DEFINIUM THERAPEUTICS INC (DFTX): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in DFTX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
23
13F filers
Aggregate Value
$543.8M
Across holders
Last Price
$32.97
2026-10-19
Sector
Health Care
GICS
Quarterly fund activity14 increased9 reduced5 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 1.69M | $79.4M | 14.6% | 0.0% | Added | +$71.4M | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 1.30M | $61.1M | 11.2% | 0.0% | Added | $-108.4M | Q2 2026 |
| Woodline Partners LP CIK 0001784547 | Hedge Fund | 1.00M | $47.2M | 8.7% | 0.1% | Added | +$11.8M | Q2 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 1.00M | $47.0M | 8.7% | 0.1% | Reduced | $-7.1M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 922K | $43.4M | 8.0% | 0.0% | Reduced | $-13.2M | Q2 2026 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 898K | $42.2M | 7.8% | 0.1% | Reduced | $-77.7M | Q2 2026 |
| Holocene Advisors, LP CIK 0001700574 | Hedge Fund | 797K | $37.5M | 6.9% | 0.1% | Reduced | $-13.9M | Q2 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 683K | $32.1M | 5.9% | 0.0% | Added | +$12.1M | Q2 2026 |
| ArrowMark Colorado Holdings LLC CIK 0001483859 | Hedge Fund | 564K | $26.5M | 4.9% | 1.1% | Reduced | $-48.5M | Q2 2026 |
| Point72 Asset Management, L.P. CIK 0001603466 | Hedge Fund | 484K | $22.8M | 4.2% | 0.0% | Added | +$14.5M | Q2 2026 |
Added
Hedge Fund
$79.4M· 14.6% of total· 0.0% port· 1.69M sh· +$71.4M QoQ· Q2 2026
Added
Hedge Fund
$61.1M· 11.2% of total· 0.0% port· 1.30M sh· $-108.4M QoQ· Q2 2026
Added
Hedge Fund
$47.2M· 8.7% of total· 0.1% port· 1.00M sh· +$11.8M QoQ· Q2 2026
Reduced
Hedge Fund
$47.0M· 8.7% of total· 0.1% port· 1.00M sh· $-7.1M QoQ· Q2 2026
Reduced
Hedge Fund
$43.4M· 8.0% of total· 0.0% port· 922K sh· $-13.2M QoQ· Q2 2026
Reduced
Hedge Fund
$42.2M· 7.8% of total· 0.1% port· 898K sh· $-77.7M QoQ· Q2 2026
Reduced
Hedge Fund
$37.5M· 6.9% of total· 0.1% port· 797K sh· $-13.9M QoQ· Q2 2026
Added
Hedge Fund
$32.1M· 5.9% of total· 0.0% port· 683K sh· +$12.1M QoQ· Q2 2026
Reduced
Hedge Fund
$26.5M· 4.9% of total· 1.1% port· 564K sh· $-48.5M QoQ· Q2 2026
Added
Hedge Fund
$22.8M· 4.2% of total· 0.0% port· 484K sh· +$14.5M QoQ· Q2 2026
Reduced
Hedge Fund
$17.2M· 3.2% of total· 0.3% port· 365K sh· $-20.6M QoQ· Q2 2026
Added
Family Office
$16.8M· 3.1% of total· 0.3% port· 357K sh· — QoQ· Q2 2026
Added
Hedge Fund
$14.8M· 2.7% of total· 0.0% port· 315K sh· $-3.8M QoQ· Q2 2026
Added
Hedge Fund
$13.5M· 2.5% of total· 2.1% port· 287K sh· +$4.1M QoQ· Q2 2026
Reduced
Hedge Fund
$12.5M· 2.3% of total· 0.0% port· 266K sh· $-27.3M QoQ· Q2 2026
Reduced
Hedge Fund
$7.4M· 1.4% of total· 0.1% port· 157K sh· $-12.5M QoQ· Q2 2026
Added
Hedge Fund
$6.3M· 1.2% of total· 0.0% port· 134K sh· $-9.7M QoQ· Q2 2026
Added
Hedge Fund
$5.9M· 1.1% of total· 0.0% port· 125K sh· +$1.6M QoQ· Q2 2026
Added
Hedge Fund
$5.6M· 1.0% of total· 0.0% port· 120K sh· +$5.1M QoQ· Q2 2026
Added
Hedge Fund
$3.3M· 0.6% of total· 0.0% port· 70K sh· +$701K QoQ· Q2 2026
Reduced
Hedge Fund
$971K· 0.2% of total· 0.0% port· 21K sh· $-698K QoQ· Q2 2026
Added
Hedge Fund
$208K· 0.0% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Added
Hedge Fund
$12K· 0.0% of total· 0.0% port· 258 sh· +$329 QoQ· Q2 2026
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Recent insider activity
Form 4 purchases and sales · 24 Jul 2026 – 21 Oct 20260 buyers · $05 sellers · $2.3M5 transactions
| Insider ⇅ | Trades ⇅ | Bought ⇅ | Sold ⇅ | Largest ⇅ | Latest ▼ | |
|---|---|---|---|---|---|---|
| Barrow Robert Chief Executive Officer | 1 0 buy · 1 sell | — | $1.2M | $1.2M | 25 Sept 2026SEC ↗ | |
| Karlin Daniel Chief Medical Officer | 1 0 buy · 1 sell | — | $397K | $397K | 25 Sept 2026SEC ↗ | |
| Roberts Brandi Chief Financial Officer | 1 0 buy · 1 sell | — | $123K | $123K | 25 Sept 2026SEC ↗ | |
| Sullivan Mark Chief Legal Officer | 1 0 buy · 1 sell | — | $514K | $514K | 25 Sept 2026SEC ↗ | |
| Wiley Matthew T. Chief Commercial Officer | 1 0 buy · 1 sell | — | $113K | $113K | 25 Sept 2026SEC ↗ |
Distinct buyers and sellers may overlap. “Largest” is the largest reported transaction value in this window. Expand a row to see up to five recent filings.