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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1401
CALL
Wolfspeed
WOLF
$1.2B
| $6.49M | ﹤0.01% |
220,000
-81,400
| -27% | -$2.45M |
|
1402
CALL
Rapid7
RPD
$634M
| $6.49M | ﹤0.01% |
132,300
+99,400
| +302% | +$5.45M |
|
1403
Trane Technologies
TT
$106B
| $6.48M | ﹤0.01% |
21,580
-679
| -3% | -$184K |
|
1404
CALL
Concentrix
CNXC
$1.36B
| $6.48M | ﹤0.01% |
97,800
+63,400
| +184% | +$5.15M |
|
1405
American International
AIG
$41.9B
| $6.47M | ﹤0.01% |
+82,792
| New | +$5.91M |
|
1406
CALL
Lucid Motors
LCID
$2.46B
| $6.47M | ﹤0.01% |
227,080
-39,310
| -15% | -$1.25M |
|
1407
CALL
State Street
STT
$50.9B
| $6.47M | ﹤0.01% |
83,700
-46,200
| -36% | -$3.43M |
|
|
K
1408
PUT
DELISTED
Kellanova
K
| $6.47M | ﹤0.01% |
129,900
-29,900
| -19% | -$1.65M |
|
1409
CALL
Navios Maritime Partners
NMM
$2.25B
| $6.45M | ﹤0.01% |
151,300
+80,300
| +113% | +$2.69M |
|
1410
PUT
Shake Shack
SHAK
$2.3B
| $6.44M | ﹤0.01% |
61,900
-2,300
| -4% | -$201K |
|
1411
PUT
Bunge Global
BG
$23.6B
| $6.44M | ﹤0.01% |
62,800
-23,200
| -27% | -$2.17M |
|
1412
PUT
Cenovus Energy
CVE
$54.6B
| $6.44M | ﹤0.01% |
322,100
+128,000
| +66% | +$2.19M |
|
|
APLS
1413
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $6.44M | ﹤0.01% |
109,500
-231,100
| -68% | -$14.7M |
|
1414
PUT
Western Midstream Partners
WES
$19.6B
| $6.42M | ﹤0.01% |
180,600
+177,000
| +4,917% | +$5.49M |
|
1415
PUT
BridgeBio Pharma
BBIO
$16.5B
| $6.41M | ﹤0.01% |
207,400
+87,900
| +74% | +$2.99M |
|
1416
PUT
HSBC
HSBC
$355B
| $6.41M | ﹤0.01% |
162,800
-97,100
| -37% | -$3.79M |
|
1417
CALL
Citizens Financial Group
CFG
$30.4B
| $6.4M | ﹤0.01% |
176,400
+30,100
| +21% | +$987K |
|
|
1418
CALL
BridgeBio Pharma
BBIO
$16.5B
| $6.4M | ﹤0.01% |
207,000
+58,200
| +39% | +$1.98M |
|
1419
PUT
Harley-Davidson
HOG
$2.68B
| $6.39M | ﹤0.01% |
146,200
-166,200
| -53% | -$6.15M |
|
1420
CALL
Ventas
VTR
$48.9B
| $6.39M | ﹤0.01% |
146,800
+118,800
| +424% | +$5.4M |
|
1421
PUT
Ciena
CIEN
$55.3B
| $6.38M | ﹤0.01% |
129,100
+48,100
| +59% | +$2.54M |
|
1422
CALL
Aptiv
APTV
$12B
| $6.38M | ﹤0.01% |
80,100
-19,300
| -19% | -$1.56M |
|
|
1423
PUT
Concentrix
CNXC
$1.36B
| $6.38M | ﹤0.01% |
96,300
+64,300
| +201% | +$5.22M |
|
1424
Antero Resources
AR
$10.9B
| $6.38M | ﹤0.01% |
219,840
-7,930
| -3% | -$191K |
|
1425
APA Corp
APA
$12.8B
| $6.36M | ﹤0.01% |
185,084
+60,440
| +48% | +$1.92M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.