I've completed the collection and filtering. Here's my assessment:
r/QuantumComputing — All stock-relevant posts (IBM acquiring HRL Laboratories, IBM CEO's 2029 fault-tolerance promise, IONQ/Quantinuum 2029 roadmaps, German 100+ qubit diamond processor) are already in the seen file and were reported previously. The genuinely new posts since the last run are all academic/educational/career content (how to read research papers, multidimensional irreps, CCCX/Toffoli gates, BB84 teaching, klayout, career threads) with zero stock, investment, ticker, or market relevance.
r/QuantumStock — Effectively dead; the only retrievable post is from December 2024 (D-Wave Canadian government shareholding speculation), already stale and not new.
No keyword search (stock / IONQ / Rigetti / D-Wave / Quantinuum / investment / IBM) surfaced any new market-moving thread beyond what's already been delivered. Per the dedup rules, there is no new stock-relevant information to brief on.