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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
376
PUT
KLA
KLAC
$280B
| $33.2M | 0.03% |
684,000
+250,000
| +58% | +$10.4M |
|
377
CALL
Teck Resources
TECK
$28B
| $32.8M | 0.03% |
778,800
+510,000
| +190% | +$21.9M |
|
378
CALL
Agnico Eagle Mines
AEM
$73.5B
| $32.8M | 0.03% |
655,900
-82,800
| -11% | -$4.48M |
|
|
WWE
379
PUT
DELISTED
World Wrestling Entertainment
WWE
| $32.8M | 0.03% |
302,100
+8,300
| +3% | +$859K |
|
380
PUT
Avis
CAR
$5.81B
| $32.6M | 0.03% |
142,700
-16,800
| -11% | -$3.08M |
|
381
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $32.6M | 0.03% |
986,100
+90,700
| +10% | +$1.64M |
|
382
CALL
Wayfair
W
$11.1B
| $32.6M | 0.03% |
500,900
-312,600
| -38% | -$13.2M |
|
383
PUT
Novartis
NVS
$292B
| $32.5M | 0.03% |
322,000
-127,100
| -28% | -$12.7M |
|
384
PUT
Sea Limited
SE
$64.2B
| $32.5M | 0.03% |
559,600
+39,100
| +8% | +$2.79M |
|
385
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $32.4M | 0.03% |
528,800
+210,100
| +66% | +$10.3M |
|
386
CALL
Intuitive Surgical
ISRG
$121B
| $32.3M | 0.03% |
94,400
-14,700
| -13% | -$4.45M |
|
387
CALL
Spotify
SPOT
$97.5B
| $32.2M | 0.03% |
200,500
-170,100
| -46% | -$24.6M |
|
388
CALL
XPeng
XPEV
$12.3B
| $32.2M | 0.03% |
2,397,200
+477,700
| +25% | +$4.71M |
|
389
CALL
Medtronic
MDT
$105B
| $32M | 0.03% |
363,600
-113,600
| -24% | -$9.78M |
|
390
CALL
Invesco Aerospace & Defense ETF
PPA
$8.03B
| $32M | 0.03% |
236,700
+95,000
| +67% | +$7.67M |
|
391
CALL
Halliburton
HAL
$27.6B
| $31.9M | 0.03% |
967,700
-58,900
| -6% | -$1.86M |
|
392
CALL
RH
RH
$3.31B
| $31.9M | 0.03% |
96,700
-76,500
| -44% | -$20M |
|
393
Verizon
VZ
$185B
| $31.8M | 0.03% |
854,067
+252,053
| +42% | +$9.33M |
|
394
CALL
ON Semiconductor
ON
$35.9B
| $31.8M | 0.03% |
335,800
-519,500
| -61% | -$43M |
|
395
PUT
Shell
SHEL
$243B
| $31.7M | 0.03% |
524,800
+48,400
| +10% | +$2.9M |
|
396
PUT
Petrobras
PBR
$122B
| $31.6M | 0.03% |
2,289,000
-623,200
| -21% | -$7.58M |
|
397
PUT
AMC Entertainment Holdings
AMC
$2.01B
| $31.6M | 0.03% |
742,220
-26,430
| -3% | -$1.31M |
|
398
PUT
NextEra Energy
NEE
$186B
| $31.5M | 0.03% |
424,600
-275,200
| -39% | -$20.8M |
|
399
CALL
Apollo Global Management
APO
$68.6B
| $31.5M | 0.03% |
409,600
+144,800
| +55% | +$9.68M |
|
400
CALL
Abbott
ABT
$175B
| $31.3M | 0.03% |
443,000
+18,500
| +4% | +$1.97M |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.