Latest filingSep 16, 2026Most recent Form 4
NEPH
NEPHROS INC
NasdaqHealthcareSurgical & Medical Instruments & Apparatus
Insider activity for last month from 08/17 to 09/17. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$06 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period7transactions
- J · Other · dominant5 · 71%
- M · Option exercise2 · 29%
Activity by reported role
A joint filing can contribute to multiple roles7transactions
- 10% owner · dominant4 · 57%
- Director3 · 43%
Distinct insiders active
Reporting-owner CIKs by month · peak Sep 2026 (6)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeAmron Arthur HCommon Stock · Indirect · See footnote
2,836Sep 14, 2026
Amron Holdings LLCCommon Stock · Indirect · See footnote
2,836Sep 14, 2026
Davidson Charles ECommon Stock · Indirect · See footnotes
189,377Sep 14, 2026
Wexford Capital LpCommon Stock · Indirect · See footnotes
166,667Sep 14, 2026
Jacobs JosephCommon Stock · Indirect · See footnotes
189,377Sep 14, 2026
Wexford GP LLCCommon Stock · Indirect · See footnotes
189,377Sep 14, 2026
Davidson Charles ECommon Stock · Direct
56,872Aug 18, 2026
Davidson Charles EStock Option (Right to Buy) · Direct
36,198Aug 18, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 17 → Sep 17
LessMore
Top insiders
By absolute net value across the selected period- AH+$89.7k
- WL-$86.8k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
NEPH transaction history
Filters apply within this company and selected period by defaultLatest insider transactions
Form 4 filings from last month. Click any column to sort; click it again to flip the order.
| ID | Ticker | Insider | Role | Type | Shares | Value | Code | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|
| #222528 | NEPH | Wexford Capital Lp | 10% | other | 22.7k | -$8.97M | J | 09/16 | 09/14 |
| #222527 | NEPH | Wexford Capital Lp | 10% | other | 3.35M | $0 | J | 09/16 | 09/14 |
| #222487 | NEPH | Amron Arthur H | DIR | other | 22.7k | $8.97M | J | 09/16 | 09/14 |
| #222486 | NEPH | Amron Arthur H | DIR | other | 2.83k | $0 | J | 09/16 | 09/14 |
| #222485 | NEPH | Amron Arthur H | DIR | other | 17.7k | $0 | J | 09/16 | 09/14 |
| #12947 | NEPH | Wexford Capital Lp | 10% | exercise | 3.76k | $0 | M | 08/20 | 08/18 |
| #12946 | NEPH | Wexford Capital Lp | 10% | exercise | 812 | $292k | M | 08/20 | 08/18 |
NEPHROS INC Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at NEPHROS INC?
DAVIDSON CHARLES E, JACOBS JOSEPH, WEXFORD CAPITAL LP, Wexford GP LLC, Amron Arthur H, Amron Holdings LLC.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.