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 | |
|---|---|---|---|---|---|---|
2776
Ormat Technologies
ORA
$6.11B
| $898K | ﹤0.01% |
+12,848
| New | +$996K |
|
2777
PUT
Yelp
YELP
$1.38B
| $898K | ﹤0.01% |
21,600
-122,100
| -85% | -$5.14M |
|
2778
CALL
Brinker International
EAT
$8.02B
| $897K | ﹤0.01% |
28,400
+23,300
| +457% | +$815K |
|
2779
Vanguard World Funds Extended Duration ETF
EDV
$3.3B
| $897K | ﹤0.01% |
12,812
+11,160
| +676% | +$877K |
|
2780
CALL
Howmet Aerospace
HWM
$116B
| $897K | ﹤0.01% |
19,400
-3,400
| -15% | -$166K |
|
2781
PUT
Amplify Online Retail ETF
IBUY
$106M
| $895K | ﹤0.01% |
43,900
-67,400
| -61% | -$3.23M |
|
2782
ICICI Bank
IBN
$106B
| $894K | ﹤0.01% |
+38,685
| New | +$910K |
|
|
LOGC
2783
PUT
DELISTED
ContextLogic
LOGC
| $894K | ﹤0.01% |
202,900
+24,600
| +14% | +$153K |
|
2784
PUT
Global Ship Lease
GSL
$1.57B
| $893K | ﹤0.01% |
48,700
-10,600
| -18% | -$207K |
|
|
PENG
2785
Penguin Solutions Inc
PENG
$2.76B
| $891K | ﹤0.01% |
+36,613
| New | +$925K |
|
2786
CALL
AST SpaceMobile
ASTS
$16.8B
| $890K | ﹤0.01% |
234,300
+75,900
| +48% | +$306K |
|
2787
PUT
Globant
GLOB
$1.35B
| $890K | ﹤0.01% |
4,500
-800
| -15% | -$150K |
|
2788
PUT
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $890K | ﹤0.01% |
42,000
-3,200
| -7% | -$76.9K |
|
|
SPR
2789
DELISTED
Spirit AeroSystems
SPR
| $890K | ﹤0.01% |
55,197
+35,952
| +187% | +$827K |
|
|
QLTB
2790
CALL
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $890K | ﹤0.01% |
14,600
-8,800
| -38% | -$536K |
|
2791
PUT
Agree Realty
ADC
$9.68B
| $889K | ﹤0.01% |
16,100
+15,600
| +3,120% | +$975K |
|
2792
CALL
SouthState Bank Corp
SSB
$10.3B
| $889K | ﹤0.01% |
13,200
+6,000
| +83% | +$433K |
|
2793
PUT
Ginkgo Bioworks
DNA
$481M
| $888K | ﹤0.01% |
12,273
-2,902
| -19% | -$232K |
|
2794
PUT
Axsome Therapeutics
AXSM
$12.4B
| $887K | ﹤0.01% |
12,700
-39,100
| -75% | -$2.92M |
|
|
ACCD
2795
PUT
DELISTED
Accolade Inc
ACCD
| $886K | ﹤0.01% |
83,800
-12,700
| -13% | -$167K |
|
2796
CALL
Ventas
VTR
$48.9B
| $884K | ﹤0.01% |
21,000
-52,400
| -71% | -$2.36M |
|
2797
CALL
Guidewire Software
GWRE
$11.5B
| $882K | ﹤0.01% |
9,800
-37,000
| -79% | -$3.09M |
|
|
COOP
2798
DELISTED
Mr. Cooper
COOP
| $881K | ﹤0.01% |
+16,452
| New | +$904K |
|
2799
Mercer International
MERC
$44.9M
| $881K | ﹤0.01% |
102,722
+98,605
| +2,395% | +$850K |
|
2800
PUT
Rithm Capital
RITM
$5.09B
| $881K | ﹤0.01% |
94,900
-54,000
| -36% | -$532K |
|
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.