What ARK Investment Management LLC changed, 2016 to 2026
39 quarterly 13F filings, from Q4 2016 to Q2 2026, each read from the filing itself. A quarter is compared only with the quarter before it, so a quarter with no filing is a gap in the record, not a sale.
Reported book
$15.4bn
$275m at Q4 2016
Positions
191
102 at Q4 2016
Top ten weight
39%
49% at Q4 2016
Typical quarterly turnover
about 8%
Estimated from share changes
- Q4 2016: $275m
- Q1 2017: $347m
- Q2 2017: $514m
- Q3 2017: $819m
- Q4 2017: $1.3bn
- Q1 2018: $2.0bn
- Q2 2018: $2.7bn
- Q3 2018: $3.3bn
- Q4 2018: $2.5bn
- Q1 2019: $3.5bn
- Q2 2019: $4.0bn
- Q3 2019: $4.6bn
- Q4 2019: $4.0bn
- Q1 2020: $4.0bn
- Q2 2020: $9.3bn
- Q3 2020: $16.9bn
- Q4 2020: $37.6bn
- Q1 2021: $50.3bn
- Q2 2021: $53.7bn
- Q3 2021: $41.6bn
- Q4 2021: $33.1bn
- Q1 2022: $24.0bn
- Q2 2022: $16.9bn
- Q3 2022: $14.3bn
- Q4 2022: $11.5bn
- Q1 2023: $14.6bn
- Q2 2023: $15.1bn
- Q3 2023: $13.1bn
- Q4 2023: $16.9bn
- Q1 2024: $14.4bn
- Q2 2024: $11.3bn
- Q3 2024: $10.9bn
- Q4 2024: $12.0bn
- Q1 2025: $10.0bn
- Q2 2025: $13.6bn
- Q3 2025: $16.8bn
- Q4 2025: $15.1bn
- Q1 2026: $12.9bn
- Q2 2026: $15.4bn
- Q4 2016: 49%
- Q1 2017: 44%
- Q2 2017: 39%
- Q3 2017: 34%
- Q4 2017: 34%
- Q1 2018: 37%
- Q2 2018: 39%
- Q3 2018: 40%
- Q4 2018: 45%
- Q1 2019: 48%
- Q2 2019: 50%
- Q3 2019: 44%
- Q4 2019: 45%
- Q1 2020: 48%
- Q2 2020: 48%
- Q3 2020: 43%
- Q4 2020: 37%
- Q1 2021: 35%
- Q2 2021: 36%
- Q3 2021: 38%
- Q4 2021: 40%
- Q1 2022: 46%
- Q2 2022: 46%
- Q3 2022: 44%
- Q4 2022: 46%
- Q1 2023: 52%
- Q2 2023: 49%
- Q3 2023: 48%
- Q4 2023: 49%
- Q1 2024: 47%
- Q2 2024: 49%
- Q3 2024: 49%
- Q4 2024: 51%
- Q1 2025: 48%
- Q2 2025: 49%
- Q3 2025: 46%
- Q4 2025: 42%
- Q1 2026: 40%
- Q2 2026: 39%
The positions that defined it
Every position that was ever among the 25 largest: when it first appeared, when it was largest, and where it stands in Q2 2026. The line is its reported value each quarter.
| Position | Value over time | First listed | Largest | Q2 2026 |
|---|---|---|---|---|
| Tesla MTRS Inc(TSLA) | Q3 2017 | $3.9bnQ1 2021 | $1.2bn | |
| Advanced Micro Devices Inc(AMD) | Q3 2018 | $823mQ2 2026 | $823m | |
| Space Exploration Technologies Corp(SPCX) | Q2 2026 | $765mQ2 2026 | $765m | |
| Tempus AI Inc(TEM) | Q2 2024 | $581mQ2 2026 | $581m | |
| Robinhood Markets Inc(HOOD) | Q3 2021 | $729mQ2 2025 | $525m | |
| Crispr Therapeutics AG(CRSP) | Q3 2017 | $1.6bnQ4 2020 | $516m | |
| Shopify Inc(SHOP) | Q3 2017 | $1.8bnQ2 2021 | $475m | |
| Twist Bioscience Corp(TWST) | Q2 2019 | $830mQ4 2020 | $468m | |
| 10X Genomics Inc(TXG) | Q2 2020 | $842mQ2 2021 | $384m | |
| Amazon Com Inc(AMZN) | Q3 2017 | $379mQ2 2026 | $379m | |
| Palantir Technologies Inc(PLTR) | Q4 2020 | $895mQ3 2021 | $375m | |
| Alphabet Inc-cl C(GOOG) | Q3 2017 | $369mQ2 2026 | $369m | |
| Teladoc Inc(TDOC) | Q3 2017 | $2.7bnQ2 2021 | Soldlast listed Q3 2024 | |
| Unity Software Inc(U) | Q3 2020 | $1.5bnQ3 2021 | Soldlast listed Q4 2025 | |
| Twilio Inc(TWLO) | Q3 2017 | $1.5bnQ2 2021 | Soldlast listed Q2 2024 | |
| Zoom Video Communications Inc(ZM) | Q4 2020 | $1.4bnQ2 2021 | Soldlast listed Q3 2024 | |
| Exact Sciences Corp(EXAS) | Q3 2020 | $1.3bnQ2 2021 | Soldlast listed Q4 2025 | |
| UiPath Inc(PATH) | Q2 2021 | $1.3bnQ3 2021 | Soldlast listed Q1 2025 | |
| Invitae Corp | Q3 2017 | $1.2bnQ3 2020 | Soldlast listed Q4 2023 | |
| Twitter Inc | Q3 2017 | $854mQ2 2021 | Soldlast listed Q3 2022 |
Quarter by quarter
Q2 2019: $4.0bn across 229 positions
Against Q1 2019: 53 new, 83 added to, 87 trimmed, 20 sold out, across all 229 positions.
Turnover about 16% of the book, estimated from share changes at quarter-end prices.
Largest additions
- Crispr Therapeutics AG (CRSP)+$56m
- Stratasys LTD (SSYS)+$54m
- Illumina Inc (ILMN)+$53m
- Tesla MTRS Inc (TSLA)+$49m
- Xilinx Inc+$43m
- Nutanix Inc (NTNX)+$30m
- Proto Labs Inc (PRLB)+$24m
- Teladoc Inc (TDOC)+$24m
Largest reductions
- Baidu Inc (BIDU)-$85m
- Medidata Solutions Inc-$81m
- Nvidia Corp (NVDA)-$56m
- Twitter Inc-$41m
- Lendingtree Inc New (TREE)-$34m
- Netflix Inc (NFLX)-$25m
- Apple Inc (AAPL)-$24m
- Tencent Holdings Ltd-uns ADR (TCEHY)-$23m
Opened
- Lendingclub Corp (HAPN)$339m
Sold out
- Lendingclub Corpwas $66m
- Arcturus Therapeutics LTDwas $6.3m
- Pluristem Therapeutics Incwas $3.7m
- Prodways Group SAwas $2.1m
- Renishaw PLCwas $1.8m
- Dassault Systemes Sewas $1.6m
- Meituan Dianpingwas $1.1m
- Hilan LTD (HLTEF)was $527k
Largest positions, Q2 2019
The largest 25 of 229 reported positions.
| Position | Value | Weight | On the quarter |
|---|---|---|---|
| Lendingclub Corp (HAPN) | $339m | 8.5% | New |
| Tesla MTRS Inc (TSLA) | $260m | 6.5% | Added |
| Stratasys LTD (SSYS) | $227m | 5.7% | Added |
| Invitae Corp | $221m | 5.6% | Added |
| Illumina Inc (ILMN) | $198m | 5.0% | Added |
| Square Inc (XYZ) | $182m | 4.6% | Added |
| Nvidia Corp (NVDA) | $176m | 4.4% | Trimmed |
| Intellia Therapeutics Inc (NTLA) | $135m | 3.4% | Added |
| Crispr Therapeutics AG (CRSP) | $128m | 3.2% | Added |
| Editas Medicine Inc (EDIT) | $120m | 3.0% | Added |
| Twitter Inc | $113m | 2.8% | Trimmed |
| Nanostring Technologies Inc | $107m | 2.7% | Added |
| Veracyte Inc (VCYT) | $87m | 2.2% | Trimmed |
| Tencent Holdings Ltd-uns ADR (TCEHY) | $80m | 2.0% | Trimmed |
| Baidu Inc (BIDU) | $74m | 1.9% | Trimmed |
| Spotify Technology SA (SPOT) | $73m | 1.8% | Added |
| Zillow Group Inc - C (Z) | $72m | 1.8% | Trimmed |
| Teladoc Inc (TDOC) | $65m | 1.6% | Added |
| Teradyne Inc (TER) | $64m | 1.6% | Trimmed |
| Splunk Inc | $64m | 1.6% | Added |
| Salesforce Com Inc (CRM) | $63m | 1.6% | Added |
| Xilinx Inc | $55m | 1.4% | Added |
| Proto Labs Inc (PRLB) | $55m | 1.4% | Added |
| Materialise NV (MTLS) | $55m | 1.4% | Added |
| 2u Inc | $53m | 1.3% | Added |
The books most like this one
Among the managers whose filings are on file, at Q2 2026. Overlap is the share of the two books that is the same: for every stock both list, the smaller of its two weights, added up. Two books can overlap because both own the largest companies; it says nothing about whether the managers agree.
| Manager | Overlap | Stocks in both | Overlap over time | |
|---|---|---|---|---|
| Baillie Gifford & Co | 23% | 58 | Compare | |
| T. Rowe Price Associates Inc | at least 18% | 55 | Compare | |
| Coatue Management LLC | 17% | 20 | Compare | |
| Invesco Ltd | at least 17% | 47 | Compare | |
| Fidelity (FMR LLC) | at least 17% | 56 | Compare | |
| Capital World Investors | at least 17% | 56 | Compare | |
| Janus Henderson Group Ltd | at least 16% | 42 | Compare | |
| Maverick Capital Ltd | 16% | 17 | Compare |
“At least” where either manager has more positions than are read each quarter: a stock both hold below that range is not counted.
The filings behind it
Every quarter above is one 13F holdings report, with any amendment the filer made to it applied in the order it was filed. Where the reporting entity changed, each quarter keeps the filer that actually reported it.
| Quarter | Filer | Book | Amended | Filing |
|---|---|---|---|---|
| Q2 2026 | ARK Investment Management LLC | $15.4bn | 13F-HR | |
| Q1 2026 | ARK Investment Management LLC | $12.9bn | 13F-HR | |
| Q4 2025 | ARK Investment Management LLC | $15.1bn | 13F-HR | |
| Q3 2025 | ARK Investment Management LLC | $16.8bn | 13F-HR | |
| Q2 2025 | ARK Investment Management LLC | $13.6bn | 13F-HR | |
| Q1 2025 | ARK Investment Management LLC | $10.0bn | 13F-HR | |
| Q4 2024 | ARK Investment Management LLC | $12.0bn | 13F-HR | |
| Q3 2024 | ARK Investment Management LLC | $10.9bn | 13F-HR | |
| Q2 2024 | ARK Investment Management LLC | $11.3bn | 13F-HR | |
| Q1 2024 | ARK Investment Management LLC | $14.4bn | 13F-HR | |
| Q4 2023 | ARK Investment Management LLC | $16.9bn | 13F-HR | |
| Q3 2023 | ARK Investment Management LLC | $13.1bn | 13F-HR | |
| Q2 2023 | ARK Investment Management LLC | $15.1bn | 13F-HR | |
| Q1 2023 | ARK Investment Management LLC | $14.6bn | 13F-HR | |
| Q4 2022 | ARK Investment Management LLC | $11.5bn | 13F-HR | |
| Q3 2022 | ARK Investment Management LLC | $14.3bn | 13F-HR | |
| Q2 2022 | ARK Investment Management LLC | $16.9bn | 13F-HR | |
| Q1 2022 | ARK Investment Management LLC | $24.0bn | 13F-HR | |
| Q4 2021 | ARK Investment Management LLC | $33.1bn | 13F-HR | |
| Q3 2021 | ARK Investment Management LLC | $41.6bn | 13F-HR | |
| Q2 2021 | ARK Investment Management LLC | $53.7bn | 13F-HR | |
| Q1 2021 | ARK Investment Management LLC | $50.3bn | 13F-HR | |
| Q4 2020 | ARK Investment Management LLC | $37.6bn | 13F-HR | |
| Q3 2020 | ARK Investment Management LLC | $16.9bn | 13F-HR | |
| Q2 2020 | ARK Investment Management LLC | $9.3bn | 13F-HR | |
| Q1 2020 | ARK Investment Management LLC | $4.0bn | 13F-HR | |
| Q4 2019 | ARK Investment Management LLC | $4.0bn | 13F-HR | |
| Q3 2019 | ARK Investment Management LLC | $4.6bn | 13F-HR | |
| Q2 2019 | ARK Investment Management LLC | $4.0bn | 13F-HR | |
| Q1 2019 | ARK Investment Management LLC | $3.5bn | 13F-HR | |
| Q4 2018 | ARK Investment Management LLC | $2.5bn | 13F-HR | |
| Q3 2018 | ARK Investment Management LLC | $3.3bn | 13F-HR | |
| Q2 2018 | ARK Investment Management LLC | $2.7bn | 13F-HR | |
| Q1 2018 | ARK Investment Management LLC | $2.0bn | 13F-HR | |
| Q4 2017 | ARK Investment Management LLC | $1.3bn | 13F-HR | |
| Q3 2017 | ARK Investment Management LLC | $819m | 13F-HR | |
| Q2 2017 | ARK Investment Management LLC | $514m | 13F-HR | |
| Q1 2017 | ARK Investment Management LLC | $347m | 13F-HR | |
| Q4 2016 | ARK Investment Management LLC | $275m | 13F-HR |
Reading this record
A 13F lists US-listed long equity and options at the quarter end, filed up to 45 days later. It shows what was held, not when it was bought or at what price, and nothing short. Where a quarter lists only the largest positions, a name missing from it may still be held below that range; the counts of what was opened and sold always cover the whole filing.
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