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 | |
|---|---|---|---|---|---|---|
|
DESP
4526
CALL
DELISTED
Despegar.com
DESP
| $269K | ﹤0.01% |
22,500
-200
| -0.9% | -$1.89K |
|
4527
PUT
Encore Capital Group
ECPG
$2.01B
| $269K | ﹤0.01% |
5,900
+3,100
| +111% | +$153K |
|
|
CBIO
4528
CALL
Crescent Biopharma
CBIO
$546M
| $269K | ﹤0.01% |
899
+722
| +408% | +$216K |
|
4529
HUB Group
HUBG
$2.92B
| $269K | ﹤0.01% |
6,232
-3,976
| -39% | -$174K |
|
4530
CALL
Mueller Industries
MLI
$14.5B
| $269K | ﹤0.01% |
10,000
+3,200
| +47% | +$79.1K |
|
4531
Qfin Holdings
QFIN
$1.68B
| $269K | ﹤0.01% |
14,632
+10,670
| +269% | +$167K |
|
4532
PUT
Arcus Biosciences
RCUS
$3.33B
| $269K | ﹤0.01% |
14,300
-59,200
| -81% | -$1.02M |
|
4533
PUT
Tandem Diabetes Care
TNDM
$1.27B
| $269K | ﹤0.01% |
7,600
-2,200
| -22% | -$58.9K |
|
4534
CALL
USA Compression Partners
USAC
$3.69B
| $269K | ﹤0.01% |
10,100
+1,000
| +11% | +$25.4K |
|
4535
CALL
Lexicon Pharmaceuticals
LXRX
$1.03B
| $268K | ﹤0.01% |
111,900
+101,900
| +1,019% | +$219K |
|
|
ORC
4536
CALL
Orchid Island Capital
ORC
$1.31B
| $267K | ﹤0.01% |
29,900
+2,600
| +10% | +$22.1K |
|
|
WRK
4537
PUT
DELISTED
WestRock Company
WRK
| $267K | ﹤0.01% |
5,400
-106,200
| -95% | -$4.64M |
|
4538
Axcelis
ACLS
$3.44B
| $266K | ﹤0.01% |
2,387
+858
| +56% | +$102K |
|
4539
CALL
Invesco CurrencyShares Swiss Franc Trust
FXF
$411M
| $266K | ﹤0.01% |
2,700
-1,200
| -31% | -$122K |
|
|
VLD
4540
CALL
DELISTED
Velo3D, Inc.
VLD
| $266K | ﹤0.01% |
16,743
+15,132
| +939% | +$171K |
|
|
SBOW
4541
PUT
DELISTED
SilverBow Resources, Inc.
SBOW
| $266K | ﹤0.01% |
7,800
+4,900
| +169% | +$142K |
|
4542
CALL
Kontoor Brands
KTB
$4.71B
| $265K | ﹤0.01% |
4,400
+500
| +13% | +$29.9K |
|
4543
Pulse Biosciences
PLSE
$2.37B
| $265K | ﹤0.01% |
30,505
-3,788
| -11% | -$34.8K |
|
4544
New Oriental
EDU
$9.32B
| $264K | ﹤0.01% |
3,047
-4,235
| -58% | -$360K |
|
4545
Direxion Daily Regional Banks Bull 3X ETF
DPST
$466M
| $263K | ﹤0.01% |
+3,311
| New | +$258K |
|
4546
CALL
MaxLinear
MXL
$5.19B
| $263K | ﹤0.01% |
14,100
-14,700
| -51% | -$294K |
|
|
LEV
4547
CALL
DELISTED
The Lion Electric Company
LEV
| $263K | ﹤0.01% |
185,500
-23,400
| -11% | -$37.8K |
|
4548
CALL
Adeia
ADEA
$2.55B
| $262K | ﹤0.01% |
24,000
+21,800
| +991% | +$254K |
|
4549
PUT
AerSale
ASLE
$291M
| $262K | ﹤0.01% |
36,500
-4,100
| -10% | -$37.8K |
|
4550
CALL
Kornit Digital
KRNT
$677M
| $262K | ﹤0.01% |
14,500
+10,000
| +222% | +$175K |
|
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.