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 | |
|---|---|---|---|---|---|---|
|
JNPR
2826
PUT
DELISTED
Juniper Networks
JNPR
| $1.22M | ﹤0.01% |
41,400
+24,400
| +144% | +$670K |
|
|
GMS
2827
PUT
DELISTED
GMS Inc
GMS
| $1.22M | ﹤0.01% |
14,800
+5,300
| +56% | +$355K |
|
|
BERY
2828
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $1.22M | ﹤0.01% |
19,711
+14,593
| +285% | +$823K |
|
2829
Procept Biorobotics
PRCT
$950M
| $1.22M | ﹤0.01% |
29,085
+9,247
| +47% | +$315K |
|
2830
CALL
Waters Corp
WAT
$36.8B
| $1.22M | ﹤0.01% |
3,700
-4,500
| -55% | -$1.24M |
|
2831
CALL
Payoneer
PAYO
$2.41B
| $1.21M | ﹤0.01% |
233,100
+172,800
| +287% | +$952K |
|
2832
PUT
Snap-on
SNA
$20.9B
| $1.21M | ﹤0.01% |
4,200
-12,000
| -74% | -$3.24M |
|
|
MOR
2833
DELISTED
MorphoSys AG American Depositary Shares
MOR
| $1.21M | ﹤0.01% |
122,614
+119,435
| +3,757% | +$877K |
|
|
AZEK
2834
CALL
DELISTED
The AZEK Co
AZEK
| $1.21M | ﹤0.01% |
31,700
+4,000
| +14% | +$125K |
|
2835
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $1.21M | ﹤0.01% |
12,200
-14,700
| -55% | -$888K |
|
2836
PUT
AeroVironment
AVAV
$7.57B
| $1.21M | ﹤0.01% |
9,600
+4,400
| +85% | +$538K |
|
2837
Liquidia Corp
LQDA
$7.67B
| $1.21M | ﹤0.01% |
100,451
+63,064
| +169% | +$454K |
|
2838
CALL
Algoma Steel
ASTL
$455M
| $1.21M | ﹤0.01% |
120,200
-77,500
| -39% | -$600K |
|
2839
Equity Residential
EQR
$25.4B
| $1.2M | ﹤0.01% |
19,689
+18,428
| +1,461% | +$1.07M |
|
|
BPMC
2840
CALL
DELISTED
Blueprint Medicines
BPMC
| $1.2M | ﹤0.01% |
13,000
-1,500
| -10% | -$97.2K |
|
2841
Shake Shack
SHAK
$2.3B
| $1.2M | ﹤0.01% |
16,186
-3,231
| -17% | -$198K |
|
2842
PUT
CryoPort
CYRX
$775M
| $1.2M | ﹤0.01% |
77,400
+66,700
| +623% | +$872K |
|
2843
CALL
Eversource Energy
ES
$28.2B
| $1.2M | ﹤0.01% |
19,400
+12,100
| +166% | +$698K |
|
2844
PUT
Celanese
CE
$5.09B
| $1.2M | ﹤0.01% |
7,700
-30,900
| -80% | -$4.03M |
|
2845
ADT
ADT
$5.16B
| $1.19M | ﹤0.01% |
173,998
+45,058
| +35% | +$281K |
|
2846
PUT
RCI Hospitality Holdings
RICK
$199M
| $1.19M | ﹤0.01% |
17,900
+12,200
| +214% | +$712K |
|
2847
Teucrium Wheat Fund
WEAT
$314M
| $1.19M | ﹤0.01% |
39,761
+17,673
| +80% | +$512K |
|
|
PLL
2848
CALL
DELISTED
Piedmont Lithium
PLL
| $1.19M | ﹤0.01% |
42,000
-1,700
| -4% | -$49.9K |
|
2849
CALL
Evolus
EOLS
$394M
| $1.18M | ﹤0.01% |
112,400
+22,800
| +25% | +$204K |
|
2850
CALL
Lazard
LAZ
$4.37B
| $1.18M | ﹤0.01% |
34,000
+29,300
| +623% | +$882K |
|
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.