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 | |
|---|---|---|---|---|---|---|
3876
CALL
Varonis Systems
VRNS
$5.13B
| $402K | ﹤0.01% |
8,400
-38,500
| -82% | -$1.7M |
|
|
DESP
3877
DELISTED
Despegar.com
DESP
| $401K | ﹤0.01% |
30,324
+29,033
| +2,249% | +$382K |
|
3878
PUT
Dorchester Minerals
DMLP
$1.3B
| $401K | ﹤0.01% |
13,000
+11,300
| +665% | +$368K |
|
3879
Element Solutions
ESI
$8.89B
| $401K | ﹤0.01% |
+14,808
| New | +$365K |
|
3880
PUT
JELD-WEN Holding
JELD
$98.2M
| $401K | ﹤0.01% |
29,800
+27,900
| +1,468% | +$466K |
|
3881
CALL
National Fuel Gas
NFG
$7.73B
| $401K | ﹤0.01% |
7,400
-2,100
| -22% | -$115K |
|
3882
CALL
Zebra Technologies
ZBRA
$13.5B
| $401K | ﹤0.01% |
1,300
-3,000
| -70% | -$912K |
|
3883
CALL
BGC Group
BGC
$5.73B
| $400K | ﹤0.01% |
48,200
+34,500
| +252% | +$284K |
|
3884
PUT
C4 Therapeutics
CCCC
$393M
| $400K | ﹤0.01% |
86,600
+11,000
| +15% | +$65.6K |
|
3885
PUT
Extreme Networks
EXTR
$3.92B
| $400K | ﹤0.01% |
29,800
-38,700
| -56% | -$445K |
|
3886
PUT
Fortuna Silver Mines
FSM
$2.55B
| $400K | ﹤0.01% |
81,800
+13,700
| +20% | +$69.1K |
|
3887
Lumentum
LITE
$50.7B
| $400K | ﹤0.01% |
7,865
-16,804
| -68% | -$761K |
|
|
ARI
3888
CALL
Apollo Commercial Real Estate
ARI
$881M
| $399K | ﹤0.01% |
40,800
-1,800
| -4% | -$18.6K |
|
3889
CALL
Fox Factory Holding Corp
FOXF
$801M
| $399K | ﹤0.01% |
8,300
-8,300
| -50% | -$375K |
|
3890
PUT
PTC
PTC
$14.7B
| $399K | ﹤0.01% |
2,200
-4,200
| -66% | -$752K |
|
3891
CALL
Tucows
TCX
$101M
| $399K | ﹤0.01% |
20,700
+18,900
| +1,050% | +$363K |
|
|
MRSN
3892
CALL
DELISTED
Mersana Therapeutics
MRSN
| $398K | ﹤0.01% |
7,936
+7,712
| +3,443% | +$558K |
|
3893
EVgo
EVGO
$230M
| $397K | ﹤0.01% |
162,286
+80,729
| +99% | +$165K |
|
3894
Mama's Creations
MAMA
$830M
| $397K | ﹤0.01% |
58,954
+47,468
| +413% | +$289K |
|
3895
Ramaco Resources Class A
METC
$637M
| $397K | ﹤0.01% |
32,977
+30,682
| +1,337% | +$427K |
|
|
SEMR
3896
CALL
DELISTED
Semrush
SEMR
| $397K | ﹤0.01% |
29,700
+29,100
| +4,850% | +$403K |
|
|
SPTN
3897
CALL
DELISTED
SpartanNash
SPTN
| $397K | ﹤0.01% |
21,200
+11,100
| +110% | +$216K |
|
|
OLK
3898
PUT
DELISTED
Olink Holding AB (publ) American Depositary Shares
OLK
| $397K | ﹤0.01% |
15,600
-400
| -3% | -$9.52K |
|
3899
CALL
Agree Realty
ADC
$9.74B
| $396K | ﹤0.01% |
6,400
-8,000
| -56% | -$473K |
|
3900
CALL
Frontier Group Holdings
ULCC
$1.43B
| $396K | ﹤0.01% |
80,400
+41,300
| +106% | +$248K |
|
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.