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 | |
|---|---|---|---|---|---|---|
5551
CALL
Caledonia Mining Corp
CMCL
$355M
| $101K | ﹤0.01% |
9,200
-7,400
| -45% | -$79.3K |
|
5552
CALL
Comtech Telecommunications
CMTL
$50.3M
| $101K | ﹤0.01% |
29,600
+23,100
| +355% | +$145K |
|
5553
Denali Therapeutics
DNLI
$3.65B
| $101K | ﹤0.01% |
+4,928
| New | +$92.6K |
|
5554
PUT
Essential Properties Realty Trust
EPRT
$6.77B
| $101K | ﹤0.01% |
3,800
-500
| -12% | -$12.5K |
|
5555
CALL
Knowles
KN
$3.13B
| $101K | ﹤0.01% |
6,300
+5,800
| +1,160% | +$95K |
|
5556
CALL
MasterBrand
MBC
$1.06B
| $101K | ﹤0.01% |
5,400
+2,700
| +100% | +$42.8K |
|
5557
PUT
MacroGenics
MGNX
$235M
| $101K | ﹤0.01% |
+6,900
| New | +$104K |
|
5558
CALL
Enpro
NPO
$6.63B
| $101K | ﹤0.01% |
+600
| New | +$93.1K |
|
5559
CALL
Quantum-Si Incorporated
QSI
$155M
| $101K | ﹤0.01% |
51,500
-124,500
| -71% | -$218K |
|
|
SPTN
5560
PUT
DELISTED
SpartanNash
SPTN
| $101K | ﹤0.01% |
5,000
+1,700
| +52% | +$36.6K |
|
5561
CALL
Village Farms International
VFF
$234M
| $101K | ﹤0.01% |
81,600
+55,100
| +208% | +$46.2K |
|
5562
Atossa Therapeutics
ATOS
$20.6M
| $100K | ﹤0.01% |
+3,706
| New | +$59.5K |
|
5563
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.28B
| $100K | ﹤0.01% |
+3,153
| New | +$94.9K |
|
5564
PUT
United States Copper Index Fund
CPER
$765M
| $100K | ﹤0.01% |
4,000
-4,900
| -55% | -$118K |
|
|
EB
5565
CALL
DELISTED
Eventbrite
EB
| $100K | ﹤0.01% |
18,300
+16,700
| +1,044% | +$121K |
|
|
ETWO
5566
CALL
DELISTED
E2open Parent Holdings
ETWO
| $100K | ﹤0.01% |
22,600
-24,600
| -52% | -$99.4K |
|
5567
Fortune Brands Innovations
FBIN
$5.88B
| $100K | ﹤0.01% |
1,186
+640
| +117% | +$50.9K |
|
5568
PUT
Frontdoor
FTDR
$5.1B
| $100K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$97.2K |
|
5569
PUT
Heron Therapeutics
HRTX
$93.9M
| $100K | ﹤0.01% |
36,300
+24,200
| +200% | +$60.8K |
|
|
LPRO
5570
CALL
DELISTED
Open Lending Corp
LPRO
| $100K | ﹤0.01% |
16,100
-35,100
| -69% | -$259K |
|
5571
News Corp Class A
NWSA
$14.9B
| $100K | ﹤0.01% |
3,827
-10,673
| -74% | -$271K |
|
|
ODP
5572
CALL
DELISTED
ODP
ODP
| $100K | ﹤0.01% |
1,900
-7,200
| -79% | -$376K |
|
|
OTLY
5573
CALL
Oatly Group
OTLY
$465M
| $100K | ﹤0.01% |
4,445
-495
| -10% | -$11.1K |
|
5574
Redwire
RDW
$2.06B
| $100K | ﹤0.01% |
22,866
-9,447
| -29% | -$30K |
|
|
TPH
5575
PUT
DELISTED
Tri Pointe Homes
TPH
| $100K | ﹤0.01% |
2,600
-900
| -26% | -$31.5K |
|
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.