KNSA · Insider trading · 13F holders · Congress trades
Kiniksa Pharmaceuticals International, plc (KNSA)
Who is buying and selling KNSA: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 20
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $369K
- Congress trades, 12 months
- 0
KNSA at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 KNSA insider filed 1 sale worth $369K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 20 13F filers hold KNSA among their 50 largest positions, worth $788.4M combined, including Julian and Felix Baker. The biggest bets by portfolio weight are Spruce Street Capital LP (11.5%), Tang Capital Management LLC (6.6%) and Rubric Capital Management LP (2.3%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
- No member of Congress has disclosed a trade in KNSA.
- KNSA last closed at $97.56 on Oct 29, 2026.
KNSA insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 KNSA insider filed 1 sale worth $369K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Sep 3, 2026 | Megna Michael R | CHIEF ACCOUNTING OFFICER | Sale10b5-1 | 4,600 | $80.30 | $369K | SEC |
Who owns KNSA? Hedge funds and superinvestors
20 13F filers hold KNSA among their 50 largest positions, worth $788.4M combined, including Julian and Felix Baker. The biggest bets by portfolio weight are Spruce Street Capital LP (11.5%), Tang Capital Management LLC (6.6%) and Rubric Capital Management LP (2.3%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
Superinvestors holding KNSA: Julian and Felix Baker 0.9%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Rubric Capital Management LPHedge fund | 2.3% | $255.8M | 3,999,800 | +6.7% shares | Q2 2026 |
| Julian and Felix BakerHedge fund | 0.9% | $181.3M | 2,834,643 | +0.3% shares | Q2 2026 |
| Tang Capital Management LLCHedge fund | 6.6% | $144.5M | 2,259,889 | +0.0% shares | Q2 2026 |
| Spruce Street Capital LPHedge fund | 11.5% | $58.7M | 918,070 | +20.6% shares | Q2 2026 |
| Rice Hall James & Associates, LLCAsset manager | 1.9% | $40.0M | 624,928 | +2.7% shares | Q2 2026 |
| Penn Capital Management Company, LLCInstitutional asset manager | 1.5% | $23.6M | 368,114 | +21.9% shares | Q2 2026 |
| Soleus Capital Management, L.P.Hedge fund | 0.5% | $15.8M | 246,353 | -52.7% shares | Q2 2026 |
| Essex Investment Management Co LLCAsset manager | 2.2% | $15.1M | 202,021 | -16.3% shares | Q3 2026 |
| ArrowMark Colorado Holdings LLCHedge fund | 0.6% | $13.8M | 215,546 | — | Q2 2026 |
| Stempoint Capital LPHedge fund | 2.3% | $13.4M | 209,234 | — | Q2 2026 |
| Globeflex Capital L PAsset manager | 0.8% | $6.0M | 93,396 | +0.0% shares | Q2 2026 |
| Lisanti Capital Growth, LLCInstitutional asset manager | 1.2% | $5.6M | 87,305 | — | Q2 2026 |
| Legato Capital Management LLCInstitutional asset manager | 0.5% | $5.6M | 87,297 | — | Q2 2026 |
| Timothy G. Youngquist 2020 Irrevocable TrustInvestment manager | 0.5% | $2.6M | 34,341 | +0.0% shares | Q3 2026 |
| Artia Global Partners LPHedge fund | 0.4% | $1.9M | 29,200 | +0.0% shares | Q2 2026 |
| Precision Wealth Strategies, LLCWealth manager | 0.4% | $1.4M | 22,348 | — | Q2 2026 |
| Superstring Capital Management LPHedge fund | 0.8% | $1.2M | 18,867 | New | Q2 2026 |
| Ami Asset Management CorpWealth manager | 0.1% | $1.1M | 15,341 | — | Q3 2026 |
| Mark Sheptoff Financial Planning, LLCWealth manager | 0.5% | $1.0M | 16,000 | -3.0% shares | Q2 2026 |
| PSP Research LLCInstitutional asset manager | 0.2% | $261K | 3,500 | -30.0% shares | Q3 2026 |
Each manager counts with its latest 13F (Q3 2026: 4, Q2 2026: 16). Screen KNSA in the grand portfolio →
KNSA stock trades by members of Congress
No member of Congress has disclosed a trade in KNSA.
KNSA questions and answers
Are insiders buying KNSA stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 KNSA insider filed 1 sale worth $369K on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own KNSA?
20 13F filers hold KNSA among their 50 largest positions, worth $788.4M combined, including Julian and Felix Baker. The biggest bets by portfolio weight are Spruce Street Capital LP (11.5%), Tang Capital Management LLC (6.6%) and Rubric Capital Management LP (2.3%). In their latest 13Fs, 1 manager opened a new position and 3 added to one.
Has Congress traded KNSA?
No member of Congress has disclosed a trade in KNSA.
Who is the largest holder of KNSA?
Among 13F filers, Rubric Capital Management LP reports the largest KNSA position, $255.8M (3,999,800 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Spruce Street Capital LP's: 11.5% of its portfolio.
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