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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
OPI
4976
PUT
DELISTED
Office Properties Income Trust
OPI
| $144K | ﹤0.01% |
70,700
+35,500
| +101% | +$77.2K |
|
4977
Prosperity Bancshares
PB
$8.9B
| $144K | ﹤0.01% |
+2,368
| New | +$146K |
|
4978
PUT
Replimune Group
REPL
$455M
| $144K | ﹤0.01% |
16,000
-27,400
| -63% | -$191K |
|
4979
CALL
1st Source
SRCE
$2.17B
| $144K | ﹤0.01% |
+2,700
| New | +$137K |
|
4980
PUT
SS&C Technologies
SSNC
$18.9B
| $144K | ﹤0.01% |
2,300
-600
| -21% | -$37.2K |
|
|
TERN
4981
DELISTED
Terns Pharmaceuticals
TERN
| $144K | ﹤0.01% |
+21,243
| New | +$129K |
|
4982
PUT
Teekay
TK
$996M
| $144K | ﹤0.01% |
16,100
-52,600
| -77% | -$443K |
|
|
TRUE
4983
CALL
DELISTED
TrueCar
TRUE
| $144K | ﹤0.01% |
46,300
-2,600
| -5% | -$7.62K |
|
4984
PUT
Woodside Energy
WDS
$44.2B
| $144K | ﹤0.01% |
7,700
-3,300
| -30% | -$61.4K |
|
|
BRAG
4985
CALL
Bragg Gaming Group
BRAG
$42.2M
| $143K | ﹤0.01% |
24,800
+23,000
| +1,278% | +$138K |
|
4986
Dollar Tree
DLTR
$24.8B
| $143K | ﹤0.01% |
+1,345
| New | +$159K |
|
|
HUYA
4987
CALL
Huya Inc
HUYA
$558M
| $143K | ﹤0.01% |
36,400
-356,400
| -91% | -$1.68M |
|
4988
STAG Industrial
STAG
$7.5B
| $143K | ﹤0.01% |
+3,967
| New | +$141K |
|
4989
PUT
Aemetis
AMTX
$99.2M
| $142K | ﹤0.01% |
47,200
-13,100
| -22% | -$49.9K |
|
4990
PUT
AerSale
ASLE
$291M
| $142K | ﹤0.01% |
20,600
-15,900
| -44% | -$114K |
|
4991
CALL
Atossa Therapeutics
ATOS
$23M
| $142K | ﹤0.01% |
7,973
+5,306
| +199% | +$117K |
|
4992
CALL
Intrepid Potash
IPI
$476M
| $142K | ﹤0.01% |
6,100
-10,200
| -63% | -$235K |
|
4993
Lexicon Pharmaceuticals
LXRX
$1.03B
| $142K | ﹤0.01% |
+84,637
| New | +$152K |
|
4994
CALL
Maravai LifeSciences
MRVI
$972M
| $142K | ﹤0.01% |
19,900
-14,000
| -41% | -$121K |
|
4995
PUT
Old Republic International
ORI
$10.9B
| $142K | ﹤0.01% |
4,600
+2,700
| +142% | +$82.7K |
|
4996
Pegasystems
PEGA
$5.09B
| $142K | ﹤0.01% |
+4,692
| New | +$141K |
|
4997
Savara
SVRA
$1.08B
| $142K | ﹤0.01% |
35,357
+25,338
| +253% | +$113K |
|
|
SIX
4998
DELISTED
Six Flags Entertainment Corp.
SIX
| $142K | ﹤0.01% |
4,286
-9,932
| -70% | -$261K |
|
|
HEES
4999
CALL
DELISTED
H&E Equipment Services
HEES
| $141K | ﹤0.01% |
3,200
-17,800
| -85% | -$913K |
|
5000
CALL
Kennametal
KMT
$2.56B
| $141K | ﹤0.01% |
6,000
+3,400
| +131% | +$83.6K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.