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 | |
|---|---|---|---|---|---|---|
2676
PUT
TE Connectivity
TEL
$58.8B
| $1.41M | ﹤0.01% |
10,000
+6,800
| +213% | +$875K |
|
2677
Nu Holdings
NU
$68.1B
| $1.4M | ﹤0.01% |
+168,662
| New | +$1.36M |
|
2678
PUT
Agree Realty
ADC
$9.68B
| $1.4M | ﹤0.01% |
22,300
+6,200
| +39% | +$359K |
|
2679
PUT
Arcus Biosciences
RCUS
$3.57B
| $1.4M | ﹤0.01% |
73,500
-32,300
| -31% | -$516K |
|
2680
CALL
Woodward
WWD
$25B
| $1.4M | ﹤0.01% |
10,300
+500
| +5% | +$65.4K |
|
2681
CALL
Amplify Online Retail ETF
IBUY
$106M
| $1.4M | ﹤0.01% |
49,300
-35,700
| -42% | -$1.67M |
|
2682
Jefferies Financial Group
JEF
$12.9B
| $1.4M | ﹤0.01% |
34,635
+29,342
| +554% | +$1.04M |
|
2683
CALL
Ventas
VTR
$48.9B
| $1.4M | ﹤0.01% |
28,000
+7,000
| +33% | +$314K |
|
2684
PUT
Alliance Resource Partners
ARLP
$3.18B
| $1.39M | ﹤0.01% |
65,800
+36,000
| +121% | +$779K |
|
2685
CALL
Fortive
FTV
$19B
| $1.39M | ﹤0.01% |
25,080
+3,184
| +15% | +$168K |
|
2686
Telephone and Data Systems
TDS
$3.91B
| $1.39M | ﹤0.01% |
75,791
-4,365
| -5% | -$80.6K |
|
2687
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $1.39M | ﹤0.01% |
28,900
+4,200
| +17% | +$114K |
|
2688
CALL
Huntington Bancshares
HBAN
$35.1B
| $1.39M | ﹤0.01% |
109,200
-17,900
| -14% | -$196K |
|
|
AL
2689
CALL
DELISTED
Air Lease Corp
AL
| $1.39M | ﹤0.01% |
33,100
+14,000
| +73% | +$530K |
|
2690
PUT
ChargePoint
CHPT
$133M
| $1.39M | ﹤0.01% |
29,675
-5,895
| -17% | -$330K |
|
2691
CALL
MKS Inc
MKSI
$22.2B
| $1.39M | ﹤0.01% |
13,500
+5,500
| +69% | +$447K |
|
2692
Spectrum Brands
SPB
$2.04B
| $1.39M | ﹤0.01% |
17,412
-13,444
| -44% | -$1.01M |
|
2693
CALL
Teradata
TDC
$2.68B
| $1.39M | ﹤0.01% |
31,900
+1,800
| +6% | +$80.9K |
|
2694
CALL
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$135M
| $1.39M | ﹤0.01% |
18,400
+18,300
| +18,300% | +$384K |
|
2695
CALL
ODDITY Tech
ODD
$708M
| $1.39M | ﹤0.01% |
29,800
+700
| +2% | +$23.7K |
|
|
SIX
2696
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.39M | ﹤0.01% |
55,300
-17,600
| -24% | -$406K |
|
|
SF
2697
CALL
Stifel
SF
$12.3B
| $1.38M | ﹤0.01% |
30,000
+28,050
| +1,438% | +$1.15M |
|
2698
Syndax Pharmaceuticals
SNDX
$1.84B
| $1.38M | ﹤0.01% |
+64,030
| New | +$984K |
|
|
HA
2699
DELISTED
Hawaiian Holdings, Inc.
HA
| $1.38M | ﹤0.01% |
97,358
+86,097
| +765% | +$639K |
|
2700
CALL
Natural Resource Partners
NRP
$1.3B
| $1.38M | ﹤0.01% |
14,900
-13,700
| -48% | -$1.05M |
|
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.