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 | |
|---|---|---|---|---|---|---|
1526
PUT
TripAdvisor
TRIP
$1.59B
| $4.39M | ﹤0.01% |
246,400
-188,800
| -43% | -$4.09M |
|
1527
Avis
CAR
$5.63B
| $4.39M | ﹤0.01% |
41,967
+8,408
| +25% | +$943K |
|
1528
PUT
Toronto Dominion Bank
TD
$198B
| $4.37M | ﹤0.01% |
79,600
+7,400
| +10% | +$419K |
|
|
FLG
1529
Flagstar Bank National Association
FLG
$5.77B
| $4.37M | ﹤0.01% |
452,418
+174,344
| +63% | +$1.69M |
|
1530
PUT
Yum! Brands
YUM
$41B
| $4.36M | ﹤0.01% |
32,900
-60,800
| -65% | -$8.37M |
|
|
GES
1531
CALL
DELISTED
Guess Inc
GES
| $4.34M | ﹤0.01% |
212,900
+58,700
| +38% | +$1.48M |
|
1532
American Tower
AMT
$77.7B
| $4.34M | ﹤0.01% |
22,325
-55,303
| -71% | -$10.3M |
|
|
FYBR
1533
PUT
DELISTED
Frontier Communications
FYBR
| $4.33M | ﹤0.01% |
165,600
-136,800
| -45% | -$3.4M |
|
|
EXAS
1534
CALL
DELISTED
Exact Sciences
EXAS
| $4.33M | ﹤0.01% |
102,600
-143,600
| -58% | -$7.9M |
|
1535
PUT
Procore
PCOR
$6.46B
| $4.33M | ﹤0.01% |
65,300
+59,900
| +1,109% | +$4.16M |
|
1536
CALL
Chord Energy
CHRD
$7.79B
| $4.33M | ﹤0.01% |
25,800
+14,000
| +119% | +$2.48M |
|
1537
CALL
Star Bulk Carriers
SBLK
$3.14B
| $4.32M | ﹤0.01% |
177,300
+38,800
| +28% | +$965K |
|
1538
Teradyne
TER
$54.8B
| $4.32M | ﹤0.01% |
+29,115
| New | +$3.7M |
|
1539
PUT
WillScot Mobile Mini Holdings
WSC
$4.8B
| $4.32M | ﹤0.01% |
114,700
+107,800
| +1,562% | +$4.27M |
|
1540
PUT
Alexandria Real Estate Equities
ARE
$8.88B
| $4.32M | ﹤0.01% |
36,900
-27,400
| -43% | -$3.27M |
|
1541
PUT
HSBC
HSBC
$355B
| $4.32M | ﹤0.01% |
99,200
-63,600
| -39% | -$2.74M |
|
1542
CALL
Xylem
XYL
$28.5B
| $4.31M | ﹤0.01% |
31,800
-2,700
| -8% | -$367K |
|
1543
Viking Therapeutics
VKTX
$4.04B
| $4.31M | ﹤0.01% |
81,307
+23,308
| +40% | +$1.53M |
|
1544
ProShares UltraPro Short QQQ
SQQQ
$2.21B
| $4.31M | ﹤0.01% |
20,808
-12,521
| -38% | -$3.19M |
|
1545
Adobe
ADBE
$89.5B
| $4.3M | ﹤0.01% |
7,751
-16,103
| -68% | -$7.8M |
|
1546
PUT
Brookfield Renewable
BEPC
$6.12B
| $4.3M | ﹤0.01% |
151,600
-30,700
| -17% | -$858K |
|
1547
PUT
Shake Shack
SHAK
$2.3B
| $4.3M | ﹤0.01% |
47,800
-14,100
| -23% | -$1.38M |
|
1548
PUT
Nextpower Inc
NXT
$15.2B
| $4.3M | ﹤0.01% |
91,700
-137,200
| -60% | -$6.82M |
|
1549
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $4.3M | ﹤0.01% |
178,000
+124,100
| +230% | +$2.36M |
|
1550
PUT
Edison International
EIX
$30.7B
| $4.29M | ﹤0.01% |
59,700
+14,700
| +33% | +$1.07M |
|
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.