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 | |
|---|---|---|---|---|---|---|
4851
Douglas Emmett
DEI
$2B
| $202K | ﹤0.01% |
14,625
+6,598
| +82% | +$90.3K |
|
4852
PUT
Intapp
INTA
$2.54B
| $202K | ﹤0.01% |
5,900
-1,900
| -24% | -$74.6K |
|
4853
CALL
J&J Snack Foods
JJSF
$1.43B
| $202K | ﹤0.01% |
1,400
+100
| +8% | +$15.1K |
|
4854
Ormat Technologies
ORA
$5.96B
| $202K | ﹤0.01% |
+3,066
| New | +$205K |
|
4855
Royalty Pharma
RPRX
$26B
| $202K | ﹤0.01% |
6,672
-27,943
| -81% | -$824K |
|
4856
SI-BONE Inc
SIBN
$789M
| $202K | ﹤0.01% |
12,343
+11,991
| +3,407% | +$226K |
|
|
UROY
4857
CALL
Uranium Royalty Corp
UROY
$1.31B
| $202K | ﹤0.01% |
84,900
+70,800
| +502% | +$201K |
|
4858
CALL
Brixmor Property Group
BRX
$9.6B
| $201K | ﹤0.01% |
8,600
+6,800
| +378% | +$154K |
|
4859
CALL
Movado Group
MOV
$840M
| $201K | ﹤0.01% |
7,200
+1,700
| +31% | +$47.6K |
|
4860
CALL
Pricesmart
PSMT
$5.96B
| $201K | ﹤0.01% |
2,400
-2,300
| -49% | -$183K |
|
|
FLNA
4861
Filana Therapeutics
FLNA
$48.3M
| $201K | ﹤0.01% |
9,938
+9,085
| +1,065% | +$209K |
|
4862
ProShares UltraShort S&P500
SDS
$420M
| $201K | ﹤0.01% |
+1,617
| New | +$223K |
|
4863
Cardiff Oncology
CRDF
$66.9M
| $200K | ﹤0.01% |
+37,591
| New | +$99.9K |
|
4864
Flex
FLEX
$41.8B
| $200K | ﹤0.01% |
7,021
-43,929
| -86% | -$1.15M |
|
4865
Merchants Bancorp
MBIN
$2.56B
| $200K | ﹤0.01% |
4,632
-2,383
| -34% | -$99.7K |
|
4866
CALL
Sabra Healthcare REIT
SBRA
$5.29B
| $200K | ﹤0.01% |
13,600
+9,200
| +209% | +$127K |
|
4867
CALL
Dine Brands
DIN
$453M
| $199K | ﹤0.01% |
4,300
+2,100
| +95% | +$97.6K |
|
4868
WisdomTree India Earnings Fund ETF
EPI
$2.06B
| $199K | ﹤0.01% |
4,589
-5,164
| -53% | -$222K |
|
|
KYNB
4869
CALL
Kyntra Bio
KYNB
$27.6M
| $199K | ﹤0.01% |
3,404
+2,764
| +432% | +$119K |
|
4870
VanEck Agribusiness ETF
MOO
$974M
| $199K | ﹤0.01% |
+2,649
| New | +$193K |
|
4871
Perella Weinberg Partners
PWP
$1.28B
| $199K | ﹤0.01% |
+14,132
| New | +$178K |
|
4872
PUT
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$256M
| $199K | ﹤0.01% |
10,600
+2,500
| +31% | +$40.1K |
|
|
ZUO
4873
PUT
DELISTED
Zuora, Inc.
ZUO
| $199K | ﹤0.01% |
21,900
-5,500
| -20% | -$47.9K |
|
4874
PUT
Eastern Bankshares
EBC
$5.25B
| $198K | ﹤0.01% |
14,400
+9,700
| +206% | +$132K |
|
4875
Lennox International
LII
$14.6B
| $198K | ﹤0.01% |
407
+326
| +402% | +$148K |
|
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.