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 | |
|---|---|---|---|---|---|---|
476
PUT
Colgate-Palmolive
CL
$73.3B
| $28.2M | 0.02% |
290,600
+106,000
| +57% | +$9.78M |
|
477
CALL
CAVA Group
CAVA
$7.26B
| $28.1M | 0.02% |
303,400
+80,400
| +36% | +$6.21M |
|
478
CALL
Amphenol
APH
$194B
| $28.1M | 0.02% |
416,800
-78,000
| -16% | -$4.92M |
|
479
PUT
Capital One
COF
$124B
| $27.9M | 0.02% |
201,500
-30,700
| -13% | -$4.31M |
|
480
PUT
Take-Two Interactive
TTWO
$43.4B
| $27.9M | 0.02% |
179,400
+18,100
| +11% | +$2.75M |
|
481
PUT
Biogen
BIIB
$29.2B
| $27.8M | 0.02% |
120,100
+45,400
| +61% | +$9.87M |
|
482
PUT
BP
BP
$112B
| $27.8M | 0.02% |
770,400
+189,300
| +33% | +$7.09M |
|
483
CALL
Phillips 66
PSX
$84.8B
| $27.8M | 0.02% |
197,000
-38,800
| -16% | -$5.74M |
|
484
PUT
Nucor
NUE
$53.7B
| $27.8M | 0.02% |
175,600
+96,600
| +122% | +$16.8M |
|
485
PUT
Alcoa
AA
$12.2B
| $27.7M | 0.02% |
697,100
-718,600
| -51% | -$27.8M |
|
486
CALL
Okta
OKTA
$23.8B
| $27.7M | 0.02% |
295,700
-55,300
| -16% | -$5.24M |
|
487
CALL
Affirm
AFRM
$24.8B
| $27.5M | 0.02% |
911,300
-72,600
| -7% | -$2.33M |
|
488
CALL
Dollar General
DG
$26.5B
| $27.5M | 0.02% |
207,800
-141,800
| -41% | -$19.8M |
|
|
GAP
489
PUT
The Gap Inc
GAP
$7.07B
| $27.5M | 0.02% |
1,149,700
+106,600
| +10% | +$2.48M |
|
|
IPFF
490
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $27.4M | 0.02% |
508,600
+34,700
| +7% | +$1.87M |
|
491
CALL
Intuit
INTU
$77.8B
| $27.4M | 0.02% |
41,700
-41,700
| -50% | -$25.9M |
|
492
CALL
Nu Holdings
NU
$70.1B
| $27.3M | 0.02% |
2,117,200
-302,100
| -12% | -$3.52M |
|
493
PUT
Marriott International
MAR
$97.5B
| $27.3M | 0.02% |
158,300
+38,200
| +32% | +$9.17M |
|
494
CALL
Cameco
CCJ
$39.4B
| $27.2M | 0.02% |
553,000
-379,600
| -41% | -$19.2M |
|
495
Marathon Digital Holdings
MARA
$4.73B
| $27.1M | 0.02% |
1,364,416
-96,286
| -7% | -$1.83M |
|
496
CALL
Autodesk
ADSK
$43B
| $27.1M | 0.02% |
109,400
-17,200
| -14% | -$3.86M |
|
497
PUT
Cloudflare
NET
$95.5B
| $27.1M | 0.02% |
326,800
-600,400
| -65% | -$48.4M |
|
498
CALL
Kinder Morgan
KMI
$72.3B
| $27M | 0.02% |
1,360,800
+356,700
| +36% | +$6.8M |
|
499
CALL
Medtronic
MDT
$105B
| $27M | 0.02% |
342,900
-2,800
| -0.8% | -$230K |
|
|
500
PUT
Dollar General
DG
$26.5B
| $27M | 0.02% |
203,900
-143,300
| -41% | -$20M |
|
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.