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 | |
|---|---|---|---|---|---|---|
3801
PUT
Prothena Corp
PRTA
$448M
| $532K | ﹤0.01% |
21,500
-61,800
| -74% | -$1.84M |
|
3802
Beyond Meat
BYND
$279M
| $530K | ﹤0.01% |
+64,039
| New | +$493K |
|
3803
PUT
Howard Hughes
HHH
$4B
| $530K | ﹤0.01% |
7,658
+2,623
| +52% | +$195K |
|
3804
Shoals Technologies Group
SHLS
$1.43B
| $530K | ﹤0.01% |
47,471
-27,404
| -37% | -$377K |
|
3805
PUT
Energy Fuels
UUUU
$2.83B
| $530K | ﹤0.01% |
84,300
+22,100
| +36% | +$149K |
|
3806
PUT
Opko Health
OPK
$1.23B
| $529K | ﹤0.01% |
440,900
+298,600
| +210% | +$299K |
|
3807
PUT
Crinetics Pharmaceuticals
CRNX
$8.88B
| $528K | ﹤0.01% |
11,300
+5,600
| +98% | +$219K |
|
|
TEN
3808
CALL
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $528K | ﹤0.01% |
20,800
-124,600
| -86% | -$3.02M |
|
|
TELL
3809
CALL
DELISTED
Tellurian Inc.
TELL
| $527K | ﹤0.01% |
797,600
-12,000
| -1% | -$8.14K |
|
|
ITOS
3810
CALL
DELISTED
iTeos Therapeutics
ITOS
| $526K | ﹤0.01% |
38,600
-6,800
| -15% | -$74.1K |
|
3811
Vivid Seats
SEAT
$88.7M
| $526K | ﹤0.01% |
+4,395
| New | +$516K |
|
3812
PUT
Cabot Corp
CBT
$4.7B
| $525K | ﹤0.01% |
5,700
+5,200
| +1,040% | +$423K |
|
3813
PUT
Emcor
EME
$31.4B
| $525K | ﹤0.01% |
1,500
-3,900
| -72% | -$1.05M |
|
3814
PUT
Brookfield Infrastructure Partners
BIP
$19.3B
| $524K | ﹤0.01% |
16,800
+9,500
| +130% | +$288K |
|
3815
Credo Technology Group
CRDO
$35.9B
| $524K | ﹤0.01% |
24,733
+20,127
| +437% | +$421K |
|
3816
PUT
Magnolia Oil & Gas
MGY
$5.55B
| $524K | ﹤0.01% |
20,200
+11,700
| +138% | +$257K |
|
3817
CALL
Philips
PHG
$25B
| $524K | ﹤0.01% |
29,290
-96,367
| -77% | -$1.85M |
|
|
ENLC
3818
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $523K | ﹤0.01% |
38,400
-56,000
| -59% | -$694K |
|
3819
BioNTech
BNTX
$23.4B
| $522K | ﹤0.01% |
+5,665
| New | +$543K |
|
3820
CALL
Ginkgo Bioworks
DNA
$503M
| $521K | ﹤0.01% |
11,245
-1,828
| -14% | -$94.6K |
|
3821
CALL
MacroGenics
MGNX
$245M
| $521K | ﹤0.01% |
35,400
+30,900
| +687% | +$467K |
|
3822
PUT
NETGEAR
NTGR
$663M
| $521K | ﹤0.01% |
33,100
+10,200
| +45% | +$148K |
|
3823
Rollins
ROL
$18.8B
| $521K | ﹤0.01% |
11,267
+3,149
| +39% | +$139K |
|
3824
ProShares Ultra Semiconductors
USD
$2.35B
| $521K | ﹤0.01% |
21,052
-25,528
| -55% | -$498K |
|
3825
PUT
Liberty Broadband Class C
LBRDK
$4.72B
| $520K | ﹤0.01% |
9,100
-13,400
| -60% | -$886K |
|
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.