Wednesday, September 16, 2026Latest filing Sep 14, 2026

NWN Congressional Stock Trades

Northwest Natural Holding Company (NWN) [ST]

Last disclosed trade Nov 15

Every disclosed trade in NWN by members of Congress under the STOCK Act, parsed by Coldpine. Informational only, sourced from public filings. Not investment advice.

Sample · the intelligence layer

Coldpine signal scoreA 0-1 composite from four weighted factors: disclosure speed, trade size, cluster activity (multiple members buying the same name), and the member’s track record. ≥ 0.65 is the high-conviction tier; ≥ 0.50 is moderate. Trades from trust-managed members are penalized (× 0.2 multiplier). It’s research, not a recommendation.

Earl Blumenauer · Bought $NWN · Nov 15 · $1K–$15K

0.45LOW
Disclosure speedx 0.250.60
Trade sizex 0.250.20
Cluster activityx 0.150.00
Track recordx 0.350.70

Every disclosed trade in the database gets this treatment: a four-factor score and a written read from Coldpine’s AI-based analysis. Informational only, not investment advice. Create a free account for every scored trade →

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8
Disclosed trades
8
Buys
0
Sells
1
Members trading

The record on $NWN

Coldpine has parsed 8 disclosed trades in $NWN by 1 member of Congress, drawn from 8 periodic transaction reports dated Feb 15, 2023 through Nov 15, 2024. All of them came from House members, all filed by Democrats.

Of the 8 trades with a known filing lag, every one was reported inside the STOCK Act's 45-day window. The median lag was 22 days. The longest was 26 days: a $NWN purchase by Earl Blumenauer dated Feb 15, 2024, disclosed Mar 12, 2024. How late filing is measured across all of Congress is in the late-filers study.

8 of the 8 trades that list an account holder (100%) were reported under a spouse, dependent child, or joint account rather than the member directly.

Activity peaked in 2024 with 4 trades.

Across the 8 purchases Coldpine can price, $NWN moved -0.57% on average between the trade date and the disclosure date, against +0.70% for the S&P 500 over the same windows. The stock was higher at disclosure than at the trade in 50% of those purchases. That is a record of what already happened, not a forecast. Method: what stocks do before Congress discloses.

Members who trade NWN

Recent disclosed trades in NWN

DateMemberTypeAmount
Nov 15Earl Blumenauer(OR)buy$1K–$15K
Aug 15Earl Blumenauer(OR)buy$1K–$15K
May 15Earl Blumenauer(OR)buy$1K–$15K
Feb 15Earl Blumenauer(OR)buy$1K–$15K
Nov 15Earl Blumenauer(OR)buy$1K–$15K
Aug 15Earl Blumenauer(OR)buy$1K–$15K
May 15Earl Blumenauer(OR)buy$1K–$15K
Feb 15Earl Blumenauer(OR)buy$1K–$15K

Data sourced from public STOCK Act disclosures. Coldpine is a publisher of intelligence on congressional disclosures, not an investment adviser. See full history and scores, free with an account →