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 | |
|---|---|---|---|---|---|---|
3676
CALL
Cerence
CRNC
$368M
| $382K | ﹤0.01% |
18,800
-35,500
| -65% | -$893K |
|
3677
PUT
FingerMotion
FNGR
$16M
| $382K | ﹤0.01% |
61,600
+51,200
| +492% | +$271K |
|
3678
Gartner
IT
$10.4B
| $382K | ﹤0.01% |
1,113
+312
| +39% | +$109K |
|
3679
CALL
Agree Realty
ADC
$9.74B
| $381K | ﹤0.01% |
6,900
+6,600
| +2,200% | +$413K |
|
|
MOMO
3680
CALL
Hello Group
MOMO
$869M
| $381K | ﹤0.01% |
54,600
-21,900
| -29% | -$201K |
|
3681
PUT
Owens Corning
OC
$11.5B
| $381K | ﹤0.01% |
2,800
-700
| -20% | -$96.2K |
|
3682
Opendoor
OPEN
$3.8B
| $381K | ﹤0.01% |
149,295
+136,688
| +1,084% | +$493K |
|
3683
PUT
BRC Group Holdings
RILY
$270M
| $381K | ﹤0.01% |
9,300
-12,800
| -58% | -$630K |
|
3684
PUT
BrightView Holdings
BV
$1.3B
| $380K | ﹤0.01% |
49,100
| – | – |
|
3685
PUT
Carter's
CRI
$1.45B
| $380K | ﹤0.01% |
5,500
-2,100
| -28% | -$150K |
|
|
DADA
3686
PUT
DELISTED
Dada Nexus
DADA
| $380K | ﹤0.01% |
85,600
-20,300
| -19% | -$108K |
|
|
FOLD
3687
DELISTED
Amicus Therapeutics
FOLD
| $380K | ﹤0.01% |
+31,319
| New | +$404K |
|
3688
CALL
Napco Security Technologies
NSSC
$1.33B
| $380K | ﹤0.01% |
+17,100
| New | +$519K |
|
|
XXII
3689
CALL
22nd Century Group
XXII
$1.36M
| – | – |
0
| – | – |
|
3690
CALL
Fluence Energy
FLNC
$1.68B
| $379K | ﹤0.01% |
16,500
-60,600
| -79% | -$1.56M |
|
|
AL
3691
PUT
DELISTED
Air Lease Corp
AL
| $378K | ﹤0.01% |
9,600
-100
| -1% | -$4.11K |
|
3692
PUT
BlackLine
BL
$1.87B
| $377K | ﹤0.01% |
6,800
+2,100
| +45% | +$115K |
|
3693
CALL
Cogent Communications
CCOI
$649M
| $377K | ﹤0.01% |
6,100
+5,800
| +1,933% | +$379K |
|
3694
PUT
IHS Holding
IHS
$2.78B
| $377K | ﹤0.01% |
68,000
+67,500
| +13,500% | +$500K |
|
3695
Concentrix
CNXC
$1.55B
| $376K | ﹤0.01% |
4,701
-1,358
| -22% | -$107K |
|
3696
Evercore
EVR
$13.2B
| $376K | ﹤0.01% |
2,732
+1,463
| +115% | +$199K |
|
3697
PUT
eHealth
EHTH
$43.2M
| $375K | ﹤0.01% |
50,800
-2,000
| -4% | -$15.7K |
|
3698
CALL
Aclaris Therapeutics
ACRS
$744M
| $374K | ﹤0.01% |
54,700
+42,200
| +338% | +$361K |
|
3699
CALL
Copa Holdings
CPA
$5.71B
| $374K | ﹤0.01% |
4,200
+3,200
| +320% | +$332K |
|
3700
Ardmore Shipping
ASC
$669M
| $373K | ﹤0.01% |
+28,692
| New | +$369K |
|
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.