Insider transactions

Mark J Levin

CIK 1180428 · last filed 2021-11-16

"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.

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Disclosed Exposure
$130.49M
Companies
14
Total Filings
89
Lifetime Open-Market Net
-$1.19B

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

GBT 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 month

Dollar 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

latest
OfficerDirector10% owner* stale (no filing in 3 yrs)

Most 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

Reported Address
29 NEWBURY STREET
3RD FLOOR
BOSTON, MA 02116
Related Filers
Robert I Tepper — 84 joint filings, latest 2021-11-16
MILLENNIUM PHARMACEUTICALS INC — 68 joint filings, latest 2008-05-15
Kevin P Starr — 65 joint filings, latest 2021-11-16
TRV GP II, LLC — 50 joint filings, latest 2021-09-17
Third Rock Ventures GP II, L.P. — 50 joint filings, latest 2021-09-17
Third Rock Ventures II, L.P. — 50 joint filings, latest 2021-09-17
TRV GP III, LLC — 31 joint filings, latest 2021-11-16
Third Rock Ventures GP III, L.P. — 31 joint filings, latest 2021-11-16
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
Jounce Therapeutics, Inc. (JNCE) Delisted 10%+ Owner 1,432,630 $1.88 $2.69M -$197.76M 2 2021-11-16
FULC Director 84,223 $3.65 $307.4K $1.30M 5 2021-11-12
RVMD 10%+ Owner 116,334 $177.96 $20.70M -$349.03M 3 2021-06-07
VYGR Director 6,424,205 $1.90 $12.21M $0 11 2021-06-04
NRIX 10%+ Owner 3,500,667 $24.42 $85.49M $0 1 2021-05-10
CONSTELLATION PHARMACEUTICALS INC (CNST) Delisted 10%+ Owner 3,034,083 $33.99 $103.13M $0 1 2018-08-24
MyoKardia, Inc. (MYOK) Delisted 10%+ Owner 280,057 — — $0 2 2018-03-07
Global Blood Therapeutics, Inc. (GBT) Delisted 10%+ Owner 4,475,191 $68.49 $306.51M -$470.21M 4 2017-04-06
CTMX 10%+ Owner 5,170,348 $2.28 $11.79M -$172.20M 2 2017-03-27
Blueprint Medicines Corp (BPMC) Delisted 10%+ Owner 3,570,197 $129.46 $462.20M -$1.23M 1 2017-03-20
Sage Therapeutics, Inc. (SAGE) Delisted 10%+ Owner 0 $8.68 $0 $0 1 2015-01-28
Carisma Therapeutics Inc. (EBIO) Delisted Director — — — $0 1 2014-03-24
Foundation Medicine, Inc. (FMI) Delisted Director 6,569,645 — — $0 1 2013-10-02
MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Director 400,000 — — -$4.69M 54 2008-05-15

Recent Filings · Page 6 of 9

89 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2007-11-29 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −800 -$12.2K EDGAR
2007-11-26 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −9,600 -$135.0K EDGAR
2007-11-26 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −400 -$5.7K EDGAR
2007-11-15 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −9,600 -$134.1K EDGAR
2007-11-15 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −400 -$5.6K EDGAR
2007-11-08 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −2,900 -$37.8K EDGAR
2007-11-08 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −7,100 -$93.6K EDGAR
2007-10-04 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −10,000 -$102.6K EDGAR
2007-09-27 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −10,000 -$101.5K EDGAR
2007-09-20 MILLENNIUM PHARMACEUTICALS INC (MLNM) Delisted Sell (S) −10,000 -$105.6K EDGAR
Showing 51–60 of 89
Page 6 of 9
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.