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 | |
|---|---|---|---|---|---|---|
1276
PUT
Norfolk Southern
NSC
$78.9B
| $6.62M | ﹤0.01% |
28,200
+8,800
| +45% | +$2.24M |
|
1277
PUT
EPAM Systems
EPAM
$4.74B
| $6.62M | ﹤0.01% |
28,300
-8,700
| -24% | -$1.94M |
|
1278
PUT
MasTec
MTZ
$27.5B
| $6.62M | ﹤0.01% |
48,600
-44,900
| -48% | -$6.02M |
|
1279
PUT
Dominion Energy
D
$62.5B
| $6.61M | ﹤0.01% |
122,800
-1,300
| -1% | -$74.2K |
|
1280
CALL
Grayscale Bitcoin Trust
GBTC
$9.63B
| $6.61M | ﹤0.01% |
+89,300
| New | +$5.89M |
|
1281
CALL
New Fortress Energy
NFE
$101M
| $6.59M | ﹤0.01% |
436,000
+208,100
| +91% | +$2.16M |
|
1282
PUT
AES
AES
$10.6B
| $6.57M | ﹤0.01% |
510,500
+109,100
| +27% | +$1.63M |
|
1283
PUT
Franklin Resources
BEN
$17B
| $6.56M | ﹤0.01% |
323,300
+258,800
| +401% | +$5.45M |
|
1284
CALL
Wolfspeed
WOLF
$1.21B
| $6.55M | ﹤0.01% |
982,900
+605,200
| +160% | +$6.17M |
|
1285
CALL
First Majestic Silver
AG
$8.14B
| $6.54M | ﹤0.01% |
1,192,000
-110,300
| -8% | -$712K |
|
|
SERV
1286
CALL
Serve Robotics
SERV
$420M
| $6.54M | ﹤0.01% |
484,400
+465,700
| +2,490% | +$4.89M |
|
|
PARA
1287
CALL
DELISTED
Paramount Global Class B
PARA
| $6.52M | ﹤0.01% |
623,500
-209,900
| -25% | -$2.26M |
|
1288
PUT
SharkNinja
SN
$21B
| $6.52M | ﹤0.01% |
67,000
+57,800
| +628% | +$5.9M |
|
|
OKLO
1289
PUT
Oklo
OKLO
$7.11B
| $6.5M | ﹤0.01% |
306,300
+132,700
| +76% | +$2.57M |
|
|
PPLC
1290
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $6.5M | ﹤0.01% |
363,600
+317,200
| +684% | +$5.67M |
|
|
CMA
1291
CALL
DELISTED
Comerica
CMA
| $6.49M | ﹤0.01% |
104,900
-3,900
| -4% | -$254K |
|
1292
PUT
Maplebear
CART
$10B
| $6.48M | ﹤0.01% |
156,500
+3,100
| +2% | +$134K |
|
1293
Novavax
NVAX
$1.24B
| $6.48M | ﹤0.01% |
805,984
-92,836
| -10% | -$895K |
|
|
PARA
1294
PUT
DELISTED
Paramount Global Class B
PARA
| $6.47M | ﹤0.01% |
619,100
-329,900
| -35% | -$3.55M |
|
1295
CALL
Alnylam Pharmaceuticals
ALNY
$36.4B
| $6.47M | ﹤0.01% |
27,500
-10,400
| -27% | -$2.74M |
|
1296
PUT
Schwab US Broad Market ETF
SCHB
$42.9B
| $6.46M | ﹤0.01% |
236,800
-331,100
| -58% | -$7.56M |
|
1297
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $6.44M | ﹤0.01% |
253,800
+6,400
| +3% | +$599K |
|
1298
PUT
Air Products & Chemicals
APD
$66B
| $6.44M | ﹤0.01% |
22,200
-4,500
| -17% | -$1.41M |
|
1299
CALL
TG Therapeutics
TGTX
$8.42B
| $6.43M | ﹤0.01% |
213,800
+2,700
| +1% | +$77.5K |
|
|
GTM
1300
PUT
ZoomInfo Technologies
GTM
$866M
| $6.43M | ﹤0.01% |
611,700
-5,700
| -0.9% | -$60.9K |
|
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.