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 | |
|---|---|---|---|---|---|---|
6926
Astronics
ATRO
$3.21B
| $24K | ﹤0.01% |
1,550
-1,832
| -54% | -$27.2K |
|
6927
CALL
Avnet
AVT
$6.86B
| $24K | ﹤0.01% |
500
-1,400
| -74% | -$65.6K |
|
6928
PUT
Azenta
AZTA
$1.3B
| $24K | ﹤0.01% |
400
-200
| -33% | -$12.8K |
|
6929
Barings BDC
BBDC
$869M
| $24K | ﹤0.01% |
2,674
-3,542
| -57% | -$32.3K |
|
6930
Brady Corp
BRC
$4.46B
| $24K | ﹤0.01% |
+417
| New | +$24.9K |
|
6931
VanEck Brazil Small-Cap ETF
BRF
$21.5M
| $24K | ﹤0.01% |
1,462
+937
| +178% | +$15.5K |
|
6932
PUT
Crane NXT
CXT
$2.99B
| $24K | ﹤0.01% |
400
-31,200
| -99% | -$1.83M |
|
6933
PUT
DT Midstream
DTM
$13.9B
| $24K | ﹤0.01% |
+400
| New | +$22.3K |
|
|
EB
6934
PUT
DELISTED
Eventbrite
EB
| $24K | ﹤0.01% |
4,500
+1,200
| +36% | +$8.7K |
|
6935
PUT
eHealth
EHTH
$41.9M
| $24K | ﹤0.01% |
4,000
+2,600
| +186% | +$17.3K |
|
6936
EMQQ The Emerging Markets Internet & Ecommerce ETF
EMQQ
$269M
| $24K | ﹤0.01% |
777
+547
| +238% | +$16.5K |
|
6937
CALL
Essex Property Trust
ESS
$19.1B
| $24K | ﹤0.01% |
100
-1,800
| -95% | -$428K |
|
|
HYPD
6938
Hyperion DeFi Inc
HYPD
$35.5M
| $24K | ﹤0.01% |
316
+249
| +372% | +$33.9K |
|
6939
PUT
First American
FAF
$7.98B
| $24K | ﹤0.01% |
400
-300
| -43% | -$17.7K |
|
6940
CALL
Hackett Group
HCKT
$281M
| $24K | ﹤0.01% |
+1,000
| New | +$23.7K |
|
6941
CALL
IDEX
IEX
$17B
| $24K | ﹤0.01% |
100
| – | – |
|
|
ILPT
6942
Industrial Logistics Properties Trust
ILPT
$582M
| $24K | ﹤0.01% |
+5,809
| New | +$23.6K |
|
6943
Identive
INVE
$61M
| $24K | ﹤0.01% |
+3,044
| New | +$24.3K |
|
|
LADR
6944
PUT
Ladder Capital
LADR
$1.24B
| $24K | ﹤0.01% |
2,200
+1,600
| +267% | +$17.6K |
|
6945
PUT
Live Oak Bancshares
LOB
$1.98B
| $24K | ﹤0.01% |
+600
| New | +$23.9K |
|
6946
VanEck Mortgage REIT Income ETF
MORT
$367M
| $24K | ﹤0.01% |
+2,130
| New | +$24.1K |
|
6947
CALL
Nu Skin
NUS
$257M
| $24K | ﹤0.01% |
1,800
+700
| +64% | +$10.9K |
|
6948
Olema Pharmaceuticals
OLMA
$977M
| $24K | ﹤0.01% |
2,154
-16,497
| -88% | -$213K |
|
6949
PUT
Outdoor Holding Co
POWW
$249M
| $24K | ﹤0.01% |
8,800
+4,400
| +100% | +$10.3K |
|
6950
PROG Holdings
PRG
$1.71B
| $24K | ﹤0.01% |
+714
| New | +$22.5K |
|
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.