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 | |
|---|---|---|---|---|---|---|
|
GPGI
4451
GPGI Inc
GPGI
$3.87B
| $245K | ﹤0.01% |
+43,502
| New | +$240K |
|
4452
CALL
First Advantage
FA
$3.69B
| $245K | ﹤0.01% |
15,300
+600
| +4% | +$9.66K |
|
4453
PUT
Middleby
MIDD
$6.01B
| $245K | ﹤0.01% |
2,000
-1,200
| -38% | -$163K |
|
4454
CALL
Prothena Corp
PRTA
$448M
| $245K | ﹤0.01% |
11,900
| – | – |
|
4455
CALL
Pacer Trendpilot US Large Cap ETF
PTLC
$3.19B
| $245K | ﹤0.01% |
5,100
-3,900
| -43% | -$186K |
|
4456
CALL
Triumph Financial Inc
TFIN
$1.81B
| $245K | ﹤0.01% |
3,000
-3,800
| -56% | -$283K |
|
4457
CALL
Tecnoglass
TGLS
$1.99B
| $245K | ﹤0.01% |
4,900
-16,100
| -77% | -$840K |
|
|
TEM
4458
CALL
Tempus AI
TEM
$7.48B
| $245K | ﹤0.01% |
+7,000
| New | +$215K |
|
|
VISN
4459
CALL
Vistance Networks Inc
VISN
$2.61B
| $244K | ﹤0.01% |
198,800
+43,900
| +28% | +$52.2K |
|
4460
CALL
Essex Property Trust
ESS
$19.1B
| $244K | ﹤0.01% |
900
+800
| +800% | +$205K |
|
|
4461
PUT
Essex Property Trust
ESS
$19.1B
| $244K | ﹤0.01% |
900
-18,100
| -95% | -$4.65M |
|
4462
CALL
Pinnacle West Capital
PNW
$12.4B
| $244K | ﹤0.01% |
3,200
-18,800
| -85% | -$1.42M |
|
4463
PUT
The RealReal
REAL
$1.41B
| $244K | ﹤0.01% |
76,700
+40,800
| +114% | +$151K |
|
4464
State Street Utilities Select Sector SPDR ETF
XLU
$23.1B
| $244K | ﹤0.01% |
+7,180
| New | +$247K |
|
4465
CALL
ProFrac Holding
ACDC
$653M
| $243K | ﹤0.01% |
32,800
+32,400
| +8,100% | +$269K |
|
4466
Chegg
CHGG
$116M
| $243K | ﹤0.01% |
76,927
+67,798
| +743% | +$337K |
|
4467
PUT
Mine Safety
MSA
$6.79B
| $243K | ﹤0.01% |
1,300
-100
| -7% | -$18.6K |
|
4468
CALL
Unusual Whales Subversive Democratic Trading ETF
NANC
$268M
| $243K | ﹤0.01% |
+6,700
| New | +$231K |
|
4469
CALL
Quad
QUAD
$479M
| $243K | ﹤0.01% |
44,700
-1,700
| -4% | -$8.35K |
|
4470
CALL
Horizon Technology Finance
HRZN
$294M
| $242K | ﹤0.01% |
20,100
+12,200
| +154% | +$142K |
|
4471
Owens Corning
OC
$11B
| $242K | ﹤0.01% |
1,397
-2,585
| -65% | -$448K |
|
4472
Treace Medical Concepts
TMCI
$262M
| $242K | ﹤0.01% |
36,480
-7,467
| -17% | -$60.3K |
|
4473
CALL
World Kinect Corp
WKC
$2.07B
| $242K | ﹤0.01% |
9,400
-1,200
| -11% | -$30.4K |
|
4474
PUT
Ziff Davis
ZD
$2B
| $242K | ﹤0.01% |
4,400
+4,000
| +1,000% | +$220K |
|
4475
PUT
Bit Digital
BTBT
$428M
| $241K | ﹤0.01% |
75,900
+44,900
| +145% | +$110K |
|
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.