-03-06 |
|
| 10 |
Malamut Richard |
EVP and Chief Medical Officer |
130,264 |
2022-02-14 |
|
| 11 |
Santini Gino |
Director |
85,447 |
2025-05-19 |
|
| 12 |
Smith Thomas B |
EVP and Chief Medical Officer |
85,312 |
2026-02-12 |
|
| 13 |
Dreyer Scott |
EVP & Chief Commercial Officer |
71,770 |
2026-03-05 |
|
| 14 |
Dieter David |
EVP & General Counsel |
68,231 |
2026-04-03 |
|
| 15 |
Fallon John A. |
Director |
64,634 |
2025-05-19 |
|
| 16 |
Swift Randall |
Chief Operating Officer |
63,705 |
2005-09-27 |
|
| 17 |
Bohlin Garen G |
Director |
62,259 |
2025-05-19 |
|
| 18 |
Balice-gordon Rita J. |
Director |
52,629 |
2025-12-09 |
|
| 19 |
Melincoff Gwen A |
Director |
52,468 |
2024-05-16 |
|
| 20 |
Heffernan Michael Thomas |
Director |
50,328 |
2025-02-12 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-17 |
Dieter David |
EVP & General Counsel |
Tax Withholding of RSU |
8,840 |
$35.72 |
$315.76K |
| 2026-03-18 |
Dieter David |
EVP & General Counsel |
Informative Sell |
13,976 |
$34.92 |
$488.1K |
| 2026-03-03 |
Dreyer Scott |
EVP & Chief Commercial Officer |
Informative Sell |
3,559 |
$40.99 |
$145.88K |
| 2026-02-10 |
Dieter David |
EVP & General Counsel |
RSU Award |
22,194 |
- |
- |
| 2026-02-10 |
Tupper Colleen |
EVP & Chief Financial Officer |
Tax Withholding of RSU |
26,679 |
$46.75 |
$1.25M |
| 2026-02-10 |
Smith Thomas B |
EVP and Chief Medical Officer |
RSU Award |
14,268 |
- |
- |
| 2026-02-10 |
Dreyer Scott |
EVP & Chief Commercial Officer |
Tax Withholding of RSU |
21,615 |
$46.75 |
$1.01M |
| 2026-02-10 |
Karnani Vikram |
President and CEO |
RSU Award |
79,264 |
- |
- |
| 2025-12-08 |
Dreyer Scott |
EVP & Chief Commercial Officer |
Option Exercise (Sell) |
17,600 |
$15.90 |
$279.84K |
| 2025-12-05 |
Balice-gordon Rita J. |
Director |
Informative Sell |
3,650 |
$47.03 |
$171.67K |
| 2025-11-12 |
Karnani Vikram |
President and CEO |
Tax Withholding of RSU |
8,983 |
$47.35 |
$425.35K |
| 2025-11-12 |
Fallon John A. |
Director |
Option Exercise (Sell) |
19,853 |
$9.33 |
$185.23K |
| 2025-11-06 |
Tupper Colleen |
EVP & Chief Financial Officer |
Informative Sell |
4,858 |
$41.28 |
$200.52K |
| 2025-08-29 |
Smith Thomas B |
EVP and Chief Medical Officer |
Informative Sell |
17,478 |
$38.42 |
$671.58K |
| 2025-08-18 |
Dreyer Scott |
EVP & Chief Commercial Officer |
Option Exercise (Sell) |
16,389 |
$21.34 |
$349.74K |
| 2025-08-15 |
Santini Gino |
Director |
Option Exercise (Sell) |
15,000 |
$13.45 |
$201.75K |
| 2025-08-13 |
Dreyer Scott |
EVP & Chief Commercial Officer |
Option Exercise (Sell) |
4,861 |
$21.34 |
$103.73K |
| 2025-08-13 |
Rubric Capital Management Lp |
10 Percent Owner |
Informative Sell |
25,000 |
$37.85 |
$946.25K |
| 2025-08-07 |
Rubric Capital Management Lp |
10 Percent Owner |
Unknown |
- |
- |
- |
| 2025-08-08 |
Freund John Gordon |
Director |
Informative Sell |
11,659 |
$34.36 |
$400.64K |
| 2025-06-09 |
Freund John Gordon |
Director |
Option Exercise (Sell) |
15,000 |
$13.45 |
$201.75K |
| 2025-05-15 |
Balice-gordon Rita J. |
Director |
RSU Award |
9,791 |
- |
- |
| 2025-05-15 |
Paya Carlos V |
Director |
RSU Award |
19,582 |
- |
- |
| 2025-05-15 |
Paya Carlos V |
Director |
Unknown |
- |
- |
- |
| 2025-05-15 |
Fallon John A. |
Director |
RSU Award |
9,791 |
- |
- |
