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 | |
|---|---|---|---|---|---|---|
2726
PUT
ICICI Bank
IBN
$106B
| $1.35M | ﹤0.01% |
56,800
-15,400
| -21% | -$355K |
|
2727
CALL
Manulife Financial
MFC
$72.6B
| $1.35M | ﹤0.01% |
61,300
+34,500
| +129% | +$663K |
|
2728
CALL
FS KKR Capital
FSK
$2.98B
| $1.35M | ﹤0.01% |
67,800
+24,100
| +55% | +$473K |
|
|
HBI
2729
CALL
DELISTED
Hanesbrands
HBI
| $1.35M | ﹤0.01% |
302,100
-16,800
| -5% | -$68.4K |
|
2730
CALL
EVgo
EVGO
$200M
| $1.34M | ﹤0.01% |
375,800
+69,100
| +23% | +$205K |
|
2731
PUT
Gaotu Techedu
GOTU
$372M
| $1.34M | ﹤0.01% |
371,800
+335,500
| +924% | +$943K |
|
|
LAC
2732
PUT
Lithium Americas
LAC
$986M
| $1.34M | ﹤0.01% |
+139,900
| New | +$1.04M |
|
2733
CALL
Popular Inc
BPOP
$11B
| $1.34M | ﹤0.01% |
16,300
+16,000
| +5,333% | +$1.13M |
|
2734
PUT
Tyler Technologies
TYL
$12.2B
| $1.34M | ﹤0.01% |
3,200
+3,100
| +3,100% | +$1.24M |
|
2735
CALL
Upwork
UPWK
$1.09B
| $1.34M | ﹤0.01% |
89,900
+61,800
| +220% | +$797K |
|
2736
CALL
Crown Holdings
CCK
$12.8B
| $1.33M | ﹤0.01% |
14,500
+5,400
| +59% | +$458K |
|
|
HUYA
2737
PUT
Huya Inc
HUYA
$542M
| $1.33M | ﹤0.01% |
364,900
+117,600
| +48% | +$394K |
|
2738
Freedom Holding
FRHC
$9.61B
| $1.33M | ﹤0.01% |
16,559
-14,171
| -46% | -$1.15M |
|
2739
Roivant Sciences
ROIV
$25.2B
| $1.33M | ﹤0.01% |
118,714
+116,009
| +4,289% | +$1.13M |
|
2740
Global X Silver Miners ETF NEW
SIL
$4.08B
| $1.33M | ﹤0.01% |
47,005
+25,591
| +120% | +$657K |
|
2741
CALL
Iridium Communications
IRDM
$4.85B
| $1.33M | ﹤0.01% |
32,300
+21,200
| +191% | +$839K |
|
2742
PUT
Madison Square Garden
MSGS
$9.54B
| $1.33M | ﹤0.01% |
7,300
-3,700
| -34% | -$641K |
|
2743
PUT
RingCentral
RNG
$4.05B
| $1.33M | ﹤0.01% |
39,100
-400
| -1% | -$11.9K |
|
|
2744
PUT
Crown Holdings
CCK
$12.8B
| $1.33M | ﹤0.01% |
14,400
+3,500
| +32% | +$297K |
|
2745
PUT
PureCycle Technologies
PCT
$1.17B
| $1.33M | ﹤0.01% |
327,500
+93,300
| +40% | +$410K |
|
2746
Applovin
APP
$132B
| $1.32M | ﹤0.01% |
+33,259
| New | +$1.3M |
|
2747
CALL
CONMED
CNMD
$1.29B
| $1.32M | ﹤0.01% |
12,100
-27,000
| -69% | -$2.79M |
|
|
BLD
2748
DELISTED
TopBuild
BLD
| $1.32M | ﹤0.01% |
+3,540
| New | +$1.01M |
|
2749
PUT
Cullen/Frost Bankers
CFR
$10.3B
| $1.32M | ﹤0.01% |
12,200
-7,100
| -37% | -$689K |
|
2750
PUT
Valaris
VAL
$5.51B
| $1.32M | ﹤0.01% |
19,300
+2,300
| +14% | +$158K |
|
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.