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 | |
|---|---|---|---|---|---|---|
|
SAFE
5576
PUT
Safehold
SAFE
$1.16B
| $66K | ﹤0.01% |
3,600
-8,600
| -70% | -$187K |
|
5577
SLR Investment Corp
SLRC
$686M
| $66K | ﹤0.01% |
+4,089
| New | +$65K |
|
|
STKL
5578
CALL
DELISTED
SunOpta
STKL
| $66K | ﹤0.01% |
8,600
+5,300
| +161% | +$37.5K |
|
5579
Ibotta
IBTA
$559M
| $66K | ﹤0.01% |
1,021
-262
| -20% | -$18.2K |
|
5580
Arbutus Biopharma
ABUS
$857M
| $65K | ﹤0.01% |
19,907
-45,387
| -70% | -$167K |
|
5581
CALL
American Coastal Insurance
ACIC
$515M
| $65K | ﹤0.01% |
4,900
-70,500
| -94% | -$881K |
|
5582
Alignment Healthcare
ALHC
$3.08B
| $65K | ﹤0.01% |
+5,840
| New | +$68.3K |
|
5583
Allegion
ALLE
$13.4B
| $65K | ﹤0.01% |
503
-699
| -58% | -$98.9K |
|
5584
CALL
Bio-Rad Laboratories Class A
BIO
$8.71B
| $65K | ﹤0.01% |
200
+100
| +100% | +$33.9K |
|
|
CCRN
5585
CALL
DELISTED
Cross Country Healthcare
CCRN
| $65K | ﹤0.01% |
+3,600
| New | +$48.5K |
|
|
EFC
5586
PUT
Ellington Financial
EFC
$1.67B
| $65K | ﹤0.01% |
5,400
-4,400
| -45% | -$54.4K |
|
5587
CALL
4D Molecular Therapeutics
FDMT
$532M
| $65K | ﹤0.01% |
11,800
+5,800
| +97% | +$45.5K |
|
5588
Gold Royalty Corp
GROY
$600M
| $65K | ﹤0.01% |
54,385
+23,346
| +75% | +$31.2K |
|
5589
PUT
Hartford Financial Services
HIG
$38.9B
| $65K | ﹤0.01% |
600
-5,900
| -91% | -$684K |
|
5590
Houlihan Lokey
HLI
$8.77B
| $65K | ﹤0.01% |
+375
| New | +$66K |
|
5591
CALL
Magnachip Semiconductor
MX
$119M
| $65K | ﹤0.01% |
16,200
-100
| -0.6% | -$426 |
|
5592
PUT
Oportun Financial
OPRT
$255M
| $65K | ﹤0.01% |
17,000
-54,100
| -76% | -$174K |
|
5593
CALL
Rani Therapeutics
RANI
$87M
| $65K | ﹤0.01% |
47,900
+47,300
| +7,883% | +$99.4K |
|
|
SRDX
5594
DELISTED
Surmodics
SRDX
| $65K | ﹤0.01% |
1,647
-1,819
| -52% | -$70.7K |
|
5595
PUT
STAAR Surgical
STAA
$1.21B
| $65K | ﹤0.01% |
2,700
-12,800
| -83% | -$366K |
|
|
SVC
5596
Service Properties Trust
SVC
$1.04B
| $65K | ﹤0.01% |
5,151
+3,436
| +200% | +$55.5K |
|
5597
CALL
Vir Biotechnology
VIR
$1.46B
| $65K | ﹤0.01% |
8,900
-17,600
| -66% | -$139K |
|
5598
PUT
Aclaris Therapeutics
ACRS
$726M
| $64K | ﹤0.01% |
25,900
+20,900
| +418% | +$52K |
|
5599
CALL
Aegon
AEG
$14B
| $64K | ﹤0.01% |
+10,900
| New | +$68.3K |
|
5600
CALL
Algonquin Power & Utilities
AQN
$4.49B
| $64K | ﹤0.01% |
14,500
-58,700
| -80% | -$283K |
|
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.