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 | |
|---|---|---|---|---|---|---|
401
CALL
Gilead Sciences
GILD
$162B
| $35.8M | 0.02% |
521,500
+71,300
| +16% | +$4.76M |
|
402
CALL
Marathon Digital Holdings
MARA
$4.73B
| $35.7M | 0.02% |
1,800,500
-502,400
| -22% | -$9.54M |
|
403
CALL
Microchip Technology
MCHP
$46.2B
| $35.4M | 0.02% |
387,100
+188,600
| +95% | +$17.3M |
|
404
CALL
RH
RH
$3.31B
| $35.4M | 0.02% |
144,900
-44,200
| -23% | -$11.6M |
|
405
CALL
Kraft Heinz
KHC
$30.8B
| $35.2M | 0.02% |
1,094,000
+37,700
| +4% | +$1.34M |
|
406
PUT
Shell
SHEL
$243B
| $34.9M | 0.02% |
484,200
+65,400
| +16% | +$4.67M |
|
407
Super Micro Computer
SMCI
$19.8B
| $34.9M | 0.02% |
+426,320
| New | +$36.4M |
|
408
PUT
Danaher
DHR
$127B
| $34.9M | 0.02% |
150,700
-104,300
| -41% | -$26.4M |
|
409
Starbucks
SBUX
$119B
| $34.7M | 0.02% |
446,246
+58,222
| +15% | +$4.74M |
|
410
Qualcomm
QCOM
$185B
| $34.7M | 0.02% |
+173,989
| New | +$32.9M |
|
411
PUT
Seagate
STX
$205B
| $34.6M | 0.02% |
335,300
+91,400
| +37% | +$8.54M |
|
412
CALL
SoFi Technologies
SOFI
$21.9B
| $34.5M | 0.02% |
5,223,300
+968,500
| +23% | +$6.83M |
|
413
Newmont
NEM
$102B
| $34.5M | 0.02% |
824,151
-29,657
| -3% | -$1.21M |
|
414
CALL
Akamai
AKAM
$18.1B
| $34.4M | 0.02% |
381,700
+201,900
| +112% | +$19.5M |
|
415
CALL
eBay
EBAY
$49.3B
| $34.4M | 0.02% |
639,800
+88,500
| +16% | +$4.61M |
|
416
CALL
Applovin
APP
$139B
| $34.3M | 0.02% |
412,100
-79,000
| -16% | -$6.13M |
|
417
PUT
Marathon Petroleum
MPC
$92.2B
| $34.1M | 0.02% |
196,800
+27,300
| +16% | +$5.08M |
|
418
CALL
Vanguard Consumer Discretionary ETF
VCR
$6.07B
| $34.1M | 0.02% |
62,500
+37,100
| +146% | +$11.4M |
|
419
CALL
Lennar Class A
LEN
$19.8B
| $33.9M | 0.02% |
233,975
-242,135
| -51% | -$36.8M |
|
420
PUT
TJX Companies
TJX
$172B
| $33.8M | 0.02% |
307,400
+33,500
| +12% | +$3.37M |
|
421
CALL
Trade Desk
TTD
$8.26B
| $33.8M | 0.02% |
345,800
-236,000
| -41% | -$21.3M |
|
422
PUT
Lamb Weston
LW
$6.63B
| $33.8M | 0.02% |
401,600
+142,000
| +55% | +$12.1M |
|
423
PUT
C3.ai
AI
$1.27B
| $33.7M | 0.02% |
1,164,000
-424,400
| -27% | -$10.9M |
|
424
PUT
Albemarle
ALB
$13.9B
| $33.6M | 0.02% |
351,700
-147,700
| -30% | -$17.6M |
|
425
PUT
NRG Energy
NRG
$29.5B
| $33.5M | 0.02% |
429,900
+26,100
| +6% | +$2.02M |
|
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.