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 | |
|---|---|---|---|---|---|---|
4976
Sprott Junior Uranium Miners ETF
URNJ
$319M
| $124K | ﹤0.01% |
+6,724
| New | +$152K |
|
|
LGTY
4977
CALL
DELISTED
Logility Supply Chain Solutions, Inc. Common Stock
LGTY
| $124K | ﹤0.01% |
+11,200
| New | +$122K |
|
|
USAP
4978
DELISTED
Universal Stainless & Alloy
USAP
| $124K | ﹤0.01% |
2,822
+2,366
| +519% | +$102K |
|
4979
CALL
Alpha Pro Tech
APT
$50.7M
| $123K | ﹤0.01% |
23,300
-3,700
| -14% | -$20.3K |
|
4980
CALL
Genmab
GMAB
$17.6B
| $123K | ﹤0.01% |
5,900
+5,600
| +1,867% | +$123K |
|
4981
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.45B
| $123K | ﹤0.01% |
+9,700
| New | +$120K |
|
4982
PUT
Masco
MAS
$14.2B
| $123K | ﹤0.01% |
1,700
-1,100
| -39% | -$88K |
|
4983
Neumora Therapeutics
NMRA
$306M
| $123K | ﹤0.01% |
+11,684
| New | +$140K |
|
4984
Boston Beer
SAM
$1.93B
| $123K | ﹤0.01% |
+413
| New | +$125K |
|
|
USAP
4985
PUT
DELISTED
Universal Stainless & Alloy
USAP
| $123K | ﹤0.01% |
2,800
+1,400
| +100% | +$60.5K |
|
|
ARI
4986
CALL
Apollo Commercial Real Estate
ARI
$851M
| $122K | ﹤0.01% |
14,100
-94,600
| -87% | -$851K |
|
|
BZUN
4987
CALL
Baozun
BZUN
$173M
| $122K | ﹤0.01% |
45,000
-204,100
| -82% | -$617K |
|
4988
CALL
GoodRx Holdings
GDRX
$1.07B
| $122K | ﹤0.01% |
26,300
-18,900
| -42% | -$104K |
|
4989
CALL
Sprout Social
SPT
$509M
| $122K | ﹤0.01% |
4,000
-10,900
| -73% | -$328K |
|
4990
PUT
Ternium
TX
$9.64B
| $122K | ﹤0.01% |
4,200
-10,800
| -72% | -$362K |
|
4991
PUT
Veru
VERU
$35.6M
| $122K | ﹤0.01% |
18,850
+2,580
| +16% | +$19.1K |
|
4992
ProShares VIX Short-Term Futures ETF
VIXY
$206M
| $122K | ﹤0.01% |
+2,718
| New | +$130K |
|
4993
PUT
Asbury Automotive
ABG
$4.34B
| $121K | ﹤0.01% |
500
-6,100
| -92% | -$1.49M |
|
4994
PUT
AGCO
AGCO
$7.76B
| $121K | ﹤0.01% |
1,300
-1,100
| -46% | -$107K |
|
4995
PUT
Cellebrite
CLBT
$3.63B
| $121K | ﹤0.01% |
5,500
+1,100
| +25% | +$21.2K |
|
4996
PUT
Dave Inc
DAVE
$4.8B
| $121K | ﹤0.01% |
+1,400
| New | +$93.8K |
|
4997
CALL
Delcath Systems
DCTH
$416M
| $121K | ﹤0.01% |
10,100
-18,100
| -64% | -$191K |
|
4998
PUT
The Greenbrier Companies
GBX
$1.52B
| $121K | ﹤0.01% |
2,000
-14,500
| -88% | -$884K |
|
4999
PUT
Pliant Therapeutics
PLRX
$65.6M
| $121K | ﹤0.01% |
9,200
-500
| -5% | -$6.83K |
|
5000
Qfin Holdings
QFIN
$1.69B
| $121K | ﹤0.01% |
3,163
-364
| -10% | -$12.6K |
|
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.