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 | |
|---|---|---|---|---|---|---|
4876
PUT
LendingTree
TREE
$442M
| $198K | ﹤0.01% |
4,700
-4,300
| -48% | -$150K |
|
4877
First Trust Natural Gas ETF
FCG
$637M
| $197K | ﹤0.01% |
7,215
+1,455
| +25% | +$35.6K |
|
4878
PUT
abrdn Physical Silver Shares ETF
SIVR
$3.98B
| $197K | ﹤0.01% |
8,300
+6,300
| +315% | +$141K |
|
4879
Valaris
VAL
$5.27B
| $197K | ﹤0.01% |
+2,627
| New | +$176K |
|
4880
Ero Copper
ERO
$2.75B
| $196K | ﹤0.01% |
10,196
-6,157
| -38% | -$102K |
|
4881
PUT
Fidelity National Financial
FNF
$13.9B
| $196K | ﹤0.01% |
3,700
+1,500
| +68% | +$75.6K |
|
4882
PUT
Radiant Logistics
RLGT
$386M
| $196K | ﹤0.01% |
36,300
+26,400
| +267% | +$157K |
|
4883
CALL
Tarsus Pharmaceuticals
TARS
$2.53B
| $196K | ﹤0.01% |
5,400
+3,800
| +238% | +$112K |
|
4884
CALL
Tenaris
TS
$28.8B
| $196K | ﹤0.01% |
5,000
-900
| -15% | -$31.2K |
|
4885
PUT
Genesis Energy
GEL
$1.83B
| $195K | ﹤0.01% |
17,600
+15,800
| +878% | +$181K |
|
4886
CALL
SSR Mining
SSRM
$5.28B
| $195K | ﹤0.01% |
43,800
+29,700
| +211% | +$207K |
|
4887
CALL
Takeda Pharmaceutical
TAK
$54.5B
| $195K | ﹤0.01% |
14,100
-246,200
| -95% | -$3.58M |
|
4888
CALL
Twist Bioscience
TWST
$5.65B
| $195K | ﹤0.01% |
5,700
-32,800
| -85% | -$1.18M |
|
|
AUGX
4889
CALL
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $195K | ﹤0.01% |
47,800
+1,200
| +3% | +$5.37K |
|
|
KLG
4890
DELISTED
WK Kellogg Co
KLG
| $194K | ﹤0.01% |
+10,360
| New | +$151K |
|
4891
CALL
Navitas Semiconductor
NVTS
$2.85B
| $194K | ﹤0.01% |
40,700
+34,400
| +546% | +$202K |
|
4892
Odyssey Marine Exploration
OMEX
$36.4M
| $194K | ﹤0.01% |
51,033
-134,240
| -72% | -$597K |
|
4893
CALL
Revolve Group
RVLV
$1.83B
| $194K | ﹤0.01% |
9,200
-14,900
| -62% | -$261K |
|
4894
CALL
Banco Santander
SAN
$200B
| $194K | ﹤0.01% |
40,200
+25,800
| +179% | +$108K |
|
4895
CALL
TFS Financial
TFSL
$5.31B
| $194K | ﹤0.01% |
15,500
+1,100
| +8% | +$14.6K |
|
4896
CALL
Tennant Co
TNC
$1.44B
| $194K | ﹤0.01% |
+1,600
| New | +$163K |
|
4897
PUT
Telefônica Brasil
VIV
$20.8B
| $194K | ﹤0.01% |
23,100
+22,800
| +7,600% | +$240K |
|
4898
Blend Labs
BLND
$424M
| $193K | ﹤0.01% |
59,589
+6,138
| +11% | +$16.5K |
|
4899
CALL
BrightView Holdings
BV
$1.23B
| $193K | ﹤0.01% |
+16,300
| New | +$148K |
|
4900
PUT
Pulse Biosciences
PLSE
$2.42B
| $193K | ﹤0.01% |
22,200
+1,900
| +9% | +$17.5K |
|
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.