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 | |
|---|---|---|---|---|---|---|
6576
Regional Management Corp
RM
$302M
| $23K | ﹤0.01% |
+694
| New | +$21.8K |
|
6577
PUT
Rollins
ROL
$18.3B
| $23K | ﹤0.01% |
500
-600
| -55% | -$29.4K |
|
|
SNCR
6578
CALL
DELISTED
Synchronoss Technologies
SNCR
| $23K | ﹤0.01% |
2,400
-1,600
| -40% | -$17K |
|
|
SPTN
6579
PUT
DELISTED
SpartanNash
SPTN
| $23K | ﹤0.01% |
1,300
-4,500
| -78% | -$89.9K |
|
6580
CALL
Gentherm
THRM
$1.24B
| $23K | ﹤0.01% |
600
-5,500
| -90% | -$231K |
|
6581
CALL
Teekay
TK
$1.02B
| $23K | ﹤0.01% |
3,400
-6,600
| -66% | -$50.9K |
|
6582
PUT
Teekay Tankers
TNK
$2.76B
| $23K | ﹤0.01% |
600
-26,500
| -98% | -$1.23M |
|
6583
PUT
Tenaya Therapeutics
TNYA
$161M
| $23K | ﹤0.01% |
+16,700
| New | +$37.4K |
|
6584
T-REX 2X Long Tesla Daily Target ETF
TSLT
$126M
| $23K | ﹤0.01% |
+619
| New | +$16.8K |
|
6585
2x Long VIX Futures ETF
UVIX
$246M
| $23K | ﹤0.01% |
34
-644
| -95% | -$548K |
|
6586
CALL
Veracyte
VCYT
$3.75B
| $23K | ﹤0.01% |
600
+300
| +100% | +$11.4K |
|
6587
PUT
VOC Energy
VOC
$50.7M
| $23K | ﹤0.01% |
4,900
| – | – |
|
|
VXRT
6588
CALL
DELISTED
Vaxart
VXRT
| $23K | ﹤0.01% |
35,500
-31,000
| -47% | -$21.5K |
|
|
WPRT
6589
CALL
Westport Fuel Systems
WPRT
$33.4M
| $23K | ﹤0.01% |
6,600
+4,300
| +187% | +$18K |
|
|
LUNA
6590
DELISTED
Luna Innovations Incorporated
LUNA
| $23K | ﹤0.01% |
+10,806
| New | +$19.1K |
|
6591
PUT
America Movil
AMX
$76.3B
| $22K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$23.2K |
|
6592
Ampco-Pittsburgh
AP
$164M
| $22K | ﹤0.01% |
10,920
-3,828
| -26% | -$7.28K |
|
6593
CALL
Bright Horizons
BFAM
$3.92B
| $22K | ﹤0.01% |
200
-900
| -82% | -$108K |
|
|
BRSP
6594
CALL
BrightSpire Capital
BRSP
$634M
| $22K | ﹤0.01% |
4,000
+2,300
| +135% | +$13.6K |
|
6595
CALL
Cemex
CX
$17B
| $22K | ﹤0.01% |
4,000
-18,100
| -82% | -$103K |
|
6596
PUT
VanEck Energy Income ETF
EINC
$78.2M
| $22K | ﹤0.01% |
1,400
+1,000
| +250% | +$92.7K |
|
6597
Invesco S&P 100 Equal Weight ETF
EQWL
$2.7B
| $22K | ﹤0.01% |
220
+144
| +189% | +$15K |
|
6598
Future Fuel
FF
$218M
| $22K | ﹤0.01% |
4,312
-2,762
| -39% | -$15.4K |
|
6599
PUT
Fresenius Medical Care
FMS
$13.8B
| $22K | ﹤0.01% |
1,000
-3,100
| -76% | -$67.3K |
|
|
LKFT
6600
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.78B
| $22K | ﹤0.01% |
800
-600
| -43% | -$16.7K |
|
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.