Who owns ARTC (ARTC)
Which tracked institutional funds hold ARTC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ARTC company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
ARTC’s largest tracked holder by dollar value, Linden Advisors LP, sizes it at 0.8% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.7pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ARTC 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
Only one quarter (2026-Q1) of 13F history is available — a quarter-over-quarter accumulation delta needs two.
We do not publish a positioning read for a window we cannot measure honestly. A starting question, not a verdict.
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.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Linden Advisors LP new | 1,600,000 | $16M | 7.9% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. new | 1,500,000 | $15M | 7.4% | 2026-Q1 |
| Polar Asset Management Partners Inc. new | 1,500,000 | $15M | 7.4% | 2026-Q1 |
| JPMORGAN CHASE & CO new | 1,500,000 | $15M | 7.4% | 2026-Q1 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC new | 1,500,000 | $15M | 7.4% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. new | 1,435,717 | $14M | 7.1% | 2026-Q1 |
| METEORA CAPITAL, LLC new | 1,050,000 | $10M | 5.2% | 2026-Q1 |
| AQR Arbitrage LLC new | 1,045,608 | $10M | 5.2% | 2026-Q1 |
| Magnetar Financial LLC new | 1,000,000 | $10M | 5.0% | 2026-Q1 |
| Mint Tower Capital Management B.V. new | 1,000,000 | $10M | 5.0% | 2026-Q1 |
| Shaolin Capital Management LLC new | 910,000 | $9M | 4.5% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 750,000 | $7M | 3.7% | 2026-Q1 |
| Alberta Investment Management Corp new | 750,000 | $7M | 3.7% | 2026-Q1 |
| Clear Street Group Inc. new | 679,564 | $7M | 3.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS new | 604,376 | $6M | 3.0% | 2026-Q1 |
| Periscope Capital Inc. new | 584,900 | $6M | 2.9% | 2026-Q1 |
| GLAZER CAPITAL, LLC new | 450,000 | $4M | 2.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP new | 398,750 | $4M | 2.0% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. new | 339,987 | $3M | 1.7% | 2026-Q1 |
| BERKLEY W R CORP new | 247,924 | $2M | 1.2% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 196,883 | $2M | 1.0% | 2026-Q1 |
| Hudson Bay Capital Management LP new | 184,872 | $2M | 0.9% | 2026-Q1 |
| Radcliffe Capital Management, L.P. new | 134,252 | $1M | 0.7% | 2026-Q1 |
| WHITEBOX ADVISORS LLC new | 126,066 | $1M | 0.6% | 2026-Q1 |
| Ghisallo Capital Management LLC new | 100,000 | $982K | 0.5% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC new | 100,000 | $981K | 0.5% | 2026-Q1 |
| CSS LLC/IL new | 91,500 | $898K | 0.5% | 2026-Q1 |
| Logan Stone Capital, LLC new | 74,996 | $736K | 0.4% | 2026-Q1 |
| First Trust Capital Management L.P. new | 65,940 | $647K | 0.3% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC new | 60,120 | $590K | 0.3% | 2026-Q1 |
| Warberg Asset Management LLC new | 50,000 | $491K | 0.2% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. new | 50,000 | $490K | 0.2% | 2026-Q1 |
| ABC ARBITRAGE SA new | 40,000 | $392K | 0.2% | 2026-Q1 |
| Virtu Financial LLC new | 26,607 | $261K | 0.1% | 2026-Q1 |
| Kepos Capital LP new | 25,000 | $245K | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC new | 10,815 | $106K | 0.1% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC new | 8,367 | $82K | 0.0% | 2026-Q1 |
| MORGAN STANLEY new | 12 | $118 | 0.0% | 2026-Q1 |
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.