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 | |
|---|---|---|---|---|---|---|
2076
CALL
Legacy Housing
LEGH
$630M
| $2.84M | ﹤0.01% |
132,100
+132,000
| +132,000% | +$3.17M |
|
2077
Liberty Broadband Class C
LBRDK
$4.15B
| $2.84M | ﹤0.01% |
49,651
+48,123
| +3,149% | +$3.18M |
|
2078
GitLab
GTLB
$5.28B
| $2.84M | ﹤0.01% |
48,661
+21,308
| +78% | +$1.4M |
|
2079
CALL
Alexandria Real Estate Equities
ARE
$8.88B
| $2.84M | ﹤0.01% |
22,000
-15,700
| -42% | -$1.93M |
|
2080
CALL
A.O. Smith
AOS
$8.38B
| $2.83M | ﹤0.01% |
31,700
+31,000
| +4,429% | +$2.56M |
|
2081
Symbotic
SYM
$5.11B
| $2.83M | ﹤0.01% |
+62,960
| New | +$2.76M |
|
2082
PUT
Acadia Pharmaceuticals
ACAD
$4.25B
| $2.83M | ﹤0.01% |
153,200
+33,600
| +28% | +$832K |
|
2083
PUT
Welltower
WELL
$178B
| $2.83M | ﹤0.01% |
30,300
-5,500
| -15% | -$498K |
|
2084
CALL
ITT
ITT
$17.5B
| $2.83M | ﹤0.01% |
20,800
+14,100
| +210% | +$1.75M |
|
|
SA
2085
CALL
Seabridge Gold
SA
$2.8B
| $2.83M | ﹤0.01% |
187,000
+100,300
| +116% | +$1.17M |
|
2086
CALL
Bausch Health
BHC
$1.65B
| $2.82M | ﹤0.01% |
265,600
-234,100
| -47% | -$2.05M |
|
2087
PUT
Perrigo
PRGO
$1.4B
| $2.81M | ﹤0.01% |
87,300
-21,700
| -20% | -$684K |
|
2088
St. Joe Company
JOE
$3.57B
| $2.79M | ﹤0.01% |
48,144
+29,285
| +155% | +$1.62M |
|
2089
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $2.79M | ﹤0.01% |
82,600
-187,600
| -69% | -$14.6M |
|
2090
PUT
American Eagle Outfitters
AEO
$2.85B
| $2.79M | ﹤0.01% |
108,100
-119,600
| -53% | -$2.66M |
|
2091
CALL
Structure Therapeutics
GPCR
$3.49B
| $2.79M | ﹤0.01% |
65,000
+54,100
| +496% | +$2.28M |
|
2092
PUT
Simplify US Equity PLUS Convexity ETF
SPYC
$109M
| $2.78M | ﹤0.01% |
123,500
+114,700
| +1,303% | +$3.75M |
|
2093
CME Group
CME
$92.2B
| $2.78M | ﹤0.01% |
12,915
-20,882
| -62% | -$4.39M |
|
2094
CALL
Hubbell
HUBB
$25.7B
| $2.78M | ﹤0.01% |
6,700
+5,800
| +644% | +$2.1M |
|
|
AL
2095
CALL
DELISTED
Air Lease Corp
AL
| $2.78M | ﹤0.01% |
54,000
+20,900
| +63% | +$894K |
|
2096
PUT
Alamos Gold
AGI
$12.4B
| $2.77M | ﹤0.01% |
187,700
+154,700
| +469% | +$1.95M |
|
2097
PUT
Penumbra
PEN
$12.5B
| $2.77M | ﹤0.01% |
12,400
-18,100
| -59% | -$4.47M |
|
2098
CALL
CVR Partners
UAN
$1.3B
| $2.77M | ﹤0.01% |
35,200
-10,300
| -23% | -$720K |
|
2099
PUT
Disc Medicine
IRON
$2.83B
| $2.76M | ﹤0.01% |
44,400
+43,900
| +8,780% | +$2.85M |
|
2100
PUT
Martin Marietta Materials
MLM
$33.6B
| $2.76M | ﹤0.01% |
4,500
+1,600
| +55% | +$873K |
|
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.