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 | |
|---|---|---|---|---|---|---|
4751
Aemetis
AMTX
$99.2M
| $155K | ﹤0.01% |
57,623
+18,776
| +48% | +$59K |
|
|
BGFV
4752
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $155K | ﹤0.01% |
86,700
+47,400
| +121% | +$86.9K |
|
4753
Direxion Daily Healthcare Bull 3X ETF
CURE
$190M
| $155K | ﹤0.01% |
+1,683
| New | +$190K |
|
4754
CALL
Deluxe
DLX
$1.25B
| $155K | ﹤0.01% |
6,900
+1,900
| +38% | +$40.8K |
|
4755
Extreme Networks
EXTR
$3.8B
| $155K | ﹤0.01% |
9,270
+4,638
| +100% | +$75K |
|
4756
CALL
Red Robin
RRGB
$139M
| $155K | ﹤0.01% |
28,400
+27,700
| +3,957% | +$150K |
|
4757
PUT
Sally Beauty Holdings
SBH
$1.47B
| $155K | ﹤0.01% |
14,900
-9,100
| -38% | -$116K |
|
|
CMRX
4758
DELISTED
Chimerix, Inc.
CMRX
| $155K | ﹤0.01% |
44,686
+24,380
| +120% | +$34.4K |
|
|
HELP
4759
Cybin Inc
HELP
$490M
| $154K | ﹤0.01% |
+17,563
| New | +$178K |
|
4760
PUT
First Trust Exchange-Traded Fund VI Multi-Asset Diversified Income Index Fund
MDIV
$431M
| $154K | ﹤0.01% |
2,100
+1,600
| +320% | +$26.4K |
|
|
PPTA
4761
Perpetua Resources
PPTA
$2.16B
| $154K | ﹤0.01% |
14,464
-100
| -0.7% | -$1.03K |
|
|
USAP
4762
CALL
DELISTED
Universal Stainless & Alloy
USAP
| $154K | ﹤0.01% |
+3,500
| New | +$151K |
|
4763
CoinShares ETF Trust CoinShares Bitcoin and Ether ETF
BTF
$13.8M
| $153K | ﹤0.01% |
2,097
+1,537
| +274% | +$150K |
|
|
MFA
4764
CALL
MFA Financial
MFA
$932M
| $153K | ﹤0.01% |
15,100
+12,500
| +481% | +$143K |
|
4765
CALL
Rockwell Medical
RMTI
$27.2M
| $153K | ﹤0.01% |
7,520
+380
| +5% | +$11.1K |
|
4766
PUT
Rush Enterprises Class A
RUSHA
$6.34B
| $153K | ﹤0.01% |
2,800
| – | – |
|
4767
PUT
Tanger
SKT
$4.78B
| $153K | ﹤0.01% |
4,500
+4,100
| +1,025% | +$143K |
|
4768
Concentrix
CNXC
$1.62B
| $152K | ﹤0.01% |
+3,513
| New | +$156K |
|
|
CRESY
4769
Cresud
CRESY
$806M
| $152K | ﹤0.01% |
12,205
+7,710
| +172% | +$84K |
|
4770
PUT
Fortuna Silver Mines
FSM
$2.54B
| $152K | ﹤0.01% |
35,500
-31,000
| -47% | -$148K |
|
4771
CALL
Hyliion Holdings
HYLN
$578M
| $152K | ﹤0.01% |
58,300
+44,000
| +308% | +$122K |
|
4772
CALL
IDT Corp
IDT
$1.67B
| $152K | ﹤0.01% |
3,200
| – | – |
|
4773
PUT
Illinois Tool Works
ITW
$84.1B
| $152K | ﹤0.01% |
600
-13,300
| -96% | -$3.53M |
|
|
SHCO
4774
CALL
DELISTED
Soho House & Co
SHCO
| $152K | ﹤0.01% |
20,500
+16,900
| +469% | +$92K |
|
4775
CALL
Amylyx Pharmaceuticals
AMLX
$2.19B
| $151K | ﹤0.01% |
40,100
+31,800
| +383% | +$150K |
|
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.