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 | |
|---|---|---|---|---|---|---|
|
FFAI
6476
CALL
Faraday Future Intelligent Electric
FFAI
$13.1M
| $40K | ﹤0.01% |
67
+38
| +131% | +$66.9K |
|
|
PGTI
6477
CALL
DELISTED
PGT, Inc.
PGTI
| $40K | ﹤0.01% |
8,600
-50,600
| -85% | -$2.1M |
|
6478
CALL
Acumen Pharmaceuticals
ABOS
$158M
| $39K | ﹤0.01% |
9,800
-1,700
| -15% | -$6.41K |
|
6479
PUT
ACI Worldwide
ACIW
$5.82B
| $39K | ﹤0.01% |
+1,200
| New | +$37.1K |
|
6480
ALX Oncology
ALXO
$257M
| $39K | ﹤0.01% |
3,514
-4,366
| -55% | -$61.3K |
|
6481
PUT
Aquestive Therapeutics
AQST
$460M
| $39K | ﹤0.01% |
+9,300
| New | +$31K |
|
6482
PUT
Torrid Holdings
CURV
$256M
| $39K | ﹤0.01% |
8,100
+200
| +3% | +$987 |
|
6483
PUT
Cavco Industries
CVCO
$4.2B
| $39K | ﹤0.01% |
+100
| New | +$35.4K |
|
6484
CALL
Emergent Biosolutions
EBS
$370M
| $39K | ﹤0.01% |
15,700
-6,200
| -28% | -$14K |
|
6485
iShares MSCI South Africa ETF
EZA
$540M
| $39K | ﹤0.01% |
998
-2,552
| -72% | -$98.6K |
|
6486
CALL
H.B. Fuller
FUL
$2.91B
| $39K | ﹤0.01% |
500
+400
| +400% | +$31.3K |
|
6487
Graco
GGG
$12.9B
| $39K | ﹤0.01% |
427
+224
| +110% | +$19.8K |
|
6488
Hubbell
HUBB
$25.1B
| $39K | ﹤0.01% |
+95
| New | +$34.4K |
|
6489
Immunic
IMUX
$192M
| $39K | ﹤0.01% |
+2,976
| New | +$38.7K |
|
6490
PUT
Innoviva
INVA
$1.54B
| $39K | ﹤0.01% |
+2,600
| New | +$40.8K |
|
6491
Kennametal
KMT
$2.55B
| $39K | ﹤0.01% |
1,567
-9,029
| -85% | -$222K |
|
6492
CALL
Kodiak Sciences
KOD
$2.55B
| $39K | ﹤0.01% |
7,500
+700
| +10% | +$3.43K |
|
6493
CALL
Karyopharm Therapeutics
KPTI
$50.8M
| $39K | ﹤0.01% |
1,753
+1,646
| +1,538% | +$28.9K |
|
6494
PUT
LivaNova
LIVN
$4.45B
| $39K | ﹤0.01% |
700
+400
| +133% | +$20.8K |
|
6495
CALL
LSI Industries
LYTS
$850M
| $39K | ﹤0.01% |
2,600
-100
| -4% | -$1.41K |
|
6496
Neumora Therapeutics
NMRA
$280M
| $39K | ﹤0.01% |
+2,849
| New | +$46.1K |
|
6497
PUT
ReNew
RNW
$2.25B
| $39K | ﹤0.01% |
6,500
| – | – |
|
6498
PUT
Sonic Automotive
SAH
$2.95B
| $39K | ﹤0.01% |
700
+600
| +600% | +$31.8K |
|
6499
CALL
TechTarget
TTGT
$315M
| $39K | ﹤0.01% |
+1,200
| New | +$39.5K |
|
|
AGEN
6500
Agenus
AGEN
$325M
| $38K | ﹤0.01% |
3,305
+1,648
| +99% | +$21.9K |
|
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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.