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 | |
|---|---|---|---|---|---|---|
651
PUT
Mobileye
MBLY
$7.39B
| $18.6M | 0.01% |
662,700
+219,400
| +49% | +$6.35M |
|
652
CALL
Arbor Realty Trust
ABR
$970M
| $18.6M | 0.01% |
1,293,300
-169,300
| -12% | -$2.26M |
|
|
PARA
653
CALL
DELISTED
Paramount Global Class B
PARA
| $18.5M | 0.01% |
1,781,500
+757,300
| +74% | +$8.87M |
|
654
PUT
Tyson Foods
TSN
$20.1B
| $18.5M | 0.01% |
324,200
-102,600
| -24% | -$6M |
|
655
CALL
Iron Mountain
IRM
$37B
| $18.5M | 0.01% |
206,100
+116,400
| +130% | +$9.42M |
|
656
PUT
MSCI
MSCI
$41.5B
| $18.5M | 0.01% |
38,300
+36,000
| +1,565% | +$17.9M |
|
657
PUT
NIO
NIO
$11.7B
| $18.4M | 0.01% |
4,434,900
-537,500
| -11% | -$2.54M |
|
658
PUT
Crocs
CROX
$6.77B
| $18.4M | 0.01% |
126,400
-172,400
| -58% | -$24.2M |
|
659
CALL
CRH
CRH
$66.9B
| $18.3M | 0.01% |
244,400
-12,600
| -5% | -$1.01M |
|
660
CALL
Cencora
COR
$58.5B
| $18.3M | 0.01% |
81,300
-9,600
| -11% | -$2.22M |
|
661
CALL
Rio Tinto
RIO
$150B
| $18.3M | 0.01% |
276,900
-5,600
| -2% | -$381K |
|
662
PUT
AGNC Investment
AGNC
$12.5B
| $18.2M | 0.01% |
1,912,900
+1,695,600
| +780% | +$16.2M |
|
663
CALL
AMC Entertainment Holdings
AMC
$2.01B
| $18.2M | 0.01% |
3,663,500
-185,200
| -5% | -$744K |
|
664
PUT
Iris Energy
IREN
$14.8B
| $18.2M | 0.01% |
1,616,000
+966,200
| +149% | +$7.24M |
|
665
PUT
CF Industries
CF
$19.6B
| $18.2M | 0.01% |
245,000
-11,900
| -5% | -$924K |
|
666
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $18.2M | 0.01% |
114,900
-69,300
| -38% | -$8.9M |
|
667
PUT
VF Corp
VFC
$6.74B
| $18.1M | 0.01% |
1,344,200
+509,400
| +61% | +$6.68M |
|
668
CALL
Norwegian Cruise Line
NCLH
$8.87B
| $18.1M | 0.01% |
965,300
+214,400
| +29% | +$3.76M |
|
669
PUT
Carrier Global
CARR
$56.6B
| $18.1M | 0.01% |
286,300
+101,200
| +55% | +$6.21M |
|
670
CALL
UBS Group
UBS
$173B
| $18M | 0.01% |
610,300
-151,500
| -20% | -$4.5M |
|
|
P
671
CALL
Everpure Inc
P
$24.8B
| $18M | 0.01% |
280,100
-248,200
| -47% | -$14.4M |
|
672
PUT
CAVA Group
CAVA
$7.26B
| $17.9M | 0.01% |
193,000
-5,600
| -3% | -$432K |
|
673
PUT
Li Auto
LI
$12B
| $17.8M | 0.01% |
996,200
-377,600
| -27% | -$9.11M |
|
|
SPR
674
CALL
DELISTED
Spirit AeroSystems
SPR
| $17.8M | 0.01% |
541,600
+258,300
| +91% | +$8.25M |
|
675
CALL
Yum! Brands
YUM
$40.7B
| $17.8M | 0.01% |
134,400
+28,800
| +27% | +$3.96M |
|
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.