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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1801
CALL
Crinetics Pharmaceuticals
CRNX
$8.86B
| $3.88M | ﹤0.01% |
83,000
+53,300
| +179% | +$2.09M |
|
1802
CALL
Universal Display
OLED
$3.71B
| $3.87M | ﹤0.01% |
23,000
-18,500
| -45% | -$3.22M |
|
1803
PUT
Regions Financial
RF
$26.3B
| $3.87M | ﹤0.01% |
184,000
+5,300
| +3% | +$100K |
|
1804
CALL
TD Synnex
SNX
$19.4B
| $3.87M | ﹤0.01% |
34,200
+1,900
| +6% | +$197K |
|
1805
US Global Jets ETF
JETS
$802M
| $3.86M | ﹤0.01% |
183,842
+70,557
| +62% | +$1.38M |
|
1806
CALL
Yum China
YUMC
$14.9B
| $3.85M | ﹤0.01% |
96,900
+5,500
| +6% | +$217K |
|
1807
CALL
Rocket Companies
RKT
$36.9B
| $3.85M | ﹤0.01% |
264,600
-482,600
| -65% | -$5.99M |
|
|
JPGE
1808
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $3.85M | ﹤0.01% |
66,600
-26,900
| -29% | -$1.55M |
|
1809
CALL
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$542M
| $3.85M | ﹤0.01% |
88,800
+55,100
| +164% | +$2.27M |
|
1810
CALL
Hertz
HTZ
$572M
| $3.84M | ﹤0.01% |
490,300
+232,500
| +90% | +$1.9M |
|
1811
CALL
Impinj
PI
$3.89B
| $3.84M | ﹤0.01% |
29,900
+9,000
| +43% | +$945K |
|
|
CTLT
1812
PUT
DELISTED
CATALENT, INC.
CTLT
| $3.84M | ﹤0.01% |
68,000
-5,900
| -8% | -$319K |
|
1813
PUT
Teekay Tankers
TNK
$2.63B
| $3.84M | ﹤0.01% |
65,700
+29,300
| +80% | +$1.66M |
|
1814
CALL
Braze
BRZE
$2.45B
| $3.83M | ﹤0.01% |
86,500
+71,000
| +458% | +$3.83M |
|
1815
CALL
Corebridge Financial
CRBG
$14.1B
| $3.83M | ﹤0.01% |
133,300
+128,900
| +2,930% | +$3.18M |
|
1816
CALL
FirstEnergy
FE
$28.9B
| $3.82M | ﹤0.01% |
98,900
+23,500
| +31% | +$879K |
|
1817
CALL
Sweetgreen
SG
$713M
| $3.82M | ﹤0.01% |
151,100
+83,300
| +123% | +$1.21M |
|
|
ECHO
1818
PUT
EchoStar
ECHO
$25.5B
| $3.81M | ﹤0.01% |
267,500
+265,100
| +11,046% | +$3.7M |
|
1819
CALL
JFrog
FROG
$9.71B
| $3.81M | ﹤0.01% |
86,100
+44,000
| +105% | +$1.7M |
|
1820
CALL
Healthcare Realty
HR
$7.42B
| $3.8M | ﹤0.01% |
268,700
-276,600
| -51% | -$4.17M |
|
1821
Phillips 66
PSX
$82.9B
| $3.8M | ﹤0.01% |
+23,276
| New | +$3.35M |
|
1822
Avantor
AVTR
$7.81B
| $3.8M | ﹤0.01% |
148,497
+103,488
| +230% | +$2.46M |
|
1823
CALL
American Conservative Values ETF
ACVF
$149M
| $3.8M | ﹤0.01% |
63,300
+55,100
| +672% | +$2.11M |
|
1824
PUT
TKO Group
TKO
$13.5B
| $3.79M | ﹤0.01% |
43,900
+2,500
| +6% | +$208K |
|
1825
PUT
St. Joe Company
JOE
$3.57B
| $3.79M | ﹤0.01% |
65,400
+2,700
| +4% | +$149K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.