Who owns Arcadia Biosciences, Inc. (RKDA)
Which tracked institutional funds hold RKDA, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See RKDA company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
RKDA’s largest tracked holder by dollar value, ARMISTICE CAPITAL, LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in RKDA divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 16 tracked filers holding RKDA, 9 increased or opened the position and 3 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC added | 159,390 | $220K | 37.4% | 2026-Q1 |
| SABBY MANAGEMENT, LLC added | 114,554 | $158K | 26.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 31,743 | $44K | 7.4% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 12,614 | $17K | 3.0% | 2026-Q1 |
| STATE STREET CORP | 12,146 | $17K | 2.8% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 9,644 | $13K | 2.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 4,394 | $6K | 1.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 3,940 | $5K | 0.9% | 2026-Q1 |
| UBS Group AG added | 807 | $1K | 0.2% | 2026-Q1 |
| SBI Securities Co., Ltd. | 120 | $166 | 0.0% | 2026-Q1 |
| GROUP ONE TRADING LLC | 18 | $25 | 0.0% | 2026-Q1 |
| ASSETMARK, INC | 5 | $7 | 0.0% | 2026-Q1 |
| SOUTHERN MICHIGAN BANK & TRUST new | 2 | $3 | 0.0% | 2026-Q1 |
| MORGAN STANLEY | 2 | $3 | 0.0% | 2026-Q1 |
| CITIGROUP INC | 1 | $1 | 0.0% | 2026-Q1 |
| HARBOUR INVESTMENTS, INC. | 1 | $1 | 0.0% | 2026-Q1 |
| Mariner, LLC trimmed | 12,264 | $43K | 7.2% | 2025-Q3 stale |
| DRW Securities, LLC new | 10,032 | $35K | 5.9% | 2025-Q3 stale |
| VANGUARD GROUP INC | 14,038 | $28K | 4.7% | 2025-Q4 stale |
| ATTICUS WEALTH MANAGEMENT, LLC | 272 | $1K | 0.2% | 2025-Q2 stale |
| OSAIC HOLDINGS, INC. | 75 | $148 | 0.0% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ | 12 | $24 | 0.0% | 2025-Q4 stale |
| PFS Partners, LLC new | 5 | $18 | 0.0% | 2025-Q3 stale |
| Larson Financial Group LLC new | 1 | $3 | 0.0% | 2025-Q1 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.