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 | |
|---|---|---|---|---|---|---|
|
BASE
3726
CALL
DELISTED
Couchbase
BASE
| $568K | ﹤0.01% |
21,600
+11,800
| +120% | +$307K |
|
3727
PUT
Cogent Communications
CCOI
$649M
| $568K | ﹤0.01% |
8,700
+3,700
| +74% | +$270K |
|
3728
CALL
RCI Hospitality Holdings
RICK
$203M
| $568K | ﹤0.01% |
9,800
-2,000
| -17% | -$118K |
|
|
ARR
3729
CALL
Armour Residential REIT
ARR
$2.32B
| $567K | ﹤0.01% |
28,700
-34,800
| -55% | -$669K |
|
3730
CALL
Kodak
KODK
$812M
| $567K | ﹤0.01% |
114,600
+38,300
| +50% | +$154K |
|
3731
Old Dominion Freight Line
ODFL
$47.1B
| $567K | ﹤0.01% |
+2,587
| New | +$540K |
|
3732
PUT
Tecnoglass
TGLS
$2.09B
| $567K | ﹤0.01% |
10,900
-1,700
| -13% | -$78.2K |
|
|
EVBG
3733
CALL
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $567K | ﹤0.01% |
16,300
+5,700
| +54% | +$161K |
|
3734
PUT
Alcon
ALC
$33.7B
| $566K | ﹤0.01% |
6,800
-5,100
| -43% | -$409K |
|
3735
CALL
Forward Air
FWRD
$467M
| $566K | ﹤0.01% |
18,200
+14,700
| +420% | +$615K |
|
|
AAMI
3736
CALL
Acadian Asset Management
AAMI
$2.94B
| $566K | ﹤0.01% |
24,800
+23,100
| +1,359% | +$498K |
|
3737
PUT
Energizer
ENR
$1.5B
| $565K | ﹤0.01% |
19,200
+2,700
| +16% | +$81.6K |
|
3738
CALL
QuidelOrtho
QDEL
$1.14B
| $565K | ﹤0.01% |
11,800
-65,200
| -85% | -$3.8M |
|
3739
CALL
Gates Industrial Corporation Ltd.
GTES
$6.69B
| $564K | ﹤0.01% |
31,900
+22,200
| +229% | +$321K |
|
3740
PUT
OR Royalties Inc
OR
$5.52B
| $564K | ﹤0.01% |
34,400
+27,100
| +371% | +$400K |
|
3741
NextDecade
NEXT
$1.63B
| $562K | ﹤0.01% |
+99,015
| New | +$494K |
|
|
BASE
3742
PUT
DELISTED
Couchbase
BASE
| $560K | ﹤0.01% |
21,300
-4,100
| -16% | -$107K |
|
3743
CALL
BlueLinx
BXC
$465M
| $560K | ﹤0.01% |
4,300
+2,900
| +207% | +$341K |
|
3744
Yum China
YUMC
$15.6B
| $559K | ﹤0.01% |
+14,055
| New | +$555K |
|
|
HIVE
3745
PUT
HIVE Digital Technologies
HIVE
$760M
| $558K | ﹤0.01% |
165,800
+31,200
| +23% | +$111K |
|
3746
KKR & Co
KKR
$92.2B
| $558K | ﹤0.01% |
5,548
-1,628
| -23% | -$150K |
|
3747
CALL
Veralto
VLTO
$24.2B
| $558K | ﹤0.01% |
6,300
-2,600
| -29% | -$216K |
|
3748
PUT
Arrowhead Research
ARWR
$12.1B
| $557K | ﹤0.01% |
19,500
+500
| +3% | +$16K |
|
3749
PUT
Viper Energy
VNOM
$8.21B
| $557K | ﹤0.01% |
14,500
+4,100
| +39% | +$139K |
|
3750
CBRE Group
CBRE
$43.1B
| $556K | ﹤0.01% |
+5,720
| New | +$514K |
|
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.