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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4051
PUT
BigBear.ai
BBAI
$1.32B
| $349K | ﹤0.01% |
231,400
+33,000
| +17% | +$51.6K |
|
4052
PUT
MillerKnoll
MLKN
$1.61B
| $349K | ﹤0.01% |
13,200
+6,100
| +86% | +$160K |
|
4053
CALL
Bankunited
BKU
$3.41B
| $348K | ﹤0.01% |
11,900
-600
| -5% | -$16.7K |
|
4054
PUT
Cheniere Energy
CQP
$31B
| $348K | ﹤0.01% |
7,100
+1,200
| +20% | +$58.2K |
|
4055
PUT
Flowers Foods
FLO
$1.6B
| $348K | ﹤0.01% |
15,700
+14,600
| +1,327% | +$346K |
|
4056
PUT
Klaviyo
KVYO
$5.65B
| $348K | ﹤0.01% |
14,000
-37,800
| -73% | -$884K |
|
|
CALY
4057
PUT
Callaway Golf Company
CALY
$3.28B
| $348K | ﹤0.01% |
22,800
+3,700
| +19% | +$57.8K |
|
|
FLNA
4058
Filana Therapeutics
FLNA
$42.7M
| $348K | ﹤0.01% |
28,235
+18,297
| +184% | +$386K |
|
4059
Sprott Junior Uranium Miners ETF
URNJ
$310M
| $348K | ﹤0.01% |
14,549
-407
| -3% | -$10.9K |
|
4060
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.37B
| $348K | ﹤0.01% |
4,643
+4,218
| +992% | +$313K |
|
4061
CALL
BJ's Restaurants
BJRI
$1.45B
| $347K | ﹤0.01% |
10,000
-500
| -5% | -$17.2K |
|
4062
CALL
CareDx
CDNA
$1.85B
| $347K | ﹤0.01% |
22,400
+19,500
| +672% | +$236K |
|
4063
Thomson Reuters
TRI
$45.1B
| $347K | ﹤0.01% |
2,027
-5,002
| -71% | -$829K |
|
4064
Bloomin' Brands
BLMN
$736M
| $345K | ﹤0.01% |
+17,963
| New | +$421K |
|
4065
CALL
Kodak
KODK
$812M
| $345K | ﹤0.01% |
64,300
-50,300
| -44% | -$255K |
|
|
NNDM
4066
Nano Dimension
NNDM
$314M
| $345K | ﹤0.01% |
156,863
-63,232
| -29% | -$159K |
|
4067
PUT
Zeta Global
ZETA
$5.46B
| $345K | ﹤0.01% |
19,600
-3,400
| -15% | -$49.9K |
|
4068
PUT
AMC Global Media
AMCX
$451M
| $344K | ﹤0.01% |
35,700
+800
| +2% | +$10.6K |
|
4069
PUT
Excelerate Energy
EE
$1.19B
| $344K | ﹤0.01% |
18,700
+13,900
| +290% | +$239K |
|
4070
Goodyear
GT
$2.12B
| $344K | ﹤0.01% |
30,368
-116,129
| -79% | -$1.42M |
|
4071
CALL
Icon
ICLR
$13.9B
| $344K | ﹤0.01% |
1,100
-100
| -8% | -$31.3K |
|
|
MFA
4072
PUT
MFA Financial
MFA
$935M
| $344K | ﹤0.01% |
32,400
+9,600
| +42% | +$103K |
|
4073
CALL
Phathom Pharmaceuticals
PHAT
$930M
| $344K | ﹤0.01% |
33,400
+2,000
| +6% | +$20.6K |
|
4074
PUT
Banco Santander
SAN
$200B
| $344K | ﹤0.01% |
74,500
| – | – |
|
4075
CALL
Crane NXT
CXT
$3.14B
| $343K | ﹤0.01% |
5,600
+800
| +17% | +$49K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.