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Matrix VIII US Management Co. LLC

CIK 1600025 · last filed 2019-07-26

Matrix VIII US Management Co. LLC is a corporate insider who has filed 10 SEC Form 4 insider transactions across 1 company since 2016. The most recent filing, for ACIA, was dated Jul 26, 2019. Across all open-market trades the lifetime net is −$139.5M, making them a net seller over the disclosed history. The firm reports its address in Cambridge, MA.

"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

$0

Companies

1

Total Filings

10

Lifetime Open-Market Net

-$139.55M

Filer Profile

Reported Address
C/O MATRIX PARTNERS
101 MAIN STREET 17TH FLOOR
CAMBRIDGE, MA 02142
Phone
(617) 494-1223
State of Incorporation
DE
Related Filers
MATRIX PARTNERS VII LP ET AL — same reported address
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
Acacia Communications, Inc. (ACIA) Delisted 10%+ Owner 35,536 — — -$139.55M 10 2019-07-26

Recent Filings

10 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
2019-07-26 Acacia Communications, Inc. (ACIA) Delisted Other (J) −1,493,638 $0 EDGAR
2019-02-28 Acacia Communications, Inc. (ACIA) Delisted Other (J) −1,492,811 $0 EDGAR
2018-12-03 Acacia Communications, Inc. (ACIA) Delisted Other (J) −1,493,686 $0 EDGAR
2018-11-08 Acacia Communications, Inc. (ACIA) Delisted Other (J) −1,493,679 $0 EDGAR
2018-08-28 Acacia Communications, Inc. (ACIA) Delisted Other (J) −995,760 $0 EDGAR
2018-08-21 Acacia Communications, Inc. (ACIA) Delisted Other (J) −995,737 $0 EDGAR
2018-05-17 Acacia Communications, Inc. (ACIA) Delisted Other (J) −995,749 $0 EDGAR
2018-03-15 Acacia Communications, Inc. (ACIA) Delisted Other (J) −995,722 $0 EDGAR
2016-10-14 Acacia Communications, Inc. (ACIA) Delisted Sell (S) −1,446,104 -$139.55M EDGAR
2016-05-20 Acacia Communications, Inc. (ACIA) Delisted Conv (C) +12,098,220 $0 EDGAR
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.