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 | |
|---|---|---|---|---|---|---|
4826
PUT
John Wiley & Sons Class A
WLY
$2.83B
| $144K | ﹤0.01% |
+3,300
| New | +$162K |
|
|
NAGE
4827
CALL
Niagen Bioscience
NAGE
$256M
| $144K | ﹤0.01% |
27,300
+3,200
| +13% | +$17.5K |
|
4828
CALL
Allegion
ALLE
$13.5B
| $143K | ﹤0.01% |
+1,100
| New | +$156K |
|
4829
CALL
Aemetis
AMTX
$99.2M
| $143K | ﹤0.01% |
53,200
+20,000
| +60% | +$62.9K |
|
4830
CALL
Carlyle Secured Lending
CGBD
$708M
| $143K | ﹤0.01% |
8,000
-2,500
| -24% | -$43.1K |
|
4831
CALL
CONMED
CNMD
$1.3B
| $143K | ﹤0.01% |
2,100
-2,100
| -50% | -$146K |
|
4832
PUT
Cheniere Energy
CQP
$30.5B
| $143K | ﹤0.01% |
2,700
-2,600
| -49% | -$136K |
|
|
DQ
4833
Daqo New Energy
DQ
$810M
| $143K | ﹤0.01% |
7,374
-7,531
| -51% | -$154K |
|
4834
PUT
ESAB
ESAB
$5.37B
| $143K | ﹤0.01% |
1,200
-500
| -29% | -$60.4K |
|
4835
PUT
La-Z-Boy
LZB
$1.64B
| $143K | ﹤0.01% |
3,300
-100
| -3% | -$4.23K |
|
4836
CALL
MiMedx Group
MDXG
$630M
| $143K | ﹤0.01% |
14,900
+13,300
| +831% | +$104K |
|
4837
Mistras Group
MG
$477M
| $143K | ﹤0.01% |
15,823
+13,395
| +552% | +$132K |
|
4838
CALL
Blue Owl Capital
OBDC
$5.35B
| $143K | ﹤0.01% |
9,500
-59,400
| -86% | -$895K |
|
|
FLNA
4839
Filana Therapeutics
FLNA
$42M
| $143K | ﹤0.01% |
+60,921
| New | +$1.07M |
|
4840
Astrana Health
ASTH
$1.81B
| $143K | ﹤0.01% |
4,565
+4,268
| +1,437% | +$203K |
|
4841
CALL
Buckle
BKE
$2.32B
| $142K | ﹤0.01% |
2,800
-6,900
| -71% | -$326K |
|
4842
IMAX
IMAX
$2.67B
| $142K | ﹤0.01% |
5,579
-118,259
| -95% | -$2.78M |
|
|
SEE
4843
PUT
DELISTED
Sealed Air
SEE
| $142K | ﹤0.01% |
4,200
-6,900
| -62% | -$246K |
|
4844
CALL
Acacia Research
ACTG
$437M
| $141K | ﹤0.01% |
32,500
+16,400
| +102% | +$74.3K |
|
4845
Agilon Health
AGL
$1.55B
| $141K | ﹤0.01% |
2,969
+2,645
| +816% | +$160K |
|
|
BDN
4846
CALL
Brandywine Realty Trust
BDN
$505M
| $141K | ﹤0.01% |
25,300
+24,900
| +6,225% | +$139K |
|
|
BBBY
4847
PUT
Bed Bath & Beyond
BBBY
$479M
| $141K | ﹤0.01% |
31,570
-5,170
| -14% | -$32.9K |
|
|
CADE
4848
CALL
DELISTED
Cadence Bank
CADE
| $141K | ﹤0.01% |
4,100
+3,300
| +413% | +$116K |
|
|
CIM
4849
PUT
Chimera Investment
CIM
$1.06B
| $141K | ﹤0.01% |
31,500
+2,300
| +8% | +$34.5K |
|
4850
Genesco
GCO
$434M
| $141K | ﹤0.01% |
+3,315
| New | +$109K |
|
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.