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 | |
|---|---|---|---|---|---|---|
|
HEES
3901
PUT
DELISTED
H&E Equipment Services
HEES
| $481K | ﹤0.01% |
7,500
+6,200
| +477% | +$340K |
|
3902
CALL
LoveSac
LOVE
$242M
| $481K | ﹤0.01% |
21,300
+12,200
| +134% | +$284K |
|
|
VMEO
3903
DELISTED
Vimeo
VMEO
| $481K | ﹤0.01% |
117,715
+108,126
| +1,128% | +$461K |
|
3904
VeriSign
VRSN
$26.5B
| $481K | ﹤0.01% |
2,540
+2,209
| +667% | +$434K |
|
3905
CALL
Archrock
AROC
$6.2B
| $479K | ﹤0.01% |
24,400
+21,700
| +804% | +$371K |
|
3906
CALL
Pacific Biosciences
PACB
$435M
| $478K | ﹤0.01% |
127,600
+40,700
| +47% | +$238K |
|
3907
Cirrus Logic
CRUS
$6.8B
| $477K | ﹤0.01% |
5,156
+3,869
| +301% | +$334K |
|
3908
ING
ING
$93B
| $477K | ﹤0.01% |
28,950
-39,052
| -57% | -$558K |
|
|
LAR
3909
CALL
Lithium Argentina AG
LAR
$909M
| $477K | ﹤0.01% |
88,500
+87,500
| +8,750% | +$425K |
|
3910
CALL
Jefferies Financial Group
JEF
$12.6B
| $476K | ﹤0.01% |
10,800
-10,100
| -48% | -$421K |
|
|
PENG
3911
CALL
Penguin Solutions Inc
PENG
$2.27B
| $476K | ﹤0.01% |
18,100
-35,200
| -66% | -$769K |
|
3912
PUT
Caleres
CAL
$435M
| $475K | ﹤0.01% |
11,600
-93,600
| -89% | -$3.27M |
|
3913
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
| $475K | ﹤0.01% |
20,700
+17,900
| +639% | +$398K |
|
|
ARI
3914
CALL
Apollo Commercial Real Estate
ARI
$863M
| $474K | ﹤0.01% |
42,600
-63,600
| -60% | -$713K |
|
3915
PUT
Teleflex
TFX
$5.94B
| $474K | ﹤0.01% |
2,100
+1,200
| +133% | +$285K |
|
3916
PUT
Navient
NAVI
$827M
| $473K | ﹤0.01% |
27,200
-4,300
| -14% | -$72.5K |
|
3917
CALL
Grupo Cibest SA
CIB
$21.3B
| $472K | ﹤0.01% |
13,800
+12,900
| +1,433% | +$418K |
|
|
INFA
3918
CALL
DELISTED
Informatica
INFA
| $472K | ﹤0.01% |
13,500
+3,400
| +34% | +$107K |
|
3919
PUT
Revvity
RVTY
$12.6B
| $472K | ﹤0.01% |
4,500
-52,600
| -92% | -$5.6M |
|
3920
PUT
Appian
APPN
$2.11B
| $471K | ﹤0.01% |
11,800
+300
| +3% | +$10.4K |
|
3921
Atea Pharmaceuticals
AVIR
$369M
| $471K | ﹤0.01% |
116,655
+103,197
| +767% | +$404K |
|
3922
PUT
PJT Partners
PJT
$4.24B
| $471K | ﹤0.01% |
5,000
+4,900
| +4,900% | +$482K |
|
3923
PUT
Carlisle Companies
CSL
$13.5B
| $470K | ﹤0.01% |
1,200
+700
| +140% | +$238K |
|
3924
CALL
Green Brick Partners
GRBK
$3.1B
| $469K | ﹤0.01% |
7,800
-5,900
| -43% | -$316K |
|
|
RAPT
3925
DELISTED
RAPT Therapeutics
RAPT
| $468K | ﹤0.01% |
+6,516
| New | +$906K |
|
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.