David Nierenberg

CIK 1040899 · last filed 2023-12-15

"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
$21.54M
Companies
10
Total Filings
97
Lifetime Open-Market Net
-$18.12M

Charts

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

MOVE 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
19605 NE 8TH STREET
CAMAS, WA 98607
Related Filers
Nierenberg Investment Management Company, LLC — 194 joint filings, latest 2025-03-31
D3 Family Bulldog Fund, LP — 126 joint filings, latest 2019-03-15
D3 Family Canadian Fund, LP — 121 joint filings, latest 2015-01-30
D3 Family Fund, LP — 98 joint filings, latest 2019-03-15
Nierenberg Investment Management Offshore Inc — 83 joint filings, latest 2015-01-30
DIII Offshore Fund, LP — 80 joint filings, latest 2015-01-30
Cara Denver — 26 joint filings, latest 2007-08-14
Henry E Hooper — 26 joint filings, latest 2007-08-14
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
FTK Director 835,079 $24.72 $20.64M $5.68M 26 2023-12-15
ROSETTA STONE INC (RST) Delisted Director 0 — — -$14.43M 16 2020-10-16
RVSB Director 130,869 $6.13 $802.2K $637.0K 6 2020-03-17
Houston Wire & Cable CO (HWCC) Delisted Director 664,888 $5.30 $3.52M $799.6K 1 2020-03-17
ELECTRO SCIENTIFIC INDUSTRIES INC (ESIO) Delisted Director 152,903 — — $919.4K 7 2015-05-18
ASSET ACCEPTANCE CAPITAL CORP (AACC) Delisted 10%+ Owner 2,787,899 — — $4.08M 12 2013-04-16
MOVE 10%+ Owner 14,553 $6.40 $93.1K -$16.56M 7 2012-11-29
NATUS MEDICAL INC (BABY) Delisted 10%+ Owner 477,083 — — -$9.41M 6 2010-03-09
MEXICAN RESTAURANTS INC (CASA) Delisted 10%+ Owner 0 $0.04 $0 -$2.39M 1 2009-12-02
MEDCATH CORP (MDTH) Delisted 10%+ Owner 166,785 — — $12.54M 6 2008-08-27

Recent Filings · Page 6 of 10

97 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
2015-04-17 ROSETTA STONE INC (RST) Delisted Grant (A) — $0 EDGAR
2013-06-28 — Exer (M) +3,750 $0
2013-04-16 ASSET ACCEPTANCE CAPITAL CORP (AACC) Delisted Sell (S) −430,478 -$2.80M EDGAR
2012-11-29 MOVE Sell (S) −1,750,000 -$12.70M EDGAR
2012-10-09 ASSET ACCEPTANCE CAPITAL CORP (AACC) Delisted Sell (S) −500 -$4.0K EDGAR
2012-02-17 ELECTRO SCIENTIFIC INDUSTRIES INC (ESIO) Delisted Grant (A) −74,856 -$1.14M EDGAR
2012-02-01 ELECTRO SCIENTIFIC INDUSTRIES INC (ESIO) Delisted Grant (A) −147,078 -$2.24M EDGAR
2011-09-14 MOVE Sell (S) −7,000,000 -$9.80M EDGAR
2011-04-18 ASSET ACCEPTANCE CAPITAL CORP (AACC) Delisted Buy (P) +35,763 $192.2K EDGAR
2010-03-09 NATUS MEDICAL INC (BABY) Delisted Sell (S) −217,774 -$3.14M EDGAR
Showing 51–60 of 97
Page 6 of 10
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.