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 | |
|---|---|---|---|---|---|---|
4551
Navitas Semiconductor
NVTS
$2.54B
| $262K | ﹤0.01% |
55,130
-4,497
| -8% | -$26.4K |
|
4552
CALL
Vera Bradley
VRA
$98.7M
| $262K | ﹤0.01% |
38,600
+20,500
| +113% | +$150K |
|
4553
CALL
Evolus
EOLS
$397M
| $261K | ﹤0.01% |
18,700
-93,700
| -83% | -$1.22M |
|
4554
-1x Short VIX Futures ETF
SVIX
$159M
| $261K | ﹤0.01% |
6,171
-6,716
| -52% | -$267K |
|
|
INFN
4555
DELISTED
Infinera Corporation Common Stock
INFN
| $261K | ﹤0.01% |
43,406
+3,761
| +9% | +$18.9K |
|
4556
Janux Therapeutics
JANX
$912M
| $260K | ﹤0.01% |
+6,909
| New | +$150K |
|
|
MFA
4557
PUT
MFA Financial
MFA
$932M
| $260K | ﹤0.01% |
22,800
-5,800
| -20% | -$65K |
|
4558
CALL
New Fortress Energy
NFE
$92.9M
| $260K | ﹤0.01% |
8,500
+4,700
| +124% | +$154K |
|
4559
PUT
WPP
WPP
$4.67B
| $260K | ﹤0.01% |
5,500
+2,800
| +104% | +$132K |
|
|
WPRT
4560
CALL
Westport Fuel Systems
WPRT
$31.9M
| $260K | ﹤0.01% |
38,700
+15,600
| +68% | +$94.7K |
|
4561
Boston Scientific
BSX
$68.4B
| $259K | ﹤0.01% |
+3,783
| New | +$243K |
|
4562
PUT
Kratos Defense & Security Solutions
KTOS
$8.23B
| $259K | ﹤0.01% |
14,100
+12,100
| +605% | +$220K |
|
4563
Altria Group
MO
$125B
| $259K | ﹤0.01% |
+5,957
| New | +$247K |
|
4564
CALL
System1
SST
$14.3M
| $259K | ﹤0.01% |
13,240
+9,450
| +249% | +$161K |
|
4565
PUT
Tiptree Inc
TIPT
$687M
| $259K | ﹤0.01% |
15,000
-900
| -6% | -$16.1K |
|
4566
Algonquin Power & Utilities
AQN
$4.59B
| $258K | ﹤0.01% |
40,870
-257
| -0.6% | -$1.56K |
|
4567
Bitwise Crypto Industry Innovators ETF
BITQ
$355M
| $258K | ﹤0.01% |
19,642
+10,934
| +126% | +$118K |
|
4568
CALL
C4 Therapeutics
CCCC
$389M
| $258K | ﹤0.01% |
31,700
-61,300
| -66% | -$475K |
|
4569
PUT
Green Brick Partners
GRBK
$3.09B
| $258K | ﹤0.01% |
4,300
-6,700
| -61% | -$359K |
|
4570
Liquidia Corp
LQDA
$7.72B
| $258K | ﹤0.01% |
17,513
-82,938
| -83% | -$1.15M |
|
4571
Merit Medical Systems
MMSI
$4.82B
| $258K | ﹤0.01% |
3,406
+2,846
| +508% | +$220K |
|
4572
PUT
UFP Industries
UFPI
$4.95B
| $258K | ﹤0.01% |
2,100
+1,100
| +110% | +$128K |
|
|
BPMC
4573
DELISTED
Blueprint Medicines
BPMC
| $257K | ﹤0.01% |
+2,715
| New | +$233K |
|
4574
CALL
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
| $257K | ﹤0.01% |
11,200
-71,900
| -87% | -$1.6M |
|
4575
AST SpaceMobile
ASTS
$15.8B
| $256K | ﹤0.01% |
88,286
-86,254
| -49% | -$290K |
|
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.