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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
RTX Corp
RTX
$262B
| $38.9M | 0.03% |
541,000
+352,700
| +187% | +$30.2M |
|
352
CALL
Scorpio Tankers
STNG
$3.9B
| $38.8M | 0.03% |
717,200
+222,200
| +45% | +$10.9M |
|
353
PUT
DexCom
DXCM
$27.6B
| $38.8M | 0.03% |
415,700
+210,100
| +102% | +$23.7M |
|
354
CALL
BP
BP
$112B
| $38.7M | 0.03% |
999,400
-249,200
| -20% | -$9.25M |
|
355
PUT
Delta Air Lines
DAL
$54.9B
| $38.7M | 0.03% |
1,045,500
-288,200
| -22% | -$12.5M |
|
356
CALL
Cloudflare
NET
$95.5B
| $38M | 0.03% |
602,700
+51,100
| +9% | +$3.27M |
|
357
PUT
Li Auto
LI
$12B
| $37.8M | 0.03% |
1,060,800
-102,900
| -9% | -$4.06M |
|
358
PUT
Twilio
TWLO
$27.8B
| $37.8M | 0.03% |
645,800
-8,900
| -1% | -$555K |
|
359
CALL
Air Products & Chemicals
APD
$66.1B
| $37.7M | 0.03% |
133,200
+11,800
| +10% | +$3.46M |
|
360
PUT
NextEra Energy
NEE
$186B
| $37.6M | 0.03% |
657,000
+232,400
| +55% | +$16.1M |
|
361
PUT
VanEck Durable High Dividend ETF
DURA
$38.5M
| $37.3M | 0.03% |
112,300
-136,100
| -55% | -$4.3M |
|
362
CALL
Apollo Global Management
APO
$68.6B
| $37.3M | 0.03% |
415,400
+5,800
| +1% | +$488K |
|
|
363
CALL
NextEra Energy
NEE
$186B
| $37.3M | 0.03% |
650,300
+61,200
| +10% | +$4.24M |
|
364
CALL
Arista Networks
ANET
$220B
| $37.2M | 0.03% |
810,000
-190,800
| -19% | -$8.5M |
|
365
PUT
MGM Resorts International
MGM
$11.6B
| $37M | 0.03% |
1,007,200
+595,800
| +145% | +$26.3M |
|
366
PUT
Shell
SHEL
$243B
| $36.9M | 0.03% |
572,900
+48,100
| +9% | +$2.99M |
|
367
CALL
PNC Financial Services
PNC
$101B
| $36.9M | 0.03% |
300,300
-132,900
| -31% | -$16.7M |
|
368
CALL
Phillips 66
PSX
$84.8B
| $36.9M | 0.03% |
306,700
+76,300
| +33% | +$8.56M |
|
369
CALL
Wynn Resorts
WYNN
$9.79B
| $36.7M | 0.03% |
396,700
-90,300
| -19% | -$9.06M |
|
|
B
370
CALL
Barrick Mining
B
$62.8B
| $36.6M | 0.03% |
2,763,800
-59,800
| -2% | -$980K |
|
371
PUT
Waste Management
WM
$94.9B
| $36.5M | 0.03% |
239,600
+187,500
| +360% | +$30.3M |
|
372
CALL
Kenvue
KVUE
$36.7B
| $36.5M | 0.03% |
1,816,600
+1,726,600
| +1,918% | +$40M |
|
373
CALL
Pool Corp
POOL
$7.15B
| $36.4M | 0.03% |
102,200
+1,400
| +1% | +$510K |
|
374
PUT
Roblox
RBLX
$35.5B
| $36.4M | 0.03% |
1,256,500
+58,900
| +5% | +$1.96M |
|
375
CALL
Petrobras
PBR
$122B
| $36.4M | 0.03% |
2,437,200
+427,400
| +21% | +$6.08M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.