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 | |
|---|---|---|---|---|---|---|
5776
PUT
Kodak
KODK
$805M
| $68K | ﹤0.01% |
17,500
+700
| +4% | +$2.69K |
|
5777
PUT
Kontoor Brands
KTB
$4.61B
| $68K | ﹤0.01% |
1,100
-4,100
| -79% | -$211K |
|
5778
CALL
LivePerson
LPSN
$22M
| $68K | ﹤0.01% |
1,213
+540
| +80% | +$24.9K |
|
5779
PUT
Mativ Holdings
MATV
$473M
| $68K | ﹤0.01% |
4,500
-1,800
| -29% | -$24.3K |
|
5780
PUT
MGP Ingredients
MGPI
$376M
| $68K | ﹤0.01% |
+700
| New | +$67.3K |
|
5781
PUT
OneSpan
OSPN
$566M
| $68K | ﹤0.01% |
+6,400
| New | +$62.8K |
|
5782
VeriSign
VRSN
$26.2B
| $68K | ﹤0.01% |
+331
| New | +$68.9K |
|
|
OKUR
5783
PUT
OnKure Therapeutics
OKUR
$152M
| $68K | ﹤0.01% |
4,280
+4,040
| +1,683% | +$252K |
|
|
AEVA
5784
Aeva Technologies
AEVA
$1.17B
| $67K | ﹤0.01% |
17,760
-597
| -3% | -$1.91K |
|
|
APLT
5785
CALL
DELISTED
Applied Therapeutics
APLT
| $67K | ﹤0.01% |
20,200
-67,200
| -77% | -$167K |
|
5786
CALL
AtriCure
ATRC
$1.93B
| $67K | ﹤0.01% |
+1,900
| New | +$70.7K |
|
|
CGAU
5787
CALL
Centerra Gold
CGAU
$3.41B
| $67K | ﹤0.01% |
11,400
+3,000
| +36% | +$16.4K |
|
5788
CALL
CareTrust REIT
CTRE
$9.87B
| $67K | ﹤0.01% |
3,000
-14,200
| -83% | -$314K |
|
5789
CALL
Empire State Realty Trust
ESRT
$872M
| $67K | ﹤0.01% |
7,000
+5,700
| +438% | +$49.4K |
|
5790
FingerMotion
FNGR
$14.2M
| $67K | ﹤0.01% |
+16,846
| New | +$83.3K |
|
5791
CALL
Idaho Strategic Resources
IDR
$451M
| $67K | ﹤0.01% |
10,600
-10,700
| -50% | -$59.2K |
|
5792
CALL
Novanta
NOVT
$5.09B
| $67K | ﹤0.01% |
+400
| New | +$58.3K |
|
5793
CALL
Quanex
NX
$822M
| $67K | ﹤0.01% |
+2,200
| New | +$64.9K |
|
|
ORLA
5794
Orla Mining
ORLA
$3.54B
| $67K | ﹤0.01% |
+20,914
| New | +$65.7K |
|
5795
Ranpak Holdings
PACK
$428M
| $67K | ﹤0.01% |
11,619
-208
| -2% | -$879 |
|
5796
Smith & Wesson
SWBI
$645M
| $67K | ﹤0.01% |
4,996
+349
| +8% | +$4.8K |
|
5797
PUT
Cambria Tail Risk ETF
TAIL
$147M
| $67K | ﹤0.01% |
1,000
| – | – |
|
5798
Direxion Daily Robotics Artificial Intelligence & Automation Index Bull 2X ETF
UBOT
$23.6M
| $67K | ﹤0.01% |
3,267
+2,870
| +723% | +$48.5K |
|
5799
CALL
Universal Corp
UVV
$1.33B
| $67K | ﹤0.01% |
1,000
+200
| +25% | +$10.7K |
|
5800
CALL
Vitesse Energy
VTS
$642M
| $67K | ﹤0.01% |
3,100
| – | – |
|
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.