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 | |
|---|---|---|---|---|---|---|
5601
PUT
Banner Corp
BANR
$2.39B
| $80K | ﹤0.01% |
1,500
| – | – |
|
5602
CALL
Cognyte Software
CGNT
$659M
| $80K | ﹤0.01% |
12,500
-1,600
| -11% | -$8K |
|
5603
PUT
Excelerate Energy
EE
$1.25B
| $80K | ﹤0.01% |
5,200
+4,200
| +420% | +$67.5K |
|
5604
PUT
Element Solutions
ESI
$8.95B
| $80K | ﹤0.01% |
3,500
-9,000
| -72% | -$182K |
|
5605
iShares MSCI Malaysia ETF
EWM
$310M
| $80K | ﹤0.01% |
3,773
+442
| +13% | +$9.28K |
|
5606
CALL
MoneyHero
MNY
$42.7M
| $80K | ﹤0.01% |
+47,000
| New | +$93.3K |
|
|
MVO
5607
DELISTED
MV Oil Trust
MVO
| $80K | ﹤0.01% |
6,735
+3,527
| +110% | +$43K |
|
5608
CALL
Regenxbio
RGNX
$620M
| $80K | ﹤0.01% |
4,500
+4,000
| +800% | +$70.5K |
|
|
UROY
5609
PUT
Uranium Royalty Corp
UROY
$1.3B
| $80K | ﹤0.01% |
29,900
+11,400
| +62% | +$31.9K |
|
5610
CALL
Atomera
ATOM
$200M
| $79K | ﹤0.01% |
11,400
-26,900
| -70% | -$178K |
|
|
DEA
5611
CALL
Easterly Government Properties
DEA
$1.13B
| $79K | ﹤0.01% |
2,360
-840
| -26% | -$24.8K |
|
5612
PUT
Park Hotels & Resorts
PK
$3.03B
| $79K | ﹤0.01% |
5,200
-10,400
| -67% | -$143K |
|
5613
CALL
PSQ Holdings
PSQH
$13.9M
| $79K | ﹤0.01% |
1,007
-593
| -37% | -$53.5K |
|
5614
CALL
Rimini Street
RMNI
$445M
| $79K | ﹤0.01% |
24,200
+21,400
| +764% | +$58.8K |
|
5615
CALL
Red Robin
RRGB
$145M
| $79K | ﹤0.01% |
6,400
+4,700
| +276% | +$43.8K |
|
5616
PUT
Tempest Therapeutics
TPST
$13.7M
| $79K | ﹤0.01% |
+1,385
| New | +$65.6K |
|
5617
CALL
Veritone
VERI
$101M
| $79K | ﹤0.01% |
43,700
+27,100
| +163% | +$60.4K |
|
5618
CALL
Wabash National
WNC
$512M
| $79K | ﹤0.01% |
3,100
-1,000
| -24% | -$22.6K |
|
|
ACRE
5619
Ares Commercial Real Estate
ACRE
$236M
| $78K | ﹤0.01% |
7,529
-13,715
| -65% | -$135K |
|
5620
PUT
AudioEye
AEYE
$72.3M
| $78K | ﹤0.01% |
14,500
+13,000
| +867% | +$59K |
|
5621
PUT
Caribou Biosciences
CRBU
$145M
| $78K | ﹤0.01% |
+13,700
| New | +$67.7K |
|
5622
PUT
American Century Diversified Corporate Bond ETF
KORP
$869M
| $78K | ﹤0.01% |
1,400
-400
| -22% | -$18K |
|
5623
Legacy Housing
LEGH
$625M
| $78K | ﹤0.01% |
+3,097
| New | +$65.5K |
|
5624
PUT
Moelis & Co
MC
$4.97B
| $78K | ﹤0.01% |
1,400
+900
| +180% | +$42.3K |
|
5625
CALL
Phinia Inc
PHIN
$2.72B
| $78K | ﹤0.01% |
2,600
-6,500
| -71% | -$174K |
|
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.