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 | |
|---|---|---|---|---|---|---|
2026
Williams-Sonoma
WSM
$26.7B
| $3.02M | ﹤0.01% |
+19,014
| New | +$2.21M |
|
2027
CALL
Allegion
ALLE
$13B
| $3.02M | ﹤0.01% |
22,400
-1,900
| -8% | -$243K |
|
2028
Under Armour
UAA
$3B
| $3.02M | ﹤0.01% |
408,654
+243,659
| +148% | +$1.94M |
|
|
NVEI
2029
DELISTED
Nuvei Corporation Subordinate Voting Shares
NVEI
| $3.02M | ﹤0.01% |
95,367
+81,108
| +569% | +$2.05M |
|
2030
PUT
Invesco
IVZ
$13.3B
| $3.01M | ﹤0.01% |
181,400
+166,400
| +1,109% | +$2.69M |
|
2031
CALL
Lithia Motors
LAD
$7.78B
| $3.01M | ﹤0.01% |
10,000
+3,000
| +43% | +$887K |
|
2032
CALL
Weatherford International
WFRD
$6.36B
| $3M | ﹤0.01% |
26,000
-10,700
| -29% | -$1.09M |
|
2033
CALL
Helen of Troy
HELE
$663M
| $3M | ﹤0.01% |
26,000
-27,900
| -52% | -$3.33M |
|
|
NOVA
2034
PUT
DELISTED
Sunnova Energy
NOVA
| $3M | ﹤0.01% |
488,800
-185,600
| -28% | -$1.67M |
|
2035
CALL
Penske Automotive Group
PAG
$14.3B
| $3M | ﹤0.01% |
18,500
+12,200
| +194% | +$1.86M |
|
2036
PUT
Pinnacle West Capital
PNW
$12.9B
| $3M | ﹤0.01% |
40,100
-27,700
| -41% | -$1.95M |
|
2037
CALL
Eagle Materials
EXP
$6.6B
| $2.99M | ﹤0.01% |
11,000
+5,500
| +100% | +$1.3M |
|
2038
CALL
Geron
GERN
$911M
| $2.97M | ﹤0.01% |
901,500
+552,900
| +159% | +$1.24M |
|
2039
CALL
Procore
PCOR
$6.46B
| $2.97M | ﹤0.01% |
36,200
-33,800
| -48% | -$2.51M |
|
2040
XPeng
XPEV
$11.8B
| $2.97M | ﹤0.01% |
+387,276
| New | +$3.75M |
|
|
CBL
2041
CALL
DELISTED
CBL& Associates Properties, Inc.
CBL
| $2.97M | ﹤0.01% |
129,700
+13,700
| +12% | +$314K |
|
2042
CALL
Garrett Motion
GTX
$5.9B
| $2.97M | ﹤0.01% |
298,400
+295,900
| +11,836% | +$2.72M |
|
2043
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $2.96M | ﹤0.01% |
160,200
+128,600
| +407% | +$3.19M |
|
2044
CALL
Plains All American Pipeline
PAA
$17.4B
| $2.96M | ﹤0.01% |
168,700
-21,100
| -11% | -$341K |
|
2045
PUT
Franklin Resources
BEN
$16.9B
| $2.96M | ﹤0.01% |
105,300
+26,200
| +33% | +$722K |
|
|
CNR
2046
CALL
Core Natural Resources Inc
CNR
$4.19B
| $2.95M | ﹤0.01% |
35,200
-26,300
| -43% | -$2.35M |
|
|
EH
2047
CALL
EHang Holdings
EH
$372M
| $2.95M | ﹤0.01% |
143,300
+80,600
| +129% | +$1.04M |
|
2048
PUT
Cognex
CGNX
$10.3B
| $2.94M | ﹤0.01% |
69,400
+700
| +1% | +$27.3K |
|
2049
PUT
TAL Education Group
TAL
$5.71B
| $2.93M | ﹤0.01% |
258,300
-25,600
| -9% | -$319K |
|
2050
PUT
Nabors Industries
NBR
$1.23B
| $2.93M | ﹤0.01% |
34,000
+2,900
| +9% | +$237K |
|
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.