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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5201
CALL
Quantum-Si Incorporated
QSI
$157M
| $90K | ﹤0.01% |
49,500
-42,400
| -46% | -$109K |
|
|
SGMO
5202
PUT
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $90K | ﹤0.01% |
28,800
-6,800
| -19% | -$26.4K |
|
5203
Shenandoah Telecom
SHEN
$631M
| $90K | ﹤0.01% |
5,682
+5,172
| +1,014% | +$94.6K |
|
5204
CALL
Neuronetics
STIM
$137M
| $90K | ﹤0.01% |
13,200
+8,600
| +187% | +$40.6K |
|
|
VRE
5205
CALL
DELISTED
Veris Residential
VRE
| $90K | ﹤0.01% |
5,700
-44,400
| -89% | -$655K |
|
5206
Direxion Daily Dow Jones Internet Bull 3X ETF
WEBL
$85.6M
| $90K | ﹤0.01% |
15,907
+10,140
| +176% | +$68.1K |
|
|
ACLX
5207
CALL
DELISTED
Arcellx
ACLX
| $89K | ﹤0.01% |
2,900
-100
| -3% | -$2.29K |
|
5208
APi Group
APG
$17B
| $89K | ﹤0.01% |
+7,167
| New | +$82.8K |
|
5209
BioAtla
BCAB
$5.61M
| $89K | ﹤0.01% |
216
+171
| +380% | +$70.9K |
|
5210
PUT
Capitol Federal Financial
CFFN
$1.1B
| $89K | ﹤0.01% |
10,300
-14,900
| -59% | -$123K |
|
5211
Capital Southwest
CSWC
$1.47B
| $89K | ﹤0.01% |
+5,222
| New | +$93.4K |
|
5212
CALL
Deluxe
DLX
$1.19B
| $89K | ﹤0.01% |
5,300
+4,700
| +783% | +$83.6K |
|
5213
iShares US Regional Banks ETF
IAT
$673M
| $89K | ﹤0.01% |
+1,880
| New | +$92.3K |
|
5214
InflaRx
IFRX
$253M
| $89K | ﹤0.01% |
28,890
+22,437
| +348% | +$57.1K |
|
5215
PUT
Neogen
NEOG
$2.51B
| $89K | ﹤0.01% |
5,900
-18,800
| -76% | -$268K |
|
|
NIU
5216
CALL
Niu Technologies
NIU
$203M
| $89K | ﹤0.01% |
17,100
+4,700
| +38% | +$18.1K |
|
|
SOL
5217
PUT
DELISTED
Emeren Group
SOL
| $89K | ﹤0.01% |
19,700
+2,600
| +15% | +$12K |
|
5218
CALL
BlackRock TCP Capital
TCPC
$273M
| $89K | ﹤0.01% |
6,900
-37,800
| -85% | -$471K |
|
5219
PUT
Teekay Tankers
TNK
$2.68B
| $89K | ﹤0.01% |
2,900
-5,300
| -65% | -$169K |
|
|
BECN
5220
PUT
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $89K | ﹤0.01% |
1,700
-4,300
| -72% | -$243K |
|
|
POSH
5221
CALL
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $89K | ﹤0.01% |
28,100
-98,800
| -78% | -$1.75M |
|
|
ATHX
5222
CALL
DELISTED
Athersys, Inc. Common Stock
ATHX
| $89K | ﹤0.01% |
106,500
-38,500
| -27% | -$47.9K |
|
|
REV
5223
CALL
DELISTED
Revlon, Inc.
REV
| $89K | ﹤0.01% |
207,900
-93,100
| -31% | -$413K |
|
5224
ProShares Ultra Energy
DIG
$81.3M
| $88K | ﹤0.01% |
2,082
-2,692
| -56% | -$116K |
|
5225
CALL
Genpact
G
$5.99B
| $88K | ﹤0.01% |
1,900
+600
| +46% | +$27.3K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.