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 | |
|---|---|---|---|---|---|---|
|
TEN
3001
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $1.12M | ﹤0.01% |
44,061
-780
| -2% | -$18.9K |
|
3002
CALL
Gogo Inc
GOGO
$540M
| $1.12M | ﹤0.01% |
127,300
+86,200
| +210% | +$776K |
|
3003
CALL
Hycroft Mining Holding Corp
HYMC
$1.87B
| $1.12M | ﹤0.01% |
505,500
-271,600
| -35% | -$586K |
|
3004
CALL
Grindr
GRND
$2.75B
| $1.12M | ﹤0.01% |
110,200
+82,800
| +302% | +$737K |
|
3005
PUT
Applied Optoelectronics
AAOI
$7.85B
| $1.11M | ﹤0.01% |
80,400
-6,800
| -8% | -$115K |
|
3006
PUT
Centrus Energy
LEU
$3.46B
| $1.11M | ﹤0.01% |
26,800
+25,700
| +2,336% | +$1.18M |
|
3007
PUT
Melco Resorts & Entertainment
MLCO
$2.18B
| $1.11M | ﹤0.01% |
154,400
-59,000
| -28% | -$473K |
|
3008
Thomson Reuters
TRI
$42.7B
| $1.11M | ﹤0.01% |
7,029
+2,372
| +51% | +$369K |
|
3009
CALL
UWM Holdings
UWMC
$624M
| $1.11M | ﹤0.01% |
153,000
+68,700
| +81% | +$464K |
|
3010
Trimble
TRMB
$13B
| $1.11M | ﹤0.01% |
+17,240
| New | +$982K |
|
3011
CALL
nVent Electric
NVT
$24.1B
| $1.11M | ﹤0.01% |
14,700
+10,300
| +234% | +$662K |
|
3012
CALL
Clearfield
CLFD
$436M
| $1.11M | ﹤0.01% |
35,900
+2,700
| +8% | +$77.4K |
|
3013
Opendoor
OPEN
$3.71B
| $1.11M | ﹤0.01% |
+377,724
| New | +$1.18M |
|
3014
Concentrix
CNXC
$1.5B
| $1.11M | ﹤0.01% |
+16,712
| New | +$1.36M |
|
|
SA
3015
Seabridge Gold
SA
$2.82B
| $1.11M | ﹤0.01% |
73,152
+36,653
| +100% | +$427K |
|
|
ACLX
3016
PUT
DELISTED
Arcellx
ACLX
| $1.1M | ﹤0.01% |
15,900
-19,800
| -55% | -$1.26M |
|
3017
PUT
Kanzhun
BZ
$7.03B
| $1.1M | ﹤0.01% |
63,000
+32,700
| +108% | +$516K |
|
3018
CALL
RXO
RXO
$3.98B
| $1.1M | ﹤0.01% |
50,500
+46,200
| +1,074% | +$990K |
|
3019
Labcorp
LH
$24.7B
| $1.1M | ﹤0.01% |
5,043
+4,926
| +4,210% | +$1.09M |
|
|
SAGE
3020
CALL
DELISTED
Sage Therapeutics
SAGE
| $1.1M | ﹤0.01% |
58,800
-6,100
| -9% | -$141K |
|
|
WCN
3021
CALL
Waste Connections
WCN
$42.7B
| $1.1M | ﹤0.01% |
6,400
+500
| +8% | +$80.4K |
|
3022
PUT
Louisiana-Pacific
LPX
$5.19B
| $1.1M | ﹤0.01% |
13,100
-12,800
| -49% | -$920K |
|
3023
CALL
Viasat
VSAT
$10.2B
| $1.1M | ﹤0.01% |
60,700
+29,200
| +93% | +$613K |
|
3024
CALL
Alight
ALIT
$520M
| $1.1M | ﹤0.01% |
5,565
+5,500
| +8,462% | +$996K |
|
3025
CALL
Gartner
IT
$9.87B
| $1.1M | ﹤0.01% |
2,300
-15,000
| -87% | -$6.9M |
|
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.