Third Rock Ventures GP, L.P.
CIK 1578976 · last filed 2017-10-19
Third Rock Ventures GP, L.P. is a corporate insider who has filed 10 SEC Form 4 insider transactions across 6 companies since 2013. The most recent filing, for CTMX, was dated Oct 19, 2017. Across all open-market trades the lifetime net is −$216.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $484.4M across reported positions. The firm reports its address in Boston, MA. 40 SEC filings were submitted jointly with THIRD ROCK VENTURES LP.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
FMI price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
29 NEWBURY STREET, 3RD FLOOR
BOSTON, MA 02116
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CTMX | 10%+ Owner | 3,320,348 | $1.98 | $6.57M | $0 | 1 | 2017-10-19 |
| RYTM | 10%+ Owner | 3,981,437 | $113.95 | $453.68M | $0 | 1 | 2017-10-11 |
| Larimar Therapeutics, Inc. (ZFGN) Delisted | 10%+ Owner | 0 | — | — | $0 | 2 | 2015-07-24 |
| Foundation Medicine, Inc. (FMI) Delisted | 10%+ Owner | 828,456 | — | — | -$204.94M | 2 | 2015-04-16 |
| AGIO | 10%+ Owner | 760,195 | $31.76 | $24.14M | $0 | 2 | 2015-02-19 |
| bluebird bio, Inc. (BLUE) Delisted | 10%+ Owner | 0 | $4.97 | $0 | -$11.45M | 2 | 2014-09-12 |
Recent Filings
10 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2017-10-19 | CTMX | Other (J) | −1,000,000 | $0 | EDGAR |
| 2017-10-11 | RYTM | Conv (C) | +3,963,810 | $0 | EDGAR |
| 2015-07-24 | Larimar Therapeutics, Inc. (ZFGN) Delisted | Other (J) | −1,200,000 | $0 | EDGAR |
| 2015-04-16 | Foundation Medicine, Inc. (FMI) Delisted | Sell (S) | −4,098,778 | -$204.94M | EDGAR |
| 2015-03-25 | Larimar Therapeutics, Inc. (ZFGN) Delisted | Other (J) | −1,400,000 | $0 | EDGAR |
| 2015-02-19 | AGIO | Other (J) | −3,070,090 | $0 | EDGAR |
| 2014-09-12 | bluebird bio, Inc. (BLUE) Delisted | Mixed | −1,201,920 | -$4.57M | EDGAR |
| 2014-01-17 | bluebird bio, Inc. (BLUE) Delisted | Sell (S) | −307,000 | -$6.88M | EDGAR |
| 2013-10-02 | Foundation Medicine, Inc. (FMI) Delisted | Conv (C) | +6,219,645 | $0 | EDGAR |
| 2013-07-31 | AGIO | Conv (C) | +5,018,960 | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.