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 | |
|---|---|---|---|---|---|---|
2426
PUT
Array Technologies
ARRY
$818M
| $1.31M | ﹤0.01% |
59,300
-40,600
| -41% | -$882K |
|
|
JKS
2427
CALL
JinkoSolar
JKS
$775M
| $1.31M | ﹤0.01% |
43,300
+25,600
| +145% | +$919K |
|
2428
PUT
Kanzhun
BZ
$6.89B
| $1.31M | ﹤0.01% |
86,600
+24,900
| +40% | +$391K |
|
2429
PUT
Kimbell Royalty Partners
KRP
$1.47B
| $1.31M | ﹤0.01% |
82,100
+56,500
| +221% | +$857K |
|
2430
PUT
PureCycle Technologies
PCT
$1.17B
| $1.31M | ﹤0.01% |
234,200
+190,800
| +440% | +$1.79M |
|
2431
PUT
Baker Hughes
BKR
$56.8B
| $1.31M | ﹤0.01% |
37,100
-19,400
| -34% | -$687K |
|
2432
PUT
Equitable Holdings
EQH
$13.1B
| $1.31M | ﹤0.01% |
46,100
-7,300
| -14% | -$206K |
|
|
AMAM
2433
PUT
DELISTED
Ambrx Biopharma Inc
AMAM
| $1.3M | ﹤0.01% |
113,500
+62,800
| +124% | +$855K |
|
2434
Stanley Black & Decker
SWK
$14.2B
| $1.3M | ﹤0.01% |
+15,612
| New | +$1.45M |
|
2435
CALL
Prospect Capital
PSEC
$1.06B
| $1.3M | ﹤0.01% |
215,300
+97,400
| +83% | +$607K |
|
2436
CALL
Lightspeed Commerce
LSPD
$1.3B
| $1.3M | ﹤0.01% |
92,600
-69,300
| -43% | -$1.12M |
|
2437
PUT
Cars.com
CARS
$641M
| $1.3M | ﹤0.01% |
76,900
-53,100
| -41% | -$1.04M |
|
2438
PUT
PagSeguro Digital
PAGS
$2.57B
| $1.29M | ﹤0.01% |
150,300
+76,600
| +104% | +$721K |
|
|
VTLE
2439
DELISTED
Vital Energy
VTLE
| $1.29M | ﹤0.01% |
23,304
-6,966
| -23% | -$374K |
|
2440
Royalty Pharma
RPRX
$26.1B
| $1.29M | ﹤0.01% |
47,512
+20,816
| +78% | +$618K |
|
2441
O'Reilly Automotive
ORLY
$72.4B
| $1.29M | ﹤0.01% |
+21,270
| New | +$1.33M |
|
|
SAGE
2442
PUT
DELISTED
Sage Therapeutics
SAGE
| $1.29M | ﹤0.01% |
62,500
+56,400
| +925% | +$1.63M |
|
2443
Odyssey Marine Exploration
OMEX
$40.4M
| $1.28M | ﹤0.01% |
341,961
+338,280
| +9,190% | +$1.28M |
|
2444
PUT
Valaris
VAL
$5.51B
| $1.27M | ﹤0.01% |
17,000
+13,800
| +431% | +$1.01M |
|
2445
Thomson Reuters
TRI
$39.4B
| $1.27M | ﹤0.01% |
10,248
+281
| +3% | +$37K |
|
2446
CALL
Flowserve
FLS
$9.25B
| $1.27M | ﹤0.01% |
32,000
+28,200
| +742% | +$1.09M |
|
2447
CALL
Piper Sandler
PIPR
$5.14B
| $1.26M | ﹤0.01% |
34,800
+34,400
| +8,600% | +$1.24M |
|
2448
CALL
DHT Holdings
DHT
$2.97B
| $1.26M | ﹤0.01% |
122,700
-17,800
| -13% | -$167K |
|
|
EMBJ
2449
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $1.26M | ﹤0.01% |
92,100
-29,000
| -24% | -$432K |
|
|
HBI
2450
CALL
DELISTED
Hanesbrands
HBI
| $1.26M | ﹤0.01% |
318,900
+29,500
| +10% | +$143K |
|
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.