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 | |
|---|---|---|---|---|---|---|
4751
CALL
Fidelity Corporate Bond ETF
FCOR
$353M
| $139K | ﹤0.01% |
3,200
-100
| -3% | -$4.5K |
|
4752
CALL
Future Fuel
FF
$205M
| $139K | ﹤0.01% |
19,500
-18,200
| -48% | -$149K |
|
4753
CALL
SITE Centers
SITC
$236M
| $139K | ﹤0.01% |
+14,484
| New | +$153K |
|
|
SOL
4754
DELISTED
Emeren Group
SOL
| $139K | ﹤0.01% |
45,211
-1,128
| -2% | -$3.91K |
|
4755
PUT
Taboola.com
TBLA
$1.41B
| $139K | ﹤0.01% |
36,700
+3,300
| +10% | +$11.6K |
|
4756
CALL
Zevra Therapeutics
ZVRA
$578M
| $139K | ﹤0.01% |
29,000
-21,900
| -43% | -$109K |
|
4757
CALL
Graco
GGG
$13.2B
| $138K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$142K |
|
4758
CALL
Janus International
JBI
$702M
| $138K | ﹤0.01% |
12,900
+10,100
| +361% | +$111K |
|
|
MESO
4759
CALL
Mesoblast
MESO
$1.83B
| $138K | ﹤0.01% |
56,500
+47,650
| +538% | +$228K |
|
4760
CALL
Pitney Bowes
PBI
$2.39B
| $138K | ﹤0.01% |
46,000
-107,400
| -70% | -$368K |
|
4761
CALL
Pulse Biosciences
PLSE
$2.37B
| $138K | ﹤0.01% |
34,300
+31,400
| +1,083% | +$195K |
|
|
AVDX
4762
CALL
DELISTED
AvidXchange
AVDX
| $137K | ﹤0.01% |
14,500
-97,500
| -87% | -$1.02M |
|
|
CAN
4763
Canaan Creative
CAN
$172M
| $137K | ﹤0.01% |
75,512
+50,440
| +201% | +$119K |
|
4764
PUT
Coherus Oncology
CHRS
$217M
| $137K | ﹤0.01% |
36,700
-6,500
| -15% | -$30K |
|
4765
CALL
Endava
DAVA
$165M
| $137K | ﹤0.01% |
2,400
-100
| -4% | -$5.21K |
|
4766
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
| $137K | ﹤0.01% |
5,500
+1,000
| +22% | +$24.4K |
|
4767
PUT
Enovis
ENOV
$1.74B
| $137K | ﹤0.01% |
2,600
+2,200
| +550% | +$128K |
|
4768
CALL
Honda
HMC
$39.8B
| $137K | ﹤0.01% |
4,100
-32,100
| -89% | -$1.03M |
|
4769
CALL
MarineMax
HZO
$748M
| $137K | ﹤0.01% |
4,200
-3,600
| -46% | -$125K |
|
4770
Kinross Gold
KGC
$27.7B
| $137K | ﹤0.01% |
30,244
-163,249
| -84% | -$800K |
|
4771
CALL
SmartRent
SMRT
$192M
| $137K | ﹤0.01% |
52,700
+50,700
| +2,535% | +$172K |
|
4772
PUT
Telus
TU
$17.4B
| $137K | ﹤0.01% |
8,400
-5,900
| -41% | -$104K |
|
|
MTTR
4773
CALL
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $137K | ﹤0.01% |
63,300
+7,500
| +13% | +$21K |
|
|
INST
4774
CALL
DELISTED
Instructure Holdings, Inc.
INST
| $137K | ﹤0.01% |
5,400
+3,400
| +170% | +$88.1K |
|
4775
PUT
Bread Financial
BFH
$4.32B
| $136K | ﹤0.01% |
4,000
| – | – |
|
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.