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 | |
|---|---|---|---|---|---|---|
4776
PUT
Vitesse Energy
VTS
$644M
| $181K | ﹤0.01% |
8,300
+5,800
| +232% | +$134K |
|
4777
Arcutis Biotherapeutics
ARQT
$3.48B
| $180K | ﹤0.01% |
+55,818
| New | +$152K |
|
4778
ICU Medical
ICUI
$4.16B
| $180K | ﹤0.01% |
+1,812
| New | +$177K |
|
4779
PUT
Magnolia Oil & Gas
MGY
$5.93B
| $180K | ﹤0.01% |
8,500
-11,600
| -58% | -$254K |
|
|
JOYY
4780
JOYY Inc
JOYY
$3.73B
| $180K | ﹤0.01% |
+4,545
| New | +$181K |
|
|
DNMR
4781
CALL
DELISTED
Danimer Scientific, Inc.
DNMR
| $180K | ﹤0.01% |
4,428
+1,215
| +38% | +$66.1K |
|
4782
Clean Harbors
CLH
$17.2B
| $179K | ﹤0.01% |
+1,028
| New | +$169K |
|
4783
CALL
Crescent Energy
CRGY
$3.65B
| $179K | ﹤0.01% |
13,600
+100
| +0.7% | +$1.18K |
|
4784
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1B
| $179K | ﹤0.01% |
8,939
+1,444
| +19% | +$30.4K |
|
4785
PUT
Legacy Housing
LEGH
$629M
| $179K | ﹤0.01% |
+7,100
| New | +$150K |
|
4786
CALL
Vanguard Total International Stock ETF
VXUS
$151B
| $179K | ﹤0.01% |
3,100
-9,300
| -75% | -$508K |
|
4787
CALL
Janus International
JBI
$702M
| $178K | ﹤0.01% |
13,700
+800
| +6% | +$8.51K |
|
|
VRNT
4788
CALL
DELISTED
Verint Systems
VRNT
| $178K | ﹤0.01% |
6,600
+6,200
| +1,550% | +$144K |
|
4789
CALL
Annovis Bio
ANVS
$72.3M
| $177K | ﹤0.01% |
+9,500
| New | +$84.2K |
|
4790
PUT
Corebridge Financial
CRBG
$14.3B
| $177K | ﹤0.01% |
8,200
+6,100
| +290% | +$126K |
|
4791
CALL
Enova International
ENVA
$6.09B
| $177K | ﹤0.01% |
3,200
+2,700
| +540% | +$125K |
|
4792
Mirum Pharmaceuticals
MIRM
$6.56B
| $177K | ﹤0.01% |
+6,027
| New | +$182K |
|
4793
PUT
Clear Secure
YOU
$5.88B
| $177K | ﹤0.01% |
8,600
-32,900
| -79% | -$639K |
|
4794
CALL
Clarivate
CLVT
$1.38B
| $176K | ﹤0.01% |
19,100
+3,100
| +19% | +$22.9K |
|
4795
CALL
Fulgent Genetics
FLGT
$558M
| $176K | ﹤0.01% |
6,100
-38,600
| -86% | -$1.03M |
|
4796
CALL
Porch Group
PRCH
$1.35B
| $176K | ﹤0.01% |
57,400
+52,000
| +963% | +$73.1K |
|
4797
CALL
Stantec
STN
$8.17B
| $176K | ﹤0.01% |
+2,200
| New | +$153K |
|
4798
Vermilion Energy
VET
$1.66B
| $176K | ﹤0.01% |
+14,666
| New | +$194K |
|
|
BVH
4799
DELISTED
Bluegreen Vacations Holding Corporation
BVH
| $176K | ﹤0.01% |
+2,354
| New | +$137K |
|
4800
ACI Worldwide
ACIW
$6.12B
| $175K | ﹤0.01% |
5,721
+4,220
| +281% | +$106K |
|
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.