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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NKLA
2901
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $1.13M | ﹤0.01% |
43,127
-10,100
| -19% | -$314K |
|
2902
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $1.13M | ﹤0.01% |
92,600
+74,400
| +409% | +$1.33M |
|
2903
CALL
Verra Mobility
VRRM
$615M
| $1.13M | ﹤0.01% |
49,100
+17,100
| +53% | +$351K |
|
2904
CALL
Coursera
COUR
$1.54B
| $1.12M | ﹤0.01% |
58,000
-42,900
| -43% | -$820K |
|
2905
CALL
Service Corp International
SCI
$11.4B
| $1.12M | ﹤0.01% |
16,400
+10,900
| +198% | +$656K |
|
2906
PUT
Atkore
ATKR
$2.59B
| $1.12M | ﹤0.01% |
7,000
+2,300
| +49% | +$317K |
|
2907
Revolve Group
RVLV
$1.79B
| $1.12M | ﹤0.01% |
67,457
+5,602
| +9% | +$82.7K |
|
|
CMBT
2908
PUT
CMB.TECH NV
CMBT
$4.57B
| $1.12M | ﹤0.01% |
63,600
+59,800
| +1,574% | +$1.06M |
|
2909
PUT
GigaCloud Technology
GCT
$1.35B
| $1.12M | ﹤0.01% |
+61,100
| New | +$673K |
|
2910
CALL
Box
BOX
$4.02B
| $1.12M | ﹤0.01% |
43,600
+10,600
| +32% | +$268K |
|
2911
CALL
Bank of Hawaii
BOH
$3.33B
| $1.11M | ﹤0.01% |
15,400
-17,400
| -53% | -$998K |
|
2912
CALL
Eagle Materials
EXP
$6.6B
| $1.11M | ﹤0.01% |
5,500
+2,800
| +104% | +$492K |
|
|
ACCD
2913
DELISTED
Accolade Inc
ACCD
| $1.11M | ﹤0.01% |
92,648
+45,653
| +97% | +$391K |
|
2914
CALL
Jackson Financial
JXN
$8.32B
| $1.11M | ﹤0.01% |
21,700
-2,200
| -9% | -$96.8K |
|
2915
AvalonBay Communities
AVB
$27.1B
| $1.11M | ﹤0.01% |
5,924
-668
| -10% | -$117K |
|
2916
Welltower
WELL
$178B
| $1.11M | ﹤0.01% |
+12,305
| New | +$1.07M |
|
2917
Tenet Healthcare
THC
$20.1B
| $1.11M | ﹤0.01% |
+14,668
| New | +$930K |
|
2918
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $1.11M | ﹤0.01% |
15,500
-200
| -1% | -$11.8K |
|
2919
PUT
Kimco Realty
KIM
$17.6B
| $1.1M | ﹤0.01% |
51,900
+23,900
| +85% | +$451K |
|
2920
Direxion Daily Gold Miners Index Bull 2X ETF
NUGT
$863M
| $1.1M | ﹤0.01% |
31,799
-63,150
| -67% | -$1.97M |
|
2921
Ralph Lauren
RL
$22.2B
| $1.1M | ﹤0.01% |
+7,658
| New | +$948K |
|
|
SILV
2922
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $1.1M | ﹤0.01% |
168,100
+127,300
| +312% | +$709K |
|
2923
PUT
Guardant Health
GH
$19.5B
| $1.1M | ﹤0.01% |
40,600
+10,900
| +37% | +$286K |
|
2924
PUT
Innoviz Technologies
INVZ
$135M
| $1.1M | ﹤0.01% |
433,900
+379,600
| +699% | +$727K |
|
2925
ProShares Ultra Dow30
DDM
$531M
| $1.1M | ﹤0.01% |
27,698
+3,106
| +13% | +$107K |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.