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 | |
|---|---|---|---|---|---|---|
|
PRFT
4001
CALL
DELISTED
Perficient Inc
PRFT
| $366K | ﹤0.01% |
4,900
+3,200
| +188% | +$204K |
|
4002
CALL
3D Systems Corp
DDD
$412M
| $365K | ﹤0.01% |
119,000
+66,400
| +126% | +$244K |
|
4003
CALL
Extreme Networks
EXTR
$3.92B
| $365K | ﹤0.01% |
27,200
+800
| +3% | +$9.19K |
|
4004
Hippo Holdings
HIPO
$789M
| $365K | ﹤0.01% |
21,279
-18,617
| -47% | -$353K |
|
|
MASI
4005
CALL
DELISTED
Masimo
MASI
| $365K | ﹤0.01% |
2,900
-400
| -12% | -$52.7K |
|
4006
PUT
Ultragenyx Pharmaceutical
RARE
$2.56B
| $365K | ﹤0.01% |
8,900
+4,400
| +98% | +$188K |
|
|
PPLI
4007
People Inc
PPLI
$3.13B
| $364K | ﹤0.01% |
9,492
+1,313
| +16% | +$54.3K |
|
4008
PUT
Invesco Mortgage Capital
IVR
$769M
| $364K | ﹤0.01% |
38,900
-2,200
| -5% | -$19.9K |
|
4009
PUT
OppFi
OPFI
$824M
| $364K | ﹤0.01% |
107,600
+35,700
| +50% | +$109K |
|
4010
PUT
Plains GP Holdings
PAGP
$5.2B
| $363K | ﹤0.01% |
19,300
-66,900
| -78% | -$1.23M |
|
4011
CALL
Ring Energy
REI
$287M
| $363K | ﹤0.01% |
215,000
+123,400
| +135% | +$227K |
|
4012
PUT
United States Copper Index Fund
CPER
$742M
| $361K | ﹤0.01% |
13,300
+9,300
| +233% | +$261K |
|
4013
iShares Core MSCI EAFE ETF
IEFA
$187B
| $361K | ﹤0.01% |
+4,970
| New | +$366K |
|
4014
CALL
W.R. Berkley
WRB
$28.3B
| $361K | ﹤0.01% |
6,900
-5,850
| -46% | -$313K |
|
4015
Comfort Systems
FIX
$57.2B
| $360K | ﹤0.01% |
1,187
-50
| -4% | -$15.9K |
|
4016
Centrus Energy
LEU
$3.34B
| $360K | ﹤0.01% |
8,427
+7,488
| +797% | +$331K |
|
4017
Barclays
BCS
$91B
| $359K | ﹤0.01% |
33,589
-142,870
| -81% | -$1.49M |
|
4018
CALL
BrightView Holdings
BV
$1.3B
| $359K | ﹤0.01% |
27,000
+10,700
| +66% | +$136K |
|
4019
PUT
Gartner
IT
$10.4B
| $359K | ﹤0.01% |
800
-900
| -53% | -$400K |
|
4020
PUT
MediaAlpha
MAX
$746M
| $359K | ﹤0.01% |
27,300
+25,800
| +1,720% | +$475K |
|
4021
PUT
Manulife Financial
MFC
$74.2B
| $359K | ﹤0.01% |
13,500
-8,600
| -39% | -$215K |
|
4022
CALL
10x Genomics
TXG
$5.97B
| $359K | ﹤0.01% |
18,500
-4,400
| -19% | -$115K |
|
|
CVGW
4023
PUT
DELISTED
Calavo Growers
CVGW
| $358K | ﹤0.01% |
15,800
+11,900
| +305% | +$312K |
|
4024
PUT
East-West Bancorp
EWBC
$18B
| $358K | ﹤0.01% |
4,900
-11,500
| -70% | -$853K |
|
|
PPTA
4025
CALL
Perpetua Resources
PPTA
$2.18B
| $358K | ﹤0.01% |
68,900
+67,100
| +3,728% | +$399K |
|
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.