Nathan I Partain
CIK 1180965 · Chief Investment Officer · last filed 2026-04-14
Nathan I Partain is a Chief Investment Officer who has filed 40 SEC Form 4 insider transactions across 5 companies since 2009. The most recent filing, for OTTR, was dated Apr 14, 2026. Across all open-market trades the lifetime net is +$312.2K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $2.1M across reported positions.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
DSE 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 monthDollar 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
latestMost 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
FERGUS FALLS, MN 56537
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| OTTR | Director | 12,569 | $90.07 | $1.13M | $0 | 17 | 2026-04-14 |
| NWN | Director | 10,369 | $49.92 | $517.6K | $0 | 12 | 2023-11-08 |
| Duff & Phelps Select MLP & Midstream Energy Fund Inc. (DSE) Delisted | Chief Investment Officer | 2,650 | $9.49 | $25.1K | $203.1K | 2 | 2016-08-05 |
| DNP | President and CEO | 44,186 | $9.96 | $440.1K | $73.2K | 5 | 2012-10-02 |
| DPG | President and CEO | 2,000 | $13.72 | $27.4K | $35.9K | 1 | 2011-10-05 |
Recent Filings
40 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-04-14 | OTTR | Grant (A) | +2,000 | $0 | EDGAR |
| 2025-04-14 | OTTR | Grant (A) | +2,200 | $0 | EDGAR |
| 2024-04-09 | OTTR | Grant (A) | +2,000 | $0 | EDGAR |
| 2023-11-08 | NWN | Disc (I) | +224 | $8.5K | EDGAR |
| 2023-08-08 | NWN | Disc (I) | +211 | $8.8K | EDGAR |
| 2023-05-09 | NWN | Disc (I) | +176 | $8.3K | EDGAR |
| 2023-04-19 | OTTR | Grant (A) | +2,000 | $0 | EDGAR |
| 2023-03-01 | NWN | Disc (I) | +178 | $8.5K | EDGAR |
| 2022-11-14 | NWN | Disc (I) | +363 | $16.5K | EDGAR |
| 2022-08-09 | NWN | Disc (I) | +313 | $16.5K | EDGAR |
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.