Phillip Gross

CIK 1403413 · last filed 2017-09-28

Phillip Gross is a corporate insider who has filed 26 SEC Form 4 insider transactions across 8 companies since 2009. The most recent filing shows the insider sold $45.0M of CALA on Sep 28, 2017. Across all open-market trades the lifetime net is +$7.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $43.5M across reported positions. 134 SEC filings were submitted jointly with Robert Atchinson.

"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
$43.52M
Companies
8
Total Filings
26
Lifetime Open-Market Net
$7.01M

Charts

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

PBYI 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
200 CLARENDON STREET
52ND FLOOR
BOSTON, MA 02116
Related Filers
Robert Atchinson — 134 joint filings, latest 2025-10-17
ADAGE CAPITAL PARTNERS GP, L.L.C. — 128 joint filings, latest 2023-07-10
Adage Capital Partners, L.P. — 128 joint filings, latest 2023-07-10
Adage Capital Advisors, L.L.C. — 127 joint filings, latest 2023-05-10
GCM Grosvenor Inc. — 8 joint filings, latest 2023-05-10
Adage Capital Management, L.P. — 7 joint filings, latest 2025-10-17
ORBCOMM Inc. — 4 joint filings, latest 2020-08-13
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
Calithera Biosciences, Inc. (CALA) Delisted 10%+ Owner 179,244 $0.00 $54 -$7.82M 5 2017-09-28
PBYI 10%+ Owner 3,854,302 $11.29 $43.52M -$39.33M 3 2017-06-12
MULESOFT, INC (MULE) Delisted 10%+ Owner 675,000 — — -$3.13M 1 2017-03-21
Ayala Pharmaceuticals, Inc. (ADXS.W) Delisted 10%+ Owner 5,917,766 — — $21.23M 1 2015-08-24
HeartWare International, Inc. (HTWR) Delisted 10%+ Owner 1,875,316 — — -$69.91M 1 2015-04-21
AMAG PHARMACEUTICALS, INC. (AMAG) Delisted 10%+ Owner 3,796,592 — — $143.60M 8 2013-09-26
Sleep Number Corp (SCSS) Delisted 10%+ Owner 6,792,200 — — -$51.78M 3 2011-02-03
BOULDER BRANDS, INC. (SMBL) Delisted 10%+ Owner 7,343,302 — — $14.15M 1 2009-03-26

Recent Filings

26 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
2017-09-28 Calithera Biosciences, Inc. (CALA) Delisted Sell (S) −2,880,000 -$45.04M EDGAR
2017-06-12 PBYI Sell (S) −1,236,300 -$99.29M EDGAR
2017-03-24 Calithera Biosciences, Inc. (CALA) Delisted Buy (P) +2,439,020 $25.00M EDGAR
2017-03-21 MULESOFT, INC (MULE) Delisted Sell (S) −125,000 -$3.13M EDGAR
2016-04-07 — Sell (S) −24,110,635 -$2.49M
2015-09-24 Calithera Biosciences, Inc. (CALA) Delisted Buy (P) +534,840 $3.22M EDGAR
2015-09-08 Calithera Biosciences, Inc. (CALA) Delisted Buy (P) +451,500 $2.68M EDGAR
2015-08-24 Ayala Pharmaceuticals, Inc. (ADXS.W) Delisted Buy (P) +1,500,000 $21.23M EDGAR
2015-04-21 HeartWare International, Inc. (HTWR) Delisted Sell (S) −866,335 -$69.91M EDGAR
2014-10-15 Calithera Biosciences, Inc. (CALA) Delisted Buy (P) +908,500 $6.32M EDGAR
Showing 1–10 of 26
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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.