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 | |
|---|---|---|---|---|---|---|
5076
Schwab US Dividend Equity ETF
SCHD
$102B
| $135K | ﹤0.01% |
5,340
-30,102
| -85% | -$717K |
|
5077
CALL
Urban One Class D
UONEK
$21.9M
| $135K | ﹤0.01% |
3,360
+3,100
| +1,192% | +$142K |
|
5078
PUT
Ashland
ASH
$3.31B
| $134K | ﹤0.01% |
1,600
+700
| +78% | +$55.5K |
|
5079
PUT
Delek US
DK
$4.15B
| $134K | ﹤0.01% |
5,200
-9,900
| -66% | -$262K |
|
5080
PUT
Enovis
ENOV
$1.64B
| $134K | ﹤0.01% |
2,400
-200
| -8% | -$9.97K |
|
5081
CALL
The Ensign Group
ENSG
$10.3B
| $134K | ﹤0.01% |
1,200
+900
| +300% | +$93K |
|
|
OBE
5082
CALL
Obsidian Energy
OBE
$694M
| $134K | ﹤0.01% |
19,800
-9,400
| -32% | -$72.4K |
|
5083
SFL Corp
SFL
$1.64B
| $134K | ﹤0.01% |
11,904
-2,241
| -16% | -$24.9K |
|
5084
CALL
Sotera Health
SHC
$5.06B
| $134K | ﹤0.01% |
8,000
+2,700
| +51% | +$38.2K |
|
|
WCN
5085
PUT
Waste Connections
WCN
$42.2B
| $134K | ﹤0.01% |
900
-600
| -40% | -$82.4K |
|
|
NS
5086
CALL
DELISTED
NuStar Energy L.P.
NS
| $134K | ﹤0.01% |
7,200
-44,500
| -86% | -$795K |
|
|
EBIX
5087
CALL
DELISTED
Ebix Inc
EBIX
| $134K | ﹤0.01% |
129,300
-148,800
| -54% | -$748K |
|
5088
Direxion Daily Aerospace & Defense Bull 3X ETF
DFEN
$373M
| $133K | ﹤0.01% |
+5,443
| New | +$104K |
|
|
FARM
5089
DELISTED
Farmer Brothers
FARM
| $133K | ﹤0.01% |
43,640
+41,694
| +2,143% | +$114K |
|
5090
PUT
Gladstone Investment Corp
GAIN
$649M
| $133K | ﹤0.01% |
9,400
+9,300
| +9,300% | +$128K |
|
5091
Matrix Service
MTRX
$324M
| $133K | ﹤0.01% |
13,696
+12,508
| +1,053% | +$136K |
|
|
ACH
5092
Accendra Health
ACH
$252M
| $133K | ﹤0.01% |
6,910
+6,771
| +4,871% | +$123K |
|
5093
CALL
Pangaea Logistics
PANL
$493M
| $133K | ﹤0.01% |
16,200
-4,000
| -20% | -$26.9K |
|
5094
CALL
RLI Corp
RLI
$5.59B
| $133K | ﹤0.01% |
+2,000
| New | +$134K |
|
5095
CALL
Commerce Bancshares
CBSH
$8.53B
| $132K | ﹤0.01% |
2,729
+2,497
| +1,076% | +$108K |
|
5096
CALL
Driven Brands
DRVN
$2.34B
| $132K | ﹤0.01% |
9,300
+2,000
| +27% | +$24.9K |
|
5097
PUT
Forward Air
FWRD
$448M
| $132K | ﹤0.01% |
2,100
-66,100
| -97% | -$4.45M |
|
5098
CALL
Roundhill Ball Metaverse ETF
METV
$210M
| $132K | ﹤0.01% |
10,800
+7,400
| +218% | +$76.3K |
|
|
SQSP
5099
PUT
DELISTED
Squarespace, Inc.
SQSP
| $132K | ﹤0.01% |
4,000
-25,900
| -87% | -$758K |
|
5100
Evolution Petroleum
EPM
$131M
| $131K | ﹤0.01% |
22,557
+12,158
| +117% | +$74.4K |
|
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.