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 | |
|---|---|---|---|---|---|---|
3451
CALL
FormFactor
FORM
$7.7B
| $605K | ﹤0.01% |
10,000
+300
| +3% | +$15.6K |
|
3452
CALL
Qfin Holdings
QFIN
$1.65B
| $605K | ﹤0.01% |
30,700
+2,900
| +10% | +$56.9K |
|
3453
CALL
Antero Midstream
AM
$10.4B
| $604K | ﹤0.01% |
41,000
+4,800
| +13% | +$68.9K |
|
|
GOGL
3454
PUT
DELISTED
Golden Ocean Group
GOGL
| $604K | ﹤0.01% |
43,800
-116,300
| -73% | -$1.61M |
|
3455
Fiverr
FVRR
$398M
| $601K | ﹤0.01% |
25,660
-32,744
| -56% | -$735K |
|
3456
CALL
Illumina
ILMN
$28.7B
| $601K | ﹤0.01% |
81,900
-7,228
| -8% | -$811K |
|
3457
CALL
Arrowhead Research
ARWR
$12B
| $600K | ﹤0.01% |
23,100
-8,600
| -27% | -$211K |
|
3458
CALL
Churchill Downs
CHDN
$6.15B
| $600K | ﹤0.01% |
4,300
+2,500
| +139% | +$328K |
|
3459
Grand Canyon Education
LOPE
$3.84B
| $600K | ﹤0.01% |
+4,293
| New | +$592K |
|
3460
PUT
LGI Homes
LGIH
$1.4B
| $599K | ﹤0.01% |
6,700
-6,100
| -48% | -$589K |
|
3461
CALL
Spire Global
SPIR
$432M
| $599K | ﹤0.01% |
55,300
+25,600
| +86% | +$265K |
|
3462
CALL
CGI
GIB
$14.5B
| $598K | ﹤0.01% |
6,000
+3,800
| +173% | +$391K |
|
3463
Target Hospitality
TH
$1.6B
| $598K | ﹤0.01% |
68,722
+8,421
| +14% | +$87.9K |
|
3464
CALL
Companhia Siderúrgica Nacional
SID
$1.49B
| $597K | ﹤0.01% |
260,000
+241,500
| +1,305% | +$636K |
|
|
SUPV
3465
CALL
Grupo Supervielle
SUPV
$857M
| $597K | ﹤0.01% |
88,100
+65,900
| +297% | +$429K |
|
3466
CALL
Beazer Homes USA
BZH
$903M
| $596K | ﹤0.01% |
21,700
+4,100
| +23% | +$116K |
|
3467
PUT
indie Semiconductor
INDI
$727M
| $596K | ﹤0.01% |
96,700
-2,400
| -2% | -$15.3K |
|
3468
PUT
Kratos Defense & Security Solutions
KTOS
$9.27B
| $596K | ﹤0.01% |
29,800
+15,700
| +111% | +$307K |
|
3469
CALL
Playtika
PLTK
$1.48B
| $596K | ﹤0.01% |
75,800
+72,200
| +2,006% | +$573K |
|
|
TRTX
3470
PUT
TPG RE Finance Trust
TRTX
$662M
| $596K | ﹤0.01% |
69,000
+66,300
| +2,456% | +$544K |
|
3471
CALL
Ultragenyx Pharmaceutical
RARE
$2.65B
| $595K | ﹤0.01% |
14,500
-12,900
| -47% | -$551K |
|
3472
CALL
Bloomin' Brands
BLMN
$731M
| $594K | ﹤0.01% |
30,900
-24,400
| -44% | -$572K |
|
|
STR
3473
CALL
DELISTED
Sitio Royalties
STR
| $594K | ﹤0.01% |
25,200
+10,800
| +75% | +$254K |
|
3474
Charter Communications
CHTR
$15.7B
| $592K | ﹤0.01% |
1,983
-14,564
| -88% | -$3.97M |
|
3475
PUT
Frontline
FRO
$8.59B
| $592K | ﹤0.01% |
23,000
-38,200
| -62% | -$973K |
|
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.