Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6401
Autohome
ATHM
$2.67B
| $28K | ﹤0.01% |
+1,081
| New | +$31.1K |
|
6402
AXT Inc
AXTI
$3.95B
| $28K | ﹤0.01% |
13,273
+4,032
| +44% | +$9.15K |
|
6403
PUT
Bank of Hawaii
BOH
$3.15B
| $28K | ﹤0.01% |
400
-900
| -69% | -$65K |
|
6404
PUT
Cabaletta Bio
CABA
$437M
| $28K | ﹤0.01% |
12,400
-2,500
| -17% | -$8.78K |
|
6405
PUT
Crexendo
CXDO
$223M
| $28K | ﹤0.01% |
5,500
+5,200
| +1,733% | +$27.5K |
|
|
DADA
6406
DELISTED
Dada Nexus
DADA
| $28K | ﹤0.01% |
23,652
-19,675
| -45% | -$31.4K |
|
6407
PUT
Flywire
FLYW
$1.98B
| $28K | ﹤0.01% |
1,400
-13,000
| -90% | -$254K |
|
6408
PUT
FingerMotion
FNGR
$16.6M
| $28K | ﹤0.01% |
23,600
+15,600
| +195% | +$30.2K |
|
|
FPI
6409
PUT
Farmland Partners
FPI
$408M
| $28K | ﹤0.01% |
2,400
| – | – |
|
|
TDAY
6410
PUT
USA Today Co
TDAY
$1.27B
| $28K | ﹤0.01% |
5,600
-49,600
| -90% | -$264K |
|
6411
CALL
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$151M
| $28K | ﹤0.01% |
2,900
-4,300
| -60% | -$114K |
|
6412
PUT
Ichor Holdings
ICHR
$2.62B
| $28K | ﹤0.01% |
900
-1,100
| -55% | -$34K |
|
|
JFIN
6413
Jiayin Group
JFIN
$113M
| $28K | ﹤0.01% |
4,548
-4,476
| -50% | -$29.9K |
|
6414
Invesco KBW Property & Casualty Insurance ETF
KBWP
$267M
| $28K | ﹤0.01% |
+248
| New | +$29.4K |
|
6415
PUT
Lightwave Logic
LWLG
$995M
| $28K | ﹤0.01% |
13,400
-12,500
| -48% | -$35.8K |
|
6416
CALL
Mayville Engineering Co
MEC
$654M
| $28K | ﹤0.01% |
+1,800
| New | +$32.9K |
|
6417
CALL
Roundhill Ball Metaverse ETF
METV
$209M
| $28K | ﹤0.01% |
2,000
-6,700
| -77% | -$94.3K |
|
6418
Mitsubishi UFJ Financial
MUFG
$253B
| $28K | ﹤0.01% |
2,433
-6,529
| -73% | -$73.4K |
|
|
NLOP
6419
PUT
Net Lease Office Properties
NLOP
$173M
| $28K | ﹤0.01% |
900
-200
| -18% | -$6.22K |
|
6420
OPAL Fuels
OPAL
$71.3M
| $28K | ﹤0.01% |
8,484
+5,534
| +188% | +$20.2K |
|
6421
CALL
Orion Group Holdings
ORN
$396M
| $28K | ﹤0.01% |
3,900
-3,300
| -46% | -$23.9K |
|
6422
CALL
Park Hotels & Resorts
PK
$3.03B
| $28K | ﹤0.01% |
2,000
-31,700
| -94% | -$465K |
|
6423
CALL
ProQR Therapeutics
PRQR
$243M
| $28K | ﹤0.01% |
10,900
-71,100
| -87% | -$226K |
|
|
SCS
6424
PUT
DELISTED
Steelcase
SCS
| $28K | ﹤0.01% |
2,400
-7,200
| -75% | -$92.6K |
|
6425
ProShares UltraShort Russell2000
TWM
$44.3M
| $28K | ﹤0.01% |
648
-322
| -33% | -$13.8K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.