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 | |
|---|---|---|---|---|---|---|
|
GTM
2301
CALL
ZoomInfo Technologies
GTM
$861M
| $2.22M | ﹤0.01% |
138,800
-292,800
| -68% | -$4.77M |
|
2302
PUT
FIVE9
FIVN
$1.77B
| $2.22M | ﹤0.01% |
35,800
+23,100
| +182% | +$1.6M |
|
2303
SentinelOne
S
$6.22B
| $2.22M | ﹤0.01% |
95,290
-30,633
| -24% | -$800K |
|
2304
CALL
Equinox Gold
EQX
$7.32B
| $2.22M | ﹤0.01% |
368,900
+195,800
| +113% | +$908K |
|
2305
PUT
ODDITY Tech
ODD
$708M
| $2.22M | ﹤0.01% |
51,100
+37,200
| +268% | +$1.61M |
|
2306
PUT
Sigma Lithium
SGML
$1.08B
| $2.22M | ﹤0.01% |
171,200
-62,500
| -27% | -$1.12M |
|
2307
Aecom
ACM
$9.07B
| $2.21M | ﹤0.01% |
+22,580
| New | +$2.04M |
|
2308
CALL
Varonis Systems
VRNS
$5.25B
| $2.21M | ﹤0.01% |
46,900
+37,800
| +415% | +$1.8M |
|
2309
CALL
Madison Square Garden
MSGE
$3.61B
| $2.21M | ﹤0.01% |
56,400
+4,200
| +8% | +$150K |
|
2310
Huntington Bancshares
HBAN
$35.1B
| $2.21M | ﹤0.01% |
158,334
+83,182
| +111% | +$1.08M |
|
2311
PUT
Hertz
HTZ
$572M
| $2.21M | ﹤0.01% |
282,000
-45,900
| -14% | -$376K |
|
|
GTLS
2312
CALL
DELISTED
Chart Industries
GTLS
| $2.21M | ﹤0.01% |
13,400
-5,300
| -28% | -$712K |
|
2313
CALL
HealthEquity
HQY
$7.91B
| $2.2M | ﹤0.01% |
27,000
-11,200
| -29% | -$874K |
|
2314
CALL
Groupon
GRPN
$980M
| $2.2M | ﹤0.01% |
165,100
-213,100
| -56% | -$3.25M |
|
2315
PUT
Array Technologies
ARRY
$818M
| $2.2M | ﹤0.01% |
147,300
-17,900
| -11% | -$247K |
|
2316
PUT
Viatris
VTRS
$20.1B
| $2.19M | ﹤0.01% |
183,900
+30,000
| +19% | +$361K |
|
2317
PUT
Taboola.com
TBLA
$1.32B
| $2.19M | ﹤0.01% |
493,300
+145,700
| +42% | +$649K |
|
2318
CALL
Upwork
UPWK
$1.09B
| $2.19M | ﹤0.01% |
178,400
+88,500
| +98% | +$1.2M |
|
2319
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $2.18M | ﹤0.01% |
36,600
-9,300
| -20% | -$541K |
|
2320
CALL
Guardant Health
GH
$19.5B
| $2.18M | ﹤0.01% |
105,700
+83,600
| +378% | +$1.79M |
|
2321
PUT
Molina Healthcare
MOH
$10.3B
| $2.18M | ﹤0.01% |
5,300
-4,800
| -48% | -$1.86M |
|
2322
CALL
First Horizon
FHN
$12.1B
| $2.18M | ﹤0.01% |
141,300
+32,500
| +30% | +$467K |
|
2323
WIX.com
WIX
$2.15B
| $2.18M | ﹤0.01% |
+15,834
| New | +$2.08M |
|
2324
PUT
iQIYI
IQ
$1.18B
| $2.17M | ﹤0.01% |
514,300
-93,200
| -15% | -$358K |
|
2325
PUT
Synaptics
SYNA
$4.41B
| $2.17M | ﹤0.01% |
22,300
+7,200
| +48% | +$757K |
|
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.