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 | |
|---|---|---|---|---|---|---|
5076
CALL
First Watch Restaurant Group
FWRG
$792M
| $160K | ﹤0.01% |
+6,500
| New | +$147K |
|
5077
PUT
Everspin Technologies
MRAM
$341M
| $160K | ﹤0.01% |
20,300
+15,400
| +314% | +$131K |
|
|
PBT
5078
Permian Basin Royalty Trust
PBT
$1.38B
| $160K | ﹤0.01% |
13,234
+11,489
| +658% | +$156K |
|
5079
Papa John's
PZZA
$984M
| $160K | ﹤0.01% |
2,414
-5,178
| -68% | -$374K |
|
5080
PUT
RadNet
RDNT
$5.02B
| $160K | ﹤0.01% |
3,300
| – | – |
|
5081
CALL
Sixth Street Specialty
TSLX
$1.63B
| $160K | ﹤0.01% |
7,500
+7,300
| +3,650% | +$157K |
|
|
AGS
5082
PUT
DELISTED
PlayAGS
AGS
| $159K | ﹤0.01% |
+17,800
| New | +$156K |
|
5083
PUT
Dolby
DLB
$5.56B
| $159K | ﹤0.01% |
1,900
-4,200
| -69% | -$347K |
|
|
EXK
5084
Endeavour Silver
EXK
$2.23B
| $159K | ﹤0.01% |
66,070
+30,063
| +83% | +$53.5K |
|
5085
Extreme Networks
EXTR
$3.94B
| $159K | ﹤0.01% |
13,820
-3,728
| -21% | -$50.8K |
|
5086
PUT
International Seaways
INSW
$4.76B
| $159K | ﹤0.01% |
3,000
-8,800
| -75% | -$456K |
|
5087
CALL
Kura Oncology
KURA
$800M
| $159K | ﹤0.01% |
7,500
+6,200
| +477% | +$121K |
|
|
LADR
5088
CALL
Ladder Capital
LADR
$1.21B
| $159K | ﹤0.01% |
14,300
+3,700
| +35% | +$40.6K |
|
5089
PUT
Qiagen
QGEN
$8.54B
| $159K | ﹤0.01% |
3,597
+956
| +36% | +$43.6K |
|
|
CUTR
5090
PUT
DELISTED
Cutera, Inc.
CUTR
| $159K | ﹤0.01% |
108,200
+58,300
| +117% | +$151K |
|
5091
Madrigal Pharmaceuticals
MDGL
$10.8B
| $158K | ﹤0.01% |
593
-3,341
| -85% | -$787K |
|
|
SNCY
5092
DELISTED
Sun Country Airlines
SNCY
| $158K | ﹤0.01% |
10,527
-121,662
| -92% | -$1.75M |
|
|
OCEA
5093
PUT
DELISTED
Ocean Biomedical, Inc. Common Stock
OCEA
| $158K | ﹤0.01% |
42,000
+38,200
| +1,005% | +$71.8K |
|
|
HITI
5094
High Tide
HITI
$186M
| $157K | ﹤0.01% |
77,350
+46,878
| +154% | +$84K |
|
|
KLG
5095
CALL
DELISTED
WK Kellogg Co
KLG
| $157K | ﹤0.01% |
8,400
-38,900
| -82% | -$566K |
|
5096
PUT
Oxford Industries
OXM
$566M
| $157K | ﹤0.01% |
+1,400
| New | +$141K |
|
5097
Royal Gold
RGLD
$16.8B
| $157K | ﹤0.01% |
+1,291
| New | +$146K |
|
5098
PUT
TETRA Technologies
TTI
$1.14B
| $157K | ﹤0.01% |
35,600
+29,300
| +465% | +$122K |
|
5099
Vanguard Morningstar Small-Cap Growth ETF
VBK
$23.1B
| $157K | ﹤0.01% |
603
-33,278
| -98% | -$8.17M |
|
5100
CALL
Oceaneering
OII
$4.86B
| $156K | ﹤0.01% |
6,700
+2,600
| +63% | +$54.6K |
|
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.