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 | |
|---|---|---|---|---|---|---|
5951
PUT
CVB Financial
CVBF
$3.94B
| $69K | ﹤0.01% |
+3,900
| New | +$69.2K |
|
5952
Enlivex Ltd
ENLV
$35.2M
| $69K | ﹤0.01% |
+1,217
| New | +$59.5K |
|
5953
PUT
Jack Henry & Associates
JKHY
$10.9B
| $69K | ﹤0.01% |
400
-3,700
| -90% | -$630K |
|
5954
Everspin Technologies
MRAM
$341M
| $69K | ﹤0.01% |
8,805
+8,070
| +1,098% | +$68.8K |
|
|
MRCC
5955
PUT
DELISTED
Monroe Capital Corp
MRCC
| $69K | ﹤0.01% |
+9,700
| New | +$70.3K |
|
5956
CALL
Manitowoc
MTW
$497M
| $69K | ﹤0.01% |
4,900
+3,000
| +158% | +$44.5K |
|
5957
CALL
National Health Investors
NHI
$3.72B
| $69K | ﹤0.01% |
+1,100
| New | +$62K |
|
5958
Resources Connection
RGP
$151M
| $69K | ﹤0.01% |
5,259
+3,351
| +176% | +$44.8K |
|
5959
Shattuck Labs
STTK
$675M
| $69K | ﹤0.01% |
+7,790
| New | +$71.3K |
|
|
TGI
5960
CALL
DELISTED
Triumph Group
TGI
| $69K | ﹤0.01% |
4,600
+3,500
| +318% | +$52.1K |
|
5961
PUT
American Resources Corp
AREC
$191M
| $68K | ﹤0.01% |
50,400
-26,700
| -35% | -$39.5K |
|
5962
CALL
A10 Networks
ATEN
$2.13B
| $68K | ﹤0.01% |
5,000
-14,400
| -74% | -$194K |
|
5963
PUT
Enanta Pharmaceuticals
ENTA
$366M
| $68K | ﹤0.01% |
3,900
+2,000
| +105% | +$26.5K |
|
5964
PUT
Grand Canyon Education
LOPE
$3.79B
| $68K | ﹤0.01% |
500
-2,900
| -85% | -$379K |
|
5965
CALL
MasterCraft Boat Holdings
MCFT
$579M
| $68K | ﹤0.01% |
2,900
+600
| +26% | +$12.9K |
|
5966
CALL
Nomura Holdings
NMR
$28.3B
| $68K | ﹤0.01% |
10,700
+9,600
| +873% | +$53.3K |
|
5967
Insperity
NSP
$1.93B
| $68K | ﹤0.01% |
+622
| New | +$66.1K |
|
5968
CALL
OraSure Technologies
OSUR
$279M
| $68K | ﹤0.01% |
11,200
+8,500
| +315% | +$61.7K |
|
5969
PUT
Q2 Holdings
QTWO
$3.8B
| $68K | ﹤0.01% |
1,300
-700
| -35% | -$31.6K |
|
5970
PUT
RLX Technology
RLX
$2.47B
| $68K | ﹤0.01% |
35,500
-113,800
| -76% | -$218K |
|
5971
CALL
Riskified
RSKD
$694M
| $68K | ﹤0.01% |
12,600
+12,100
| +2,420% | +$57.5K |
|
5972
Tredegar Corp
TG
$265M
| $68K | ﹤0.01% |
10,539
+6,105
| +138% | +$29.7K |
|
5973
CALL
Unitil
UTL
$970M
| $68K | ﹤0.01% |
1,300
+1,000
| +333% | +$50.4K |
|
5974
CALL
Valmont Industries
VMI
$9.3B
| $68K | ﹤0.01% |
+300
| New | +$67.1K |
|
|
PYCR
5975
PUT
DELISTED
Paycor HCM, Inc. Common Stock
PYCR
| $68K | ﹤0.01% |
3,500
+2,900
| +483% | +$58K |
|
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.