Northwest Natural Holding Company (NWN) ownership: Top institutional holder: BlackRock, Inc. ($339.71M). Insider activity: Neutral (10 buys, 10 sells). 8 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 6383093.00 | $339.71M | 2026-03-31 |
| VANGUARD GROUP INC | 4706007.00 | $219.96M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2628040.00 | $139.86M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1832517.00 | $97.53M | 2026-03-31 |
| STATE STREET CORP | 1605211.00 | $85.43M | 2026-03-31 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. | 1189201.00 | $63.29M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1032239.00 | $54.95M | 2026-03-31 |
| MORGAN STANLEY | 831355.00 | $44.24M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-05-07 | |
| Sell | null | 2026-03-23 | |
| Buy | null | 2026-03-05 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.