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 | |
|---|---|---|---|---|---|---|
2826
CALL
Energy Fuels
UUUU
$2.82B
| $1.32M | ﹤0.01% |
210,100
+108,100
| +106% | +$728K |
|
2827
CALL
Republic Services
RSG
$66.7B
| $1.32M | ﹤0.01% |
6,900
-17,600
| -72% | -$3.12M |
|
2828
PUT
Willis Towers Watson
WTW
$27.9B
| $1.32M | ﹤0.01% |
4,800
-6,400
| -57% | -$1.68M |
|
2829
PUT
Klaviyo
KVYO
$4.91B
| $1.32M | ﹤0.01% |
51,800
+22,300
| +76% | +$596K |
|
2830
PUT
Sturm, Ruger & Co
RGR
$610M
| $1.32M | ﹤0.01% |
28,600
+3,400
| +13% | +$150K |
|
|
FUSN
2831
PUT
DELISTED
Fusion Pharmaceuticals Inc. Common Shares
FUSN
| $1.32M | ﹤0.01% |
61,800
+54,000
| +692% | +$646K |
|
2832
FTAI Aviation
FTAI
$22.2B
| $1.31M | ﹤0.01% |
+19,501
| New | +$1.07M |
|
2833
CALL
Pembina Pipeline
PBA
$29.9B
| $1.31M | ﹤0.01% |
37,100
+18,900
| +104% | +$652K |
|
2834
CALL
Powell Industries
POWL
$8.46B
| $1.31M | ﹤0.01% |
27,600
+21,900
| +384% | +$937K |
|
2835
CALL
Eversource Energy
ES
$28.2B
| $1.31M | ﹤0.01% |
21,900
+2,500
| +13% | +$144K |
|
2836
Palo Alto Networks
PANW
$264B
| $1.3M | ﹤0.01% |
+9,192
| New | +$1.45M |
|
2837
Uber
UBER
$134B
| $1.3M | ﹤0.01% |
+16,951
| New | +$1.22M |
|
2838
PUT
Bloomin' Brands
BLMN
$680M
| $1.3M | ﹤0.01% |
45,500
-118,100
| -72% | -$3.21M |
|
2839
HSBC
HSBC
$355B
| $1.3M | ﹤0.01% |
+33,154
| New | +$1.29M |
|
2840
PUT
Plains All American Pipeline
PAA
$17.4B
| $1.3M | ﹤0.01% |
74,300
+11,800
| +19% | +$190K |
|
2841
WisdomTree Japan Hedged Equity Fund
DXJ
$7.21B
| $1.3M | ﹤0.01% |
+12,008
| New | +$1.2M |
|
2842
Urban Outfitters
URBN
$5.99B
| $1.3M | ﹤0.01% |
+29,991
| New | +$1.23M |
|
2843
PUT
Getty Images
GETY
$184M
| $1.3M | ﹤0.01% |
313,400
-3,000
| -0.9% | -$13.9K |
|
2844
Semtech
SMTC
$11.7B
| $1.3M | ﹤0.01% |
47,278
+41,742
| +754% | +$892K |
|
2845
PUT
East-West Bancorp
EWBC
$17.9B
| $1.3M | ﹤0.01% |
16,400
-19,600
| -54% | -$1.44M |
|
2846
Xcel Energy
XEL
$51B
| $1.3M | ﹤0.01% |
24,138
+11,578
| +92% | +$661K |
|
|
ACH
2847
CALL
Accendra Health
ACH
$240M
| $1.3M | ﹤0.01% |
46,800
+40,200
| +609% | +$893K |
|
2848
CALL
Zebra Technologies
ZBRA
$12.4B
| $1.3M | ﹤0.01% |
4,300
-2,700
| -39% | -$723K |
|
|
CTLT
2849
DELISTED
CATALENT, INC.
CTLT
| $1.3M | ﹤0.01% |
22,963
+10,594
| +86% | +$574K |
|
2850
PUT
Integer Holdings
ITGR
$3.35B
| $1.29M | ﹤0.01% |
11,100
+8,000
| +258% | +$850K |
|
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.