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 | |
|---|---|---|---|---|---|---|
|
HAYN
4976
DELISTED
Haynes International, Inc.
HAYN
| $180K | ﹤0.01% |
+3,002
| New | +$173K |
|
4977
BlackBerry
BB
$4.98B
| $179K | ﹤0.01% |
+65,006
| New | +$190K |
|
4978
Ecolab
ECL
$78.1B
| $179K | ﹤0.01% |
+779
| New | +$165K |
|
4979
CALL
IAMGOLD
IAG
$8.2B
| $179K | ﹤0.01% |
54,000
+21,400
| +66% | +$57K |
|
4980
PUT
OppFi
OPFI
$800M
| $179K | ﹤0.01% |
71,900
+64,900
| +927% | +$221K |
|
4981
CALL
Ring Energy
REI
$315M
| $179K | ﹤0.01% |
91,600
-247,800
| -73% | -$369K |
|
|
INFN
4982
PUT
DELISTED
Infinera Corporation Common Stock
INFN
| $179K | ﹤0.01% |
+29,700
| New | +$149K |
|
4983
PUT
AudioEye
AEYE
$72.3M
| $178K | ﹤0.01% |
17,800
+3,300
| +23% | +$21.6K |
|
|
CSW
4984
CSW Industrials
CSW
$5.2B
| $178K | ﹤0.01% |
762
+312
| +69% | +$69.5K |
|
4985
Marqeta
MQ
$1.83B
| $178K | ﹤0.01% |
7,488
-5,594
| -43% | -$138K |
|
4986
Prothena Corp
PRTA
$425M
| $178K | ﹤0.01% |
+7,218
| New | +$215K |
|
4987
CALL
Champion Homes
SKY
$4.37B
| $178K | ﹤0.01% |
2,100
+800
| +62% | +$61.8K |
|
|
CVGW
4988
CALL
DELISTED
Calavo Growers
CVGW
| $177K | ﹤0.01% |
6,400
-35,700
| -85% | -$1M |
|
4989
PUT
Globus Medical
GMED
$10.7B
| $177K | ﹤0.01% |
3,300
+3,100
| +1,550% | +$167K |
|
4990
CALL
Wintrust Financial
WTFC
$10.8B
| $177K | ﹤0.01% |
1,700
+1,500
| +750% | +$145K |
|
4991
CALL
Delcath Systems
DCTH
$422M
| $176K | ﹤0.01% |
37,000
+22,100
| +148% | +$95.3K |
|
4992
PUT
Flywire
FLYW
$1.98B
| $176K | ﹤0.01% |
7,100
-10,700
| -60% | -$250K |
|
4993
Invesco Mortgage Capital
IVR
$759M
| $176K | ﹤0.01% |
18,229
-38,599
| -68% | -$346K |
|
|
NVRO
4994
PUT
DELISTED
NEVRO CORP.
NVRO
| $176K | ﹤0.01% |
12,200
-27,000
| -69% | -$446K |
|
4995
Alector
ALEC
$168M
| $175K | ﹤0.01% |
+29,132
| New | +$190K |
|
4996
Cellebrite
CLBT
$3.68B
| $175K | ﹤0.01% |
15,877
-37,362
| -70% | -$381K |
|
4997
CALL
Driven Brands
DRVN
$2.35B
| $175K | ﹤0.01% |
11,100
+1,800
| +19% | +$24.9K |
|
4998
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.84B
| $175K | ﹤0.01% |
+6,164
| New | +$154K |
|
4999
PUT
Highwoods Properties
HIW
$3.65B
| $175K | ﹤0.01% |
6,700
+5,000
| +294% | +$118K |
|
5000
PUT
MillerKnoll
MLKN
$1.53B
| $175K | ﹤0.01% |
7,100
+6,300
| +788% | +$177K |
|
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.