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 | |
|---|---|---|---|---|---|---|
2301
PUT
Organon & Co
OGN
$3.55B
| $1.77M | ﹤0.01% |
118,800
+11,100
| +10% | +$181K |
|
2302
CALL
SL Green Realty
SLG
$3.88B
| $1.77M | ﹤0.01% |
26,100
-34,000
| -57% | -$2.51M |
|
|
JNPR
2303
PUT
DELISTED
Juniper Networks
JNPR
| $1.77M | ﹤0.01% |
47,300
+26,100
| +123% | +$987K |
|
2304
CALL
AAR Corp
AIR
$5.15B
| $1.77M | ﹤0.01% |
28,900
+27,800
| +2,527% | +$1.78M |
|
2305
Frontline
FRO
$8.75B
| $1.77M | ﹤0.01% |
124,616
+93,261
| +297% | +$1.75M |
|
2306
PUT
PVH
PVH
$3.71B
| $1.77M | ﹤0.01% |
16,700
-36,600
| -69% | -$3.75M |
|
2307
CALL
Viasat
VSAT
$9.79B
| $1.76M | ﹤0.01% |
207,500
+126,700
| +157% | +$1.22M |
|
2308
CALL
Anavex Life Sciences
AVXL
$222M
| $1.76M | ﹤0.01% |
164,300
+5,400
| +3% | +$41.5K |
|
2309
GE HealthCare
GEHC
$27.6B
| $1.76M | ﹤0.01% |
+22,515
| New | +$1.91M |
|
2310
Rithm Capital
RITM
$5.09B
| $1.76M | ﹤0.01% |
162,400
+96,126
| +145% | +$1.04M |
|
2311
CALL
Xerox
XRX
$337M
| $1.75M | ﹤0.01% |
208,300
-49,300
| -19% | -$455K |
|
2312
CALL
Ingersoll Rand
IR
$33B
| $1.75M | ﹤0.01% |
19,400
-64,100
| -77% | -$6.38M |
|
2313
Transmedics
TMDX
$2.5B
| $1.75M | ﹤0.01% |
28,146
+25,563
| +990% | +$2.38M |
|
2314
CALL
Guidewire Software
GWRE
$11.5B
| $1.75M | ﹤0.01% |
10,400
-27,900
| -73% | -$5.21M |
|
2315
PUT
Icahn Enterprises
IEP
$5.17B
| $1.75M | ﹤0.01% |
202,000
+23,200
| +13% | +$281K |
|
2316
CALL
HDFC Bank
HDB
$119B
| $1.75M | ﹤0.01% |
54,800
-28,000
| -34% | -$896K |
|
2317
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $1.75M | ﹤0.01% |
50,000
+14,100
| +39% | +$527K |
|
|
CIVI
2318
PUT
DELISTED
Civitas Resources
CIVI
| $1.75M | ﹤0.01% |
38,100
-6,600
| -15% | -$329K |
|
2319
CALL
Dentsply Sirona
XRAY
$2.59B
| $1.74M | ﹤0.01% |
91,900
-83,700
| -48% | -$1.77M |
|
2320
CALL
SSR Mining
SSRM
$5.57B
| $1.74M | ﹤0.01% |
250,200
+36,000
| +17% | +$224K |
|
2321
Talos Energy
TALO
$2.49B
| $1.74M | ﹤0.01% |
179,337
+67,842
| +61% | +$714K |
|
2322
PUT
Avantor
AVTR
$7.81B
| $1.74M | ﹤0.01% |
82,400
-260,500
| -76% | -$5.86M |
|
2323
CALL
Denison Mines
DNN
$2.63B
| $1.74M | ﹤0.01% |
964,500
+526,700
| +120% | +$1.11M |
|
2324
PUT
Humacyte
HUMA
$168M
| $1.74M | ﹤0.01% |
343,700
+117,200
| +52% | +$580K |
|
|
MASI
2325
PUT
DELISTED
Masimo
MASI
| $1.74M | ﹤0.01% |
10,500
-38,400
| -79% | -$6.06M |
|
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.