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 | |
|---|---|---|---|---|---|---|
3126
PPG Industries
PPG
$27.2B
| $993K | ﹤0.01% |
6,856
-15,244
| -69% | -$2.17M |
|
3127
PUT
Credit Acceptance
CACC
$5.76B
| $992K | ﹤0.01% |
1,800
-1,000
| -36% | -$549K |
|
3128
PUT
Covenant Logistics
CVLG
$1.12B
| $992K | ﹤0.01% |
+42,800
| New | +$1.03M |
|
3129
GigaCloud Technology
GCT
$1.46B
| $992K | ﹤0.01% |
37,140
+10,473
| +39% | +$298K |
|
3130
AES
AES
$10.6B
| $991K | ﹤0.01% |
+55,291
| New | +$924K |
|
3131
CALL
CTS Corp
CTS
$1.8B
| $991K | ﹤0.01% |
+21,200
| New | +$930K |
|
3132
PUT
dLocal
DLO
$4.39B
| $990K | ﹤0.01% |
67,400
-60,600
| -47% | -$1.01M |
|
|
AKRO
3133
PUT
DELISTED
Akero Therapeutics
AKRO
| $987K | ﹤0.01% |
39,100
+29,700
| +316% | +$713K |
|
3134
CALL
Mine Safety
MSA
$6.86B
| $987K | ﹤0.01% |
5,100
+800
| +19% | +$141K |
|
3135
CALL
Chefs' Warehouse
CHEF
$3.96B
| $986K | ﹤0.01% |
26,200
+1,000
| +4% | +$34.2K |
|
|
PPLI
3136
PUT
People Inc
PPLI
$3.18B
| $986K | ﹤0.01% |
22,552
+3,536
| +19% | +$153K |
|
3137
PagerDuty
PD
$771M
| $985K | ﹤0.01% |
43,442
+15,992
| +58% | +$380K |
|
|
BERY
3138
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $985K | ﹤0.01% |
17,751
-1,960
| -10% | -$112K |
|
3139
CALL
Grocery Outlet
GO
$937M
| $984K | ﹤0.01% |
34,200
-23,700
| -41% | -$625K |
|
3140
Structure Therapeutics
GPCR
$3.41B
| $984K | ﹤0.01% |
22,965
+10,643
| +86% | +$449K |
|
3141
CALL
Insight Enterprises
NSIT
$3.74B
| $983K | ﹤0.01% |
5,300
-21,800
| -80% | -$4.03M |
|
3142
CALL
Reinsurance Group of America
RGA
$15.8B
| $983K | ﹤0.01% |
5,100
+2,300
| +82% | +$401K |
|
3143
CALL
Worthington Enterprises
WOR
$2.83B
| $983K | ﹤0.01% |
15,800
+13,600
| +618% | +$810K |
|
3144
PUT
Avery Dennison
AVY
$12.9B
| $982K | ﹤0.01% |
4,400
-3,600
| -45% | -$747K |
|
3145
CALL
United States Brent Oil Fund
BNO
$742M
| $979K | ﹤0.01% |
30,700
-74,600
| -71% | -$2.19M |
|
3146
PUT
Joby Aviation
JOBY
$6.99B
| $976K | ﹤0.01% |
182,100
+83,800
| +85% | +$475K |
|
3147
Eastman Chemical
EMN
$7.84B
| $975K | ﹤0.01% |
9,730
-722
| -7% | -$63.5K |
|
|
AGTI
3148
CALL
DELISTED
Agiliti Inc
AGTI
| $975K | ﹤0.01% |
96,400
+96,100
| +32,033% | +$805K |
|
3149
CALL
Agios Pharmaceuticals
AGIO
$2.2B
| $973K | ﹤0.01% |
33,300
+20,000
| +150% | +$536K |
|
3150
Ciena
CIEN
$48.1B
| $972K | ﹤0.01% |
+19,660
| New | +$1.04M |
|
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.